The most up to date information is

now available on our website

www.nadoa.org

Mergers

and

Acquisitions

2019 Handbook

© 2019 by The National Association of Division

Order Analysts

NADOA does not guarantee the accuracy of the information contained herein.

2019 Company Merger and

Acquisitions Handbook

NADOA Officers and Board 2019

President……….……...…….….……….……..…..…Jason Lucas

1st Vice President…….........…….….....………Luanne Johnson

2nd Vice President………..………....….……….…..... Lewis Box

Treasurer………………….….…….…...…....…........Jeff Kliewer

Corresponding Secretary…….….….…...……..Jennifer Lujano

Recording Secretary……………..….…...…….. Michelle Harris

Board Advisor………….….…....…...……..…... Cheryl Hampton

Director-CAPDOA………………....…...……….....Valerie Wibble

Director-DALWORTH.....................................Kimberly Ginter

Director-DADOA...........................................Lauren Roswald

Director-HADOA............................................April Luedecke

Director-PBADOA....................................... Kaprice Pearson

Director-SADOA.............................................Rona Erickson

Handbook Information

The Royalty Owner Relations section of this

handbook lists names, addresses & telephone

numbers for participating companies.

The back section of the handbook lists all

companies in alphabetical order in the left

column of the page. The current company to

contact is in the right column

an asterisk (*) following a company name in-

dicates a property sale rather than a merger

or reorganization.

Update Process

Please furnish a complete listing of any new

name or address changes applicable to your

company. Complete the form on the previous

page and return to the email address listed.

Please email completed form to administrator@nadoa.org

Date: ___________________________

From: _______________________________________________

Name Title Company

___________________________________________________

Address City State Zip

Phone: ____ - _____ - ______ ext. __________

Fax: ____ - _____ - ______ Email: ________________________

Updates will be made exactly as they appear on this form. Attach additional sheet if necessary.

Company Contacts

Name Title Contact Information

______________________________________________________________________________________________________________________________________________________ Mergers & Acquisitions and/or Old Company Name & New Company Name

Past Contact (lower case) PRESENT COMPANY (UPPER CASE) Old Company (lower case) NEW COMPANY NAME (UPPER CASE)

_________________________________________________________________________________________________________________________________

UPDATES

NADOA Company Mergers and Acquisitions

TYPE OF UPDATE

[ ] Personal Change [ ] Address Change [ ] Phone/Fax Update [ ] Other

[ ] Merger [ ] Acquisition [ ] Company Name change

www.nadoa.org

PO Box 44009

Denver, CO 80201

National Association of Division Order Analysts

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

6

1400 Corporation AMERICAN EXPLORATION COMPANY

3 TEC Energy Corp PLAINS E & P CO.

3300 Corporation AMERICAN EXPLORATION COMPANY

3 TECH Energy Corp PXP GULF COAST, INC.

44 Canyon, LLC CHEVRON MIDCONTINENT, LP

4700 Corp AMERICAN EXPLORATION COMPANY

500 Corporation 1987 AMERICAN EXPLORATION COMPANY

820 Management Trust 820 MT O&G TX (WY)(LA)(MULTI-STATE)

A & J Oil Co. NELSON R THOMAS

A & K Petroleum 1957 KERR-MCGEE CORP

A & K Petroleum 1957 DEVON ENERGY

A.E. Acquistion Corp. see Dominion Exploration & Production

AA Development Corp. 1984 AA ENERGY CORP (AMR ENERGY

Abaca Oil Co. 1963* see Dominion Exploration & Production

Abbeville Operating Corp. D.C. BINTLIFF

ABCO Energy Corp. 1983 TEJAS OIL & GAS CO

ABEL & BANCROFT

Aberdeen Petroleum 1975 DEVON ENERGY

Aberdeen Petroleum Corp. 1976 DEVON ENERGY

Abney Oil Co. 1980 P. & O. FALCO, INC

ABARTA Oil & Gas Co TALISMAN ENERGY USA INC

ABTEC Chemical Company 1980 TOTAL E&P USA INC

Acadia Petroleum Corp. FOUNTAIN OIL & GAS, INC.

Access Energy Corp YAHKEE GAS CO.

Acrol Oil Co. 1966 JAMES DONOGHUE

Ada Oil Corporation 1983* TOTAL E&P USA INC

ADA Resources 1979 ADAMS RESOURCES & ENERGY, INC.

ADAMS RESOURCES & ENERGY, INC.

Adams Resources Exploration Corp. ADAMS RESOURCES & ENERGY, INC.

Addington Brothers Mining Co. 1976 ASHLAND OIL INC.

Adena Exploration Inc. WASHITA PRODUCTION CO.

Adobe Gas Cos. APACHE CORP

Adobe Gas Pipeline APACHE CORP

Adobe Oil & Gas Corp. 1985 DEVON ENERGY

Adobe Oil Co. 1977 DEVON ENERGY

Adobe Resources Corp. DEVON ENERGY

Adobe Royalty, Inc. DEVON ENERGY

ADVANTAGE OIL & GAS, LTD.

AEC (Alberta Energy Co., Ltd) ENCANA CORP.

AEC Gas Company see Dominion Exploration & Production

AEC Gathering Services (USA), Inc. ENCANA GATHERING SERVICES (USA)

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

7

AEC Gulf of Mexico, Inc. ENCANA GULF OF MEXICO, INC.

AEC International (USA) Inc. ENCANA INTERNATIONAL (USA) INC.

AEC Marketing (USA) Inc. ENCANA MARKETING (USA) INC.

AEC Oil & Gas (USA) Inc. ENCANA OIL & GAS (USA) INC.

AEC Oil & Gas Co. Partnership ENCANA OIL & GAS PARTNERSHIP

AEC Oil & Gas Co., Ltd. ENCANA OIL & GAS CO. LTD

AEC Pipelines (USA) Inc. ENCANA PIPELINES (USA) INC

AEC Pipelines, Ltd ENCANA PIPELINES, LTD

AEC Storage & Hub Services, Inc. ENCANA GAS STORAGE INC.

AEC West Ltd. ENCANA WEST LTD

AERA ENERGY, LLC

Aetna Oil Co. 1950 STATOIL ENERGY INC

Agate Petroleum Inc. ST. MARY LAND & EXLORATION CO.

AGM Incorporated MAXUS EXPLORATION

AGS INVESTMENTS LLC managed by AVIVA

AGS LIMITED PARTNERSHIP managed by AVIVA

Aikman Brothers, TX Partnership Aikman Brothers, LLC

Aikman Petroleum, Inc 1983 * ENERTEC CORP.

Air Pilot Oil HESS COMPANIES

AJA Resources ADAMS RESOURCES & ENERGY

Alamco, Inc. CHESAPEAKE ENERGY CORP.

Alameda Energy, Inc. SLAWSON EXPLORATION COMPANY,

Alamo Oil & Gas, Ltd. GLOBAL NATURAL RESOURCES CORP.

Alamo Petroleum FARMLAND INDUSTRIES, INC.

Alamo Petroleum Co. ANADARKO E&P COMPANY, LP

Alaska Interstate Co. 1982 UNIMAR CORP.

Alberta Energy Co., Ltd. (AEC, Ltd.) ENCANA CORP.

Alco Oil & Gas 1969 ANADARKO E&P COMPANY, LP

Alcorn Oil Co 1929 CONOCOPHILLIPS

Alder Oil Co. 1946 NEWMONT OIL CO.

Alene Oil Co. 1989 TENKAY RESOURCES, INC.

Alexander Energy Corp. SANDRIDGE ENERGY, INC.

Allegheny Land & Mineral 1983 ALAMCO INC.

Allegro Petroleum, Inc. NORTHSTAR RESOURCES, INC.

Allen Oil Co. ANADARKO E&P COMPANY, LP

ALLIANCE PETROLEUM CORP.

Allied Ashland STATOIL ENERGY INC

Allied Chemical CONOCOPHILLIPS

Allied Chemical Corp CONOCOPHILLIPS

Allied Oil Co. ASHLAND OIL INC.

Allied Oil Co. 1948 ASHLAND OIL & REFINING CO.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

8

Alma Oil Co. 1915 Shell Oil Co.

Alminex LTD CANADIAN SUPERIOR

Alpar Resources PLAINS EXPLORATION & PRODUCTION

Alpar Resources Inc. 1981 ANADARKO E&P COMPANY, LP

Alta Energy Corp. DEVON ENERGY CORP.

Alta Natural Resources, LLC SILVER CREEK RESOURCES, LLC

Altair Oil & Gas Co. 1964 PIONEER NATURAL RESOURCES USA,

Altura Energy OCCIDENTAL PERMIAN, LP

Amalgamated Bonanza Petro 1979 CHEVRON CORP

Amarex, Inc. CALPINE NATURAL GAS, LP

Amarex, Inc. 1985 TGX CORP. (Templeton Energy)

Amarillo Minerals, Inc. 1970 PIONEER NUCLEAR, INC.

Amarillo Oil Co. PIONEER NATURAL RESOURCES USA,

Amarillo Oil Co. 1986 PIONEER NATURAL RESOURCES USA,

Amax Oil & Gas, Inc. ANADARKO E & P CO.

Amax Petroleum Corp. ANADARKO E & P CO.

Ambassador Oil Corp. 1965 ANADARKO PETROLEUM CORPORA-

AMBRIT ENERGY CORP.

Amcan Oil Corp 1970 CONOCOPHILLIPS

Amcan Oil Corp. 1952 LARIO OIL & GAS CO.

Amcog Acquisition Corp. see Dominion Exploration & Production

Amdel Inc. 1977 TOTAL E&P USA INC

Amerac Energy Corp. UNIT CORP.

Amerada Hess Corp. HESS CORPORATION

Amerada Petroleum Corp. 1969 HESS CORPORATION

American Agricultural Chemical CONOCOPHILLIPS

American Cometra Inc. RANGE RESOURCES INC.

American Corporate Resources, Inc. CONOCOPHILLIPS

AMERICAN ENERGY EXPLORATION

American Exploration Acquisition Co. see Dominion Exploration & Production

American Exploration Acquisition - VI Corp. see Dominion Exploration & Production

American Exploration Co. (Houston) see Dominion Exploration & Production

American Exploration Gas Systems Corp. see Dominion Exploration & Production

American Exploration Operating Co. see Dominion Exploration & Production

American Exploration Production Co. see Dominion Exploration & Production

American Independent Oil Co. 1970 CONOCOPHILLIPS

American Liberty Oil Co. TOTAL E&P USA INC

American Liberty Oil Co. 1957 TOTAL E&P USA INC

American Maracaibo FELMONT OIL CORP.

American Maracaibo Co. 1958 FELMONT OIL CORP.

American Metal Co. (LTD) ANADARKO E & P CO.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

9

American Monertra, Inc. AVENEG, INC

American National Petroleum Company PATRICK PETROLEUM CO.

American Nat'l Gas Production SANDRIDGE ENERGY, INC.

American Natural Energy Corp. SANDRIDGE ENERGY, INC.

American Natural Gas Production Co. EL PASO E&P COMPANY, LP

American Net Profits Partnership - VII Ltd. see Dominion Exploration & Production

American Oil Co 1961 BP AMERICA

American Oil Co. of Texas 1952 EXXON MOBIL CORP.

American Pacific International 1979 PETRO LEWIS CORP.

American Pacific, Int'l (API) HESS CORPORATION

American Petrofina Co. of Texas 1985 TOTAL E&P USA INC

American Petrofina Expl. Co. 1994 TOTAL E&P USA INC

American Petrofina Foundation 1990 TOTAL E&P USA INC

American Petrofina Marketing Inc. 1985 TOTAL E&P USA INC

American Petrofina Pipeline Company ALON USA LP

American Petrofina, Inc. 1991 TOTAL E&P USA INC

American Petroleum HESS CORPORATION

American Producing Properties Co. see Dominion Exploration & Production

American Production Partnership LTD II, etc see Dominion Exploration & Production

American Quasar Petroleum Co. 1987 UNIT CORP. CO.

American Republic Corp. 1954 BP AMERICA

American Reserve Corporation see Dominion Exploration & Production

AMERICAN RESOURCES INC.

American Royalty Trust 1987 FREEPORT-MCMORAN ENERGY PTNRS

Ameriplor Corp. see Dominion Exploration & Production

Ameritrus Petroleum Corporation JP MORGAN CHASE & CO

Ameritrust Texas, N.A. JP MORGAN CHASE & CO

Amerox Acquisition Corp. see Dominion Exploration & Production

Amex 1980, Ltd. see Dominion Exploration & Production

Amex 1981, Ltd. see Dominion Exploration & Production

Amex 1982, Ltd. see Dominion Exploration & Production

Amex 1983, Ltd. see Dominion Exploration & Production

Amex Oil Company see Dominion Exploration & Production

Amex Production Partnership Ltd. see Dominion Exploration & Production

Amherst Coal Co. 1981 MAXUS ENERGY CO.

Aminoil Dev. Inc. BURMAH OIL & GAS CO.

Aminoil USA Inc. 1984 CONOCOPHILLIPS

Amkam Acquistion Corp. see Dominion Exploration & Production

Amoco Canada Petro Co. Ltd. BP CANADA

Amoco Corp. BP AMERICA

Amoco Production Co. MIDWEST OIL CORP & PANAM PET

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

10

Amoco Production Co. BP AMERICA

AMPCO Corporation 1977 TOTAL E&P USA INC

Ampeco 1976-1 Ltd. BROCK EXPLORATION CORPORATION

Ampeco 1980-1 Ltd. BROCK EXPLORATION CORPORATION

Amquest Corp. 1985 BROCK EXPLORATION CORPORATION

Amtane, Inc. BURMAH LP GAS INC.

Amtexas (Natural Gasoline) WARREN AMERICAN OIL CO.

ANADARKO E&P COMPANY, LP

ANADARKO PETROLEUM CORPORATION

Anadarko Production Corp. 1985 ANADARKO PETROLEUM CORPORA-

Anchor Exploration Co. KERR-MCGEE CORP

Anchor Oil & Gas Co. 1917 CONOCOPHILLIPS

Ancon Partnership, Ltd. see Dominion Exploration & Production

ANDERMAN OPERATING CO., INC.

Anderman/Smith Operating Co. ST. MARY LAND & EXLORATION CO.

Anderson & Kerr KERR-MCGEE CORP

Anderson Exploration, Ltd (Canada) DEVON ENERGY CORP.

Anderson Oil Co. CHESAPEAKE ORC, LLC

Anderson Summit Inc. 1986 DERRICK PETROLEUM INC.

Anderson-Prichard BURLINGTON RESOURCES

Andover Oil Co. 1982 SANTA FE MINERALS, INC.

Anderson Oil & Gas, Inc ANDERSON FEAZEL MANAGEMENT,

ANDREW OIL AND GA PARTNERSHIP

Andrew Oil and Gas Royalties, Inc. ANDREW OIL AND GAS PARTNERSHIP

Andrews Petroleum Corp. 1924 FOREST OIL CORP.

ANDREWS PRODUCTION CO.

Anglo Energy Ltd. 1983 ROSEWOOD RESOURCES INC.

ANM Services Corp. see Dominion Exploration & Production

Annie R. Bass Grandson's Trust fbo Sid ARBGT (SRB) O&G TX (WY)(LA)(MULTI-

Annie R. Bass Grandson's Trust fbo Lee ARBGT (LMB) O&G TX (WY)(LA)(MULTI-

Annie R. Bass Grandson's Trust fbo Rob ARBGT (RMB) O&G TX (WY)(LA)(MULTI-

ANR Production Co. 1985 EL PASO E&P COMPANY, LP

Anschutz Oil Co. Inc. 1970 ANSCHUTZ CORP., INC.

Anson Corporation CHESAPEAKE EXPLORATION LLC

Anson Production Corporation CHESAPEAKE EXPLORATION LLC

Antares Oil 1986 OXFORD CONSOLIDATED, INC.

Antero Resources I, LP XTO ENERGY INC.

Antioch Gathering Company 1992 ANADARKO PETROLEUM CORPORA-

Antioch Texas Gathering Co. 1992 ANADARKO PETROLEUM CORPORA-

ANVIL PETROLEUM CORP.

AOL Holdings, Inc. CHESAPEAKE ORC, LLC

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

11

APACHE CORP.

Apache Corporation 1985 DAVIS OIL CO. (DAVIS PETRO CORP.)

Apache Oil & Gas Corp. DOW CHEMICAL

APCOT_FINADEL Joint Venture 1986 TOTAL E&P USA INC

APD Company 1989 APACHE CORP

APEX OIL CO.

Appalachian Expl. Inc. GREAT LAKES ENERGY PTRS, LLC

APX Corporation 1992 ANADARKO PETROLEUM CORPORA-

APX Western Corporation 1992 ANADARKO PETROLEUM CORPORA-

Aquilla Energy Resources BLACK HILLS ENERGY

Arcadia Resources, LP DORCHESTER RESOURCES, LP

Arch Mineral Corp. 1969 ASHLAND OIL INC.

Arch Oil & Gas Company 1993 WAGNER & BROWN, LTD.

Arch Petroleum, Inc. PLAINS EXPLORATION & PRODUCTION

ARCO Oil & Gas Co. BP AMERICA

Arco Permian Basin BP AMERICA

Ardmore Oil Co. 1917 EXXON CORPORATION

Argent Energy, Inc. 1990 EL PASO E&P COMPANY, LP

Argo Oil Corp. 1961 BP AMERICA

Argo Petroleum 1987 * NATIONAL FUEL GAS CO.

Argonaut Energy Corporation BROCK EXPLORATION CORPORATION

Argus Production Co. HESS CORPORATION

Arkansas Fuel Oil Corp. OCCIDENTAL OIL & GAS CORPORATION

Arkla Exploration 1993 DEVON ENERGY

Arkla Inc. CENTERPOINT ENERGY, INC.

Arkoma Holding LLC XTO ENERGY INC.

Arkoma Pittsburg Holding Corporation CHESAPEAKE EXPLORATION LLC

Arkoma Production Co. 1994 DEVON ENERGY

Arrowhead 1969 APACHE CORP.

Arrowhead Energy Corp. RELIANCE ENTERPRISES, INC.

ARROWSTONE PETROLEUM CORP.

ARS CONTROL ACCOUNT LP managed by AVIVA

Artex Exploration Company DEVON ENERGY

Asamera, Inc. 1988 GULF CANADA RESOURCES LTD.

ASCA LTD. managed by AVIVA

Ashland Exploration Company ASHLAND OIL, INC.

Ashland Oil & Refining Co. ASHLAND OIL, INC.

ASHLAND OIL INC.

Ashland Oil, Inc. 1979 * PIONEER NATURAL RESOURCES USA,

Associated Natural Gas Corp. DUKE ENERGY FIELD SERVICES

Aswell Inc. 1970 TOTAL E&P USA INC

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

12

Atapaz Petroleum, Inc. 1979 WAINOCO OIL CORP.

Atlantic Refining Co. 1966 BP AMERICA

Atlantic Richfield Co. BP AMERICA

Atlas Corporation 1958 TOTAL E&P USA INC

Auora Gasoline Co. 1959 MARATHON OIL COMPANY

Aus-Tex Oil & Royalty Corp. 1975 HOUSTON OIL & ENERGY, INC.

Austral Oil Co. 1978 * EXXON MOBIL CORP.

Austral Oil Co., Inc. 1982 see Dominion Exploration & Production

Avance Oil & Gas Co. ANADARKO E&P COMPANY, LP

Avanti CHESAPEAKE

AVEN GAS & OIL, INC.

Aviara Energy Corporation XTO ENERGY INC.

AVIVA, INC.

AX Acquisition Corp. see Dominion Exploration & Production

Axcon Corp. see Dominion Exploration & Production

Axem Energy Co. KERR-MCGEE CORP

Axem Resources Incorporated KERR-MCGEE CORP

Axem-Blackbird LLC KERR-MCGEE CORP

Axem-Bluebell LLC KERR-MCGEE CORP

Axem-JCEC LLC KERR-MCGEE CORP

Axem-Production LLC KERR-MCGEE CORP

Axroyalty, Inc. KERR-MCGEE CORP

AZL Resources 1983 TOSCO CORP.

Aztec Energy Corp. 1984 WICHITA RIVER OIL CO.

Aztec Oil and Gas Co. 1976 CONOCOPHILLIPS

Aztec Resources Corp. 1985 WEPCO ENERGY CO.

B & A Pipe Line Company 1941, The Henderson Clay Products, Inc.

B & B Drilling 1965 EXXON MOBIL CORP.

B & N Petroleum, Inc. 1988 ANADARKO E&P COMPANY, LP

B.E. Oil and Gas Company BROCK EXPLORATION CORPORATION

BALBOA EXPLORATION CO.

Balco Energy PLAINS RESOURCES, INC.

Baldridge & King ANADARKO E&P COMPANY, LP

Ballard & Cordell PLAINS RESOURCES, INC.

Bankline Oil Co. 1959 CONOCOPHILLIPS

Barber Oil Exploration Corp. 1981 FREEPORT-MCMORAN ENERGY PTNRS

Barber Oil Reserves 1965 BP AMERICA

Barfield Oil Corp. 1989 EVERGREEN OPERATING CORP.

Bargo Energy Corp. PETROHAWK PROPERTIES, LP

Barnsdall Oil Co. 1949 SUNOCO PARTNERS MKTG & TERM-

Barnett Resources Corp WILLIAMS PRODUCTION RMT. CO.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

13

Baron Minerals LP LINN ENERGY HOLDINGS LLC

Baron Minerals Management LLC LINN ENERGY HOLDINGS LLC

Barron Surface Estates LLC LINN ENERGY HOLDINGS LLC

BARTELL EXPLORATION

Baruch-Foster Corp. APACHE CORP.

Basics Oil & Gas Inc. LONGVIEW ENERGY COMPANY

Basin Oil Company THE WISER OIL CO.

Basin Petroleum Corp. 1980 CHEVRON CORP

Bass Enterprises Production Company BEPCO, L.P.

BASS PARTNERSHIP

Bates Oil Corp. LASMO ENERGY CORP.

Bay Petroleum 1955 see Tenneco Inc

Bayard Drilling Technologies, Inc. NABORS DRILLING USA, LP

Bayard Drilling, LLC NABORS DRILLING USA, LP

Bayou Resources, Inc. 1987 NEWFIELD EXPLORATION MID-

Bayou Resources, Inc. 1987 UNIT PETROLEUM CORP. (50%)

Bayview Petroleum EXXON MOBIL CORP.

BBX Oil Corporation GLADSTONE ROYALTIES LLC

Beacon Exploration Co. TOKLAN OIL AND GAS CORPORATION

Beacon Oil Co. 1981 ENERGY SOURCES INC.

Bear State Oil Co. 1928 MARATHON PETROLEUM CO.

Beard & Hammond JGM COMPANY

Beard Oil Co. 1988 ANADARKO E&P COMPANY, LP

Beard Oil Company SENSOR OIL & GAS, INC.

Beardmore Oil Inc. 1973 CONOCOPHILLIPS

Beau Coup Oil & Gas Corp. 1986 GREAT RIVER OIL & GAS CORP.

Belcher Oil Co. 1977 EL PASO E&P COMPANY, LP

Belco Development Co 1983 EOG RESOURCES, INC.

Belco Energy Corp. 2001 KERR-MCGEE OIL & GAS ONSHORE, LP

Belco Energy I, LP KERR-MCGEE OIL & GAS ONSHORE, LP

Belco Oil & Gas 1983 EOG RESOURCES, INC.

Belco Oil & Gas 2001 (different company) KERR-MCGEE OIL & GAS ONSHORE, LP

Belco Petroleum Co. 1983 EOG RESOURCES, INC.

Belco Petroleum North America, Inc. EOG RESOURCES, INC.

Belco Wyoming Corporation EOG RESOURCES, INC.

Belcor, Inc SILVER ASSETS, INC

BELDEN & BLAKE ENERGY CO.

Bell Petroleum Co. 1975 * PACIFIC ENTERPRISES OIL CO. (USA)

Bellwether Exporation Co. PETROHAWK PROPERTIES, LP

BelNorth Energy Corporation EOG RESOURCES, INC.

BelNorth Petroleum Co. 1986 EOG RESOURCES, INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

14

Belridge Oil Co. 1979 Shell Oil Co.

Benedum-Trees Oil Co. 1982 KERR-MCGEE CORP.

BeneTex 88, Ltd. KERRCO INC.

BeneTex Oil and Gas Ltd. KERRCO INC.

BENGAL OIL & GAS

Benjamin F. Hackett, P.C. BENJAMIN F. HACKETT & ASSOCIATES

Berea Oil & Gas Corp. 1985 ENERVEST MANAGEMENT PARTNERS

Berkshire Oil Co. 1961 FRANKEL OIL & GAS CO.

Berexco Inc. MANUEL CORPORATION

Beta Operating Co., LLC PETROHAWK PROPERTIES, LP

BHP PETROLEU (AMERICAS) INC.

Big Dipper Oil Co. 1919 ASHLAND OIL INC.

Big Five Oil Corp. 1985 ARROWSTONE PETROLEUM CORP.

Big Piney Oil & Gas Co. SANDRIDGE ENERGY, INC.

Big Piney Oil & Refining Co. 1955 SANDRIDGE ENERGY, INC.

Bigheart Pipeline Company (see Koch Oil)

Bishop Oil Co. 1961 Shell Oil Co.

Bison Energy Corp PLAINS EXPLORATION & PRODUCTION

Bison Production Company PLAINS EXPLORATION & PRODUCTION

BK Energy Company BK EXPLORTION CORP.

B-L ASSOCIATES

BLACK BEAR LP managed by AVIVA

Black Hawk Resources Corp OXFORD CONSILIDATED, INC.

BLACK HILLS GAS RESOURCES, INC.

Black Jack Resources, Inc. ANADARKO E&P COMPANY, LP

BLACK TYPE LP managed by AVIVA

Blackbird Co. (DISSOLVED) KERR-MCGEE CORP

Blackfoot-Cherokee Energy, Inc. 1981 PLAINS PETROLEUM CO.

Blackgold Energy Resources Inc. 1987 SNYDER OIL PARTNERS LP

Blackhawk Drilling Co. 1931 KERR-MCGEE CORP.

Blackhawk Oil Co. PETROHAWK PROPERTIES, LP

BLACKSTONE MINERALS CORP.

Blaffer & Farish 1917 EXXON MOBIL CORP.

BlaMaCa Resources, Ltd. KERRCO INC.

Blanco Oil Co. DALEN RESOURCES OIL & GAS CO.

Bloomfield Royalty Corp. TEXON ENERGY CORP.

BLUE FOX ROYALTY LP managed by AVIVA

Bluebird Investment Company 1948 TOTAL E&P USA INC

BMC Development #1, LP PETROHAWK PROPERTIES, LP

BN Financial Services, Inc.

BN Geothermal, Inc CONOCOPHILLIPS

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

15

BN Leasing, Inc CONOCOPHILLIPS

BNI Energy CONOCOPHILLIPS

BNL Development Corp. CONOCOPHILLIPS

Bodcaw Oil Properties 1979 PLACID OIL CO.

Bogert Oil Co. DOMINION OKLA TEXAS EXPL & PROD.

Bois D'Arc Energy Inc STONE ENERGY CORPORATION

Bolero Energy Corp. 6/89 KAISER-FRANSIS OIL COMPANY

BOLTEX OIL & GAS CO.

Bomac Exploration Co. 1975 SAMSON PROD SERVICES COMPANY

BONANZA PETROLEUM, INC.

Bonanza Resources, Inc. 1984 PLAINS PETROLEUM CO.

Bonnville Fuels Corp. EVERGREEN RESOURCES, INC.

Bonray Driling Corp. NABORS DRILLING USA, LP

Boomer Marketing Corp. SANDRIDGE ENERGY, INC.

BORDER EXPLORATION CO.

Boston-Wyoming Oil Co. 1928 CONOCOPHILLIPS

Boswell Corp. SAMSON PROD SERVICES COMPANY

Boundary Acquisition, Inc. see Dominion Exploration & Production

Boundry Oil Co. see Dominion Exploration & Production

Boundry Properties, Inc. see Dominion Exploration & Production

BOUNTY PRODUCTION CO.

Boyd Oil Corp. 1924 FOREST OIL CORP.

BP AMERICA

BP Exploration & Production Inc. BP AMERICA

BP Exploration 1990 TEXICON OIL & GAS CO.

Bracell Petroleum MURPHY OIL CORP.

Bracken Exploration DIVERSIFIED ENERGIES, INC.

Bradco Oil & Gas Co. NIKLOS OIL & GAS CO.

Bradley Producing Corp. 1984 HESS CORPORATION

Bradley Resources HESS CORPORATION

Bradmar Petroleum Corp. SANDRIDGE ENERGY, INC.

Brammer Supply (O&G Div) HEP OIL CO LTD

Brandywine Oil BP AMERICA

Brayton Land 1989 AMAX Coal Company

Bravo Natural Resources Inc. CHESAPEAKE EXPLORATION LLC

Brazos Coal, Ltd. THOUSAND OAKS DEV. CO. JT. VEN.

Brazos Exploration Co. GOLIAD OPERATING COMPANY

Brazos Oil & Gas Co. DOW CHEMICAL CO.

Brazos Production Co. GOLIAD OPERATING COMPANY

Brazos Young Corp. 1989 TENKAY RESOURCES INC.

BRECKENRIDGE OPERATING CO.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

16

Brewer Oil & Gas Co. HESS CORPORATION

BRG Petroleum Inc. 1998 DEVON ENERGY PROD. CO, LP

BRG Petroleum Corp. 2005 CHESAPEAKE ENERGY CORP.

BRG ENERGY INC.

Bridewill & Darsey DARSEY OIL CO.

Bridge Oil (USA) Inc. PARKER & PARSLEY DEVELOPMENT

Bridge Oil Company PARKER & PARSLEY DEVELOPMENT

Bridge Oil Company, L.P. PARKER & PARSLEY DEVELOPMENT

Bridge Oil Production Company PARKER & PARSLEY DEVELOPMENT

Bridger Exploration Inc 1984 OXFORD CONSILIDATED, INC.

Bridger Petroleum Corp 1978 PRESDIO OIL CO.

Brigham Exploration STATOIL

Brighton Acquisitions Company LLC CHESAPEAKE EXPLORATION LLC

Brinson & Colline UNITED PRODUCTION

British American Oil Producing Co. 1956 DALEN RESOURCES OIL & GAS CO.

BRITISH PETROLEUM CO. PLC

Britoil PLC 1987 * see Dominion Exploration & Production

Britoil PLC 1988 BRITISH PETROLEUM CO. PLC

Britoil U.S. Holdings Inc. see Dominion Exploration & Production

Britoil Ventures, Inc. HIGHMOUNT EXPLORATION & PRODUC-

Brittany Petroleum Ltd Company CHESAPEAKE EXPLORATION LLC

BROCK EXPLORATION CORPORATION

Brock Gas Systems, Inc. BROCK EXPLORATION CORPORATION

Brock Hydrocarbons, Inc. BROCK EXPLORATION CORPORATION

Brock Oil and Gas Corporation BROCK EXPLORATION CORPORATION

Brock Oil Corporation BROCK EXPLORATION CORPORATION

Brock Production Corporation BROCK EXPLORATION CORPORATION

Brock Resources, Inc. BROCK EXPLORATION CORPORATION

Broken Arrow Royalty Co TOKLAN OIL AND GAS CORPORATION

Brookhaven ENERGEN RESOURCES CORP.

Brookhaven Oil Co. 1979 DALEN RESOURCES OIL & GAS CO.

Brooks Hail Oil Co. 1984 SANDRIDGE ENERGY, INC.

Brown Seal Oil Corp. 1924 FOREST OIL CORP.

Brunner ENGELKE

Bryson Oil & Gas Corp. 1988 CASPEN OIL, INC.

BTU Operating Co. 1986 ENEX RESOURCES CORP.

Buckhorn Petroleum Co. 1984 MCN EXPLORATION

Buckhorn Petroleum Co. 1986 APACHE CORP.

Buffalo Oil Co. 1958 CONOCOPHILLIPS

Buffalo Oilfield Ser. Inc. GREAT LAKES ENERGY PARTNERS LLC

Bunker Exploration, Inc. 1984 CHAPMAN ENERGY INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

17

Burkhard Petroleum Corp. 1987 ZG ENERGY CORP.

Burlington Northern Oil & Gas Div. CONOCOPHILLIPS

Burlington Northern Petroleum Inc. CONOCOPHILLIPS

Burlington Resources Oil & Gas Co, LP CONOCOPHILLIPS

Burmah Oil & Gas Co. 1976 * CONOCOPHILLIPS

Bush Exploration 1982A-Ltd. CABOT OIL & GAS CORP.

BUTTES OIL & GAS CO.

Byrd Oil Corp. EXXON MOBIL CORP.

C & K Petroleum, Inc. 1980 UNIMAR CORP.

C.F. Braun Co. 1980 SANTA FE MINERALS, INC.

C.J. Wrightsman W.A. MONCRIEF

C.U. Bay see Tenneco Inc

C.V. Lyman Shell Oil Co.

C.J. Wrightsman W.A. MONCRIEF, JR.

Calco 1961 CHEVRON CORP

California Co. 1961 CHEVRON CORP

California Oil Co. 1977 CHEVRON CORP

California Oilfields, Ltd. 1913 Shell Oil Co.

California Petroleum Corp. 1928 CHEVRON CORP

CALLON PETROLEUM CO.

Calpine Corporation ROSETTA RESOURCES INC

Calpine Natural Gas Co. ROSETTA RESOURCES INC

Calplans Oil & Gas Corp. MISSION RESOURCES PARTNERS LP

CALUMET LUBRICANTS CO.

Calumet Oil Co. CHAPARRAL ENERGY INC.

Calvert Exploration Co. 1975 SUNOCO PARTNERS MKTG & TERM-

Calvin Petroleum Corp. 1985 ENERGY OIL, INC.

Cambridge Related Assets, Inc. GLOBAL NATURAL RESOURCES CORP.

Cambridge Royalty Co. 1986 GLOBAL NATURAL RESOURCES CORP.

Cameron Meadows Land Co. 1978 SANTA FE MINERALS, INC.

Camroy Acquisition Corporation GLOBAL RESOURCES CORP

Camroy Acquisition, Inc. GLOBAL RESOURCES CORP

Canaan CHESAPEAKE KNAN ACQUISITION, LLC

Canterra Energy Ltd. HUSKY OIL LTD.

Canterra Petroleum, Inc. 1988 DANOV CORPORATION

Canterra Petroleum, Inc. 1988 DABROS PROPERTIES, INC.

Canusa Energy, Inc. 1984 PLAINS PETROLEUM CO.

Canyon Energy, Inc. 1993 WAGNER & BROWN, LTD.

Capital Fina Oil Company Inc. 1979 TOTAL E&P USA INC

Capitan, Inc. E.E. NEARBURG

Capitol Fina Pipeline Company 1985 TOTAL E&P USA INC

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

18

Carbon Energy Corp. USA PIONEER NATURAL RESOURCES USA,

Cardinal Petroleum Co. CONOCOPHILLIPS

Caribou Four Corners 1984 HEADINGTON INVESTMENTS, INC.

Carl Oil & Gas 1988 MCFARLAND ENERGY, INC.

Carlin Oil & Gas Co. KAISER-FRANCIS OIL COMPANY

Carolina Oil & Gas OCCIDENTAL OIL & GAS CORPORATION

Carper Drilling MCFARLAND ENERGY, INC.

Carr Oil Co. SUNOCO PARTNERS MKTG & TERM-

Cartel Inc. 1988 WASHITA PRODUCTION CO.

Carter Oil Co. 1959 EXXON MOBIL CORP.

Cascade CHEVRON CORP

Case-Pomeroy Oil Corp. 1952 * FELMONT OIL CORP.

Casex Co. HESS CORPORATION

CASTLE ENERGY CORP. 1985

CATAMOUNT ROYALTY PARTNERS, LTD. managed by AVIVA

CAVENHAM ENERGY RESOURCES

Cayman Corporation CAYMAN RESOURCES CORPORATION

Cayman Exploration Corporation CAYMAN RESOURCES CORPORATION

CAYMAN RESOURCES CORP.

CDC Ada, Inc. SUNDOWN ENERGY INC.

CEI Bristol Aquisitions CHAPARRAL ENERGY INC.

Celeron Corp. 1987 CHEVRON CORP

Celeron Corp. 1987 EXXON MOBIL CORP.

Celsius Energy Company QUESTAR EXPLORATION AND PRO-

Cenaro Oil & Gas CHEVRON CORP

Cenergy Corporation see Dominion Exploration & Production

Cenergy Exploration Co. see Dominion Exploration & Production

Cenergy Financial Corporation see Dominion Exploration & Production

Cenergy International Company see Dominion Exploration & Production

Cenergy Midwest Company see Dominion Exploration & Production

Cenergy Transmission Company see Dominion Exploration & Production

CENEX, INC.

Centex Oil & Gas, Inc. CONQUEST EXPLORATION CO.

Central Louisiana Energy Corp. 1982 EXXON MOBIL CORP.

Central Oil & Gas, Inc. ANADARKO E&P COMPANY, LP

Central-Del Rio Oils Ltd. PANCANADIAN PETROLEUM CO.

Centura Energy Corp. 1983 CASTLE ENERGY CORP.

Century Oil & Gas 1987 CHARTERHALL PLC

Century Production, Inc. 1986 HESS CORPORATION

CF Industries, Inc. 1987 * KELLEY OIL CORP.

Chalaco, Ltd. (Dissolved) KERR-MCGEE CORP

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

19

Chambers & Kennedy UNIMAR CORP.

Champlin Oil & Refining Co. 1964 ANADARKO E&P COMPANY, LP

Champlin Petroleum Co. 1987 ANADARKO E&P COMPANY, LP

Chanslor Western Oil/Dvlpmt. Co. 1978 DEVON ENERGY

Chanslor-Canfield 1953 DEVON ENERGY

Chaparral Energy Development Corp. 1980 NUGGET OIL CORP.

CHAPARRAL ENERGY, LLC

Chaparral Oil Inc. CHAPARRAL ENERGY INC.

Chapman Energy Inc. CODA ENERGY CORP.

CHAPMAN RESOURCES

CHARLIE BARTON

Charter Exploration & Production 1977 CRYSTAL OIL CO.

CHARTERHALL PLC

Chase Petroleum Co 1968 APACHE CORP.

Cheniere Petroleum Corp. DEVON ENERGY

Cherokee Resources, Inc. PETROHAWK PROPERTIES, LP

Cherryville Corp. TEXAS INTERNATIONAL PETROLEUM

Chesapeake BNR Corp CHESAPEAKE EXPLORATION LLC

Chesapeake Cratex Corp CHESAPEAKE EXPLORATION LLC

Chesapeake Cratex LLC CHESAPEAKE EXPLORATION LLC

CHESAPEAKE ENERGY CORP.

Chesapeake ENO Acquisitions LLC CHESAPEAKE EXPLORATION LLC

Chesapeake EP LLC CHESAPEAKE EXPLORATION LLC

Chesapeake Focus LLC CHESAPEAKE EXPLORATION LLC

Chesapeake GH Corp CHESAPEAKE EXPLORATION LLC

Chesapeake Investments ARCADIA RESOURCES, L.P.

Chesapeake KNAN Acquisitions LLC CHESAPEAKE EXPLORATION LLC

Chesapeake LNG LP CHESAPEAKE EXPLORATION LLC

Chesapeake Mid- Continent Corp. CHESAPEAKE EXPLORATION LLC

Chesapeake Mountain Front LLC CHESAPEAKE EXPLORATION LLC

Chesapeake ORC, LLC CHESAPEAKE EXPLORATION LLC

Chesapeake PEP Corp. CHESAPEAKE EXPLORATION LLC

Chesapeake PRH Corp CHESAPEAKE EXPLORATION LLC

Chesapeake Permian LP CHESAPEAKE EXPLORATION LLC

Chesapeake RS Corp. CHESAPEAKE EXPLORATION LLC

Chesapeake Sigma LP CHESAPEAKE EXPLORATION LLC

Chesapeake Zapata LP CHESAPEAKE EXPLORATION LLC

CHK Cratex LLC CHESAPEAKE EXPLORATION LLC

CHK Louisiana LLC CHESAPEAKE EXPLORATION LLC

Chessie Resources, Inc. Minerals Only ENERGEN RESOURCES CORP.

Chevron Midcontinent CHEVRON CORP

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

20

Chevron Production Company CHEVRON CORP

Chevron USA CHEVRON CORP

Chevron-Texaco CHEVRON CORP

Chicago Corp. 1954 ANADARKO E&P COMPANY, LP

Chief Holdings, LLC DEVON ENERGY

Chief Oil & Gas LLC DEVON ENERGY

Chieftain Petroleum, Inc. 1986 UMC PETROLEUM CORP.

Chinook Resources BRIDGE OIL COMPANY, L.P.

Chipola Oil Corp. 1982 TERRAPET ENERGY CORP.

Chisos Trading Co. KAISER-FRANCIS OIL CO.

Christie, Mitchell & Mitchell Co. DEVON ENERGY

CIG Exploration, Inc. EL PASO E&P COMPANY, LP

CIMA Energy, Ltd. CIMA ENERGY, LP

Cimarron Operating Company RANGE RESOURCES - APPALACHIA,

CINCO GENERAL PARTNERSHIP

Circle X Oil and Gas LLC CHESAPEAKE EXPLORATION LLC

Cisneros Oil Corporation 1967 TOTAL E&P USA INC

Citation 1987 Investment LP CITATION 2002 INVESTMENT LP

Citation 1989 Investment LP CITATION 2002 INVESTMENT LP

Citation 1998 Investment LP CITATION 2002 INVESTMENT LP

CITATION 2002 INVESTMENT LP

Citation 1994 Investment LP CITATION 2002 INVESMENT LP

Citgo Petroleum Corp. Pre 9/83 OCCIDENTAL OIL & GAS CORPORATION

CITGO PETROLEUM CORPORATION

Cities Service Oil & Gas Corp. OCCIDENTAL OIL & GAS CORPORATION

Cities Services Oil Co. 1982 OCCIDENTAL OIL & GAS CORPORATION

Citrus County Land Bureau, Inc. HESS CORPORATION

Clark Oil & Refining Co. APEX OIL CO.

Clark Resources, Inc. 1989 BRG PRODUCTION CO.

Clarkland Royalty, Inc. CONOCOPHILLIPS

Clarkland, Inc. CONOCOPHILLIPS

Classic Oil & Gas, Inc. XTO ENERGY INC.

Classic Petroleum, Inc. XTO ENERGY INC.

Clayton Williams Energy, Inc. (CWI) NBL PERMIAN LLC

Clusde R Lambe KOCH EXPLORATION COMPANY, LLC

Clephane Oil Co. 1912 Shell Oil Co.

Cliffwood Energy Co. 1988 CHEVRON

CLINTON GAS SYSTEMS, INC.

Clinton Oil Co. 1976 BHP PETROLEUM (AMERICAS) INC.

Clymore Petroleum Corp. 1968 TESORO PETROLEUM CORP.

CMS ENEGY, INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

21

CMS Nomeco Oil & Gas NEWFIELD EXPL MID-CONTINENT INC.

CNG Producing Co. see Dominion Exploration & Production

COAL CREEK EXPLORATION COMPANY managed by AVIVA

Coastal Derby Refining Company EL PASO MARKETING, INC.

Coastal Oil & Gas Corp. EL PASO E&P COMPANY, LP

Coastal Oil & Gas Gathering, LP EL PASO E&P COMPANY, LP

Coastal Oil & Gas USA, LP EL PASO E&P COMPANY, LP

Coastal Oil Co. 1958 CONOCOPHILLIPS

Coastal Production Co. EOG RESOURCES, INC.

Coastal Refining and Marketing EL PASO MARKETING

Coastal States Crude Gathering Co. EL PASO MARKETING

Coastal States Gas Production Co. EL PASO E&P CO., LP

Coastal States Trading, Inc. EL PASO MARKETING

Cobo & Co, Inc. TOKLAN OIL AND GAS CORPORATION

Coda Energy EOG RESOURCES, INC.

CoEnergy Anadarko, Inc. SUNDOWN ENERGY INC.

CoEnergy Central Expl. Inc. SUNDOWN ENERGY INC.

CoEnergy Enhanced Prod. Co. SUNDOWN ENERGY INC.

CoEnergy Midcontinent, Inc. SUNDOWN ENERGY INC.

CoEnergy Operating Co. SUNDOWN ENERGY INC.

CoEnergy Ventures, Inc. SUNDOWN ENERGY INC.

COFFEYVILLE RESOURCES, LLC

Coline Gasoline Corp. 1977 DEVON ENERGY

Coline Oil Corp. 1977 DEVON ENERGY

Colonial Oil Productions Co. 1966 TOTAL E&P USA INC

Colorado Oil & Gas Corp. 1973 EL PASO E&P CO., LP

Colorado Oil Co., Inc. EL PASO E&P CO., LP

Colorado Western Exploration, Inc. 1958 CONSILIDATED OIL & GAS, INC.

Colt Intermodal Inc. CONOCOPHILLIPS

Coltexo Corp. OCCIDENTAL OIL & GAS CORPORATION

Columbia Gas Development Corp. HUNT ENERGY (AEC), INC.

COLUMBIA NATURAL RESOURCES LLC

Columbian Carbon Co. 1963 OCCIDENTAL OIL & GAS CORPORATION

COLUMBINE I LP managed by AVIVA

COLUMBINE II LP managed by AVIVA

Cometra Oil & Gas Co. RANGE RESOURCES INC.

Commodore Estates, Inc. GREAT LAKES ENERGY PARTNERS LLC

Common Parent Corporation CONOCOPHILLIPS

Commonwealth Oil Co. 1961 JUPITER CORP.

Commonwealth Petroleum Co. 1922 Shell Oil Co.

Comprehensive Resources Corp. 1984 DEVON ENERGY

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

22

COMSTOCK RESOURCES, INC.

Concho Oil Co. CHESAPEAKE ORC, LLC

CONDER

Conoco, Inc. CONOCOPHILLIPS

Conquest Associates see Dominion Exploration & Production

Conquest Associates 1983 see Dominion Exploration & Production

Conquest Associates 1985 see Dominion Exploration & Production

Conquest Associates II see Dominion Exploration & Production

Conquest Associates-I Limited see Dominion Exploration & Production

Conquest Associates-II Limited see Dominion Exploration & Production

Conquest Exploration Company see Dominion Exploration & Production

Conquest Texas, Inc. see Dominion Exploration & Production

Conquest Transmission Company see Dominion Exploration & Production

Conquest/N 1982 Limited Partnership see Dominion Exploration & Production

Conquest/N 1985 Limited Partnership see Dominion Exploration & Production

Conquest/N Matagorda LP see Dominion Exploration & Production

Conquest/NM Matagorda LP see Dominion Exploration & Production

Conquest/NWM 1982 Texas Oil & Gas LP see Dominion Exploration & Production

Conquest/NWM Texas Oil & Gas see Dominion Exploration & Production

Conquest/P 1982 Limited Partnership see Dominion Exploration & Production

Conquest/P 1985 Limited Partnership see Dominion Exploration & Production

Conquest/P Matagorda Limited Partnership see Dominion Exploration & Production

Consolidated Gas Supply Corp. see Dominion Exploration & Production

Consolidated Natural Gas see Dominion Exploration & Production

Consilidated Oil & Gas Inc HUGOTON ENERGY CORP.

Consolidated Oil Corp. 1943 BP AMERICA

Consolidated Oil/Gas Acquisition Co. 1990 CONSILIDATED OIL & GAS, INC.

Consolidated Production FREEPORT-MCMORAN ENERGY PTNRS

Consolidated Rimrock Oil Corp. 1958 CONSOLIDATED OIL & GAS, INC.

Continental Eastern Corp. CHEVRON CORP

Continental Oil Co. CONOCOPHILLIPS

Continental Resources Corp. CHAPMAN ENERGY INC.

Continental Western Corp. CHEVRON CORP U.S.A. INC.

CONVEST ENERGY CORP.

Cook & Hackett, ttorneys BENJAMIN F. HACKETT & ASSOCIATES

Coquina Oil FREEPORT-MCMORAN ENERGY PTNRS

Coquina Oil Corp. PRIMARY FUELS, INC.

Coquina Oil Corp. 1993 AMERICAN NATIONAL PETROLEUM CO.

Coral Reserves Natural Gas Income Fund CHESAPEAKE KNAN ACQUISITION, LLC

Cornet Oil * CONDER

Coronado Corp. 1941 BP AMERICA

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

23

Corpus Christi Oil & Gas Co. DALEN RESOURCES OIL & GAS CO.

CORTEX OPERATING CO.

Cortez Operating Co. ENCORE OPERATING, LP

Cosden Oil & Chemical Co. 1985 TOTAL E&P USA INC

Cosden Oil Co. 1932 CONOCOPHILLIPS

Cosden Petroleum Corp. 1963 TOTAL E&P USA INC

Cosden Pipe Line Company 1994 FINA PIPE LINE CO.

COSDEN, INC.

Coseka Resources (USA) Limited WAGNER & BROWN, LTD.

Cotton Petroleum 1986 APACHE CORP.

Cotton Petroleum Corp. 1987 MORAINE PRODUCTION LTD.

Coty LARIO OIL & GAS CO.

Cow Gulch Oil Co. 1973 K.R.M. PETROLEUM CORP.

COX & PERKINS EXPLORATION, INC.

COX OIL & GAS, INC.

CPC Exploration Co. 1985 COX & PERKINS EXPLORATION, INC.

CRA Inc FARMLAND INDUSTRIES, INC.

CRA International, Ltd. GLOBAL NATURAL RESOURCES CORP.

Crainfill & Reynolds 1933 EXXON MOBIL CORP.

Cravens Oil Co. XTO ENERGY INC.

CREDO PETROLEUM CORP.

CRESCENT OIL & GAS CORP.

Crescent Petroleum Corp. CRESCENT OIL & GAS CORP.

Crescent Royalty Co. 1931 CONOCOPHILLIPS

Creslenn Oil Co. 1979 SOUTHWEST ROYALTIES, INC. U.S. OIL

Crestmont Oil & Gas Co. 1981 OCCIDENTAL OIL & GAS CORPORATION

Crimson Energy J-M HUBER CORP.

CRIMSON EXPLORATION INC

Cross Bell Company HAMPTON RESOURCES

Cross Timbers Oil Company XTO ENERGY INC.

Cross Timbers Oil Company LP XTO ENERGY INC.

Cross Timbers Operating Co. XTO ENERGY INC.

Cross Timbers Production XTO ENERGY INC.

Crow Creek Energy, LLC PENN VIRGINIA CORP.

Crow Creek Energy II, LLC EAGLE ROCK MID-CONTINENT ASSET,

CROWN CENTRAL PETROLEUM CORP.

Crown Zellerbach (Energy Div.) 1985 CAVENHAM ENERGY RESOURCES

Crusader Energy Corporation ENCORE OPERATING, LP

CRYSTAL OIL CO.

CSX Oil & Gas Corp. 1988 ENERGEN RESOURCES CORP.

Cudahy Refining Co. BP AMERICA

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

24

Cuervo Resources, Inc. CUERVO, INC.

CUERVO, INC.

Cullen BURLINGTON RESOURCES

Cummins & Walker Oil Co., Inc. DALEN RESOURCES OIL & GAS CO.

CXY Energy Inc. NEXEN PETROLEUM U.S.A. INC.

Cycle Oil & Gas Corp. FRONTIER ENERGY CORP.

Cyclops Corp. 1987 * ROSCOE GAS & OIL CO.

Cypher Energy Corp. ALLIANCE EXPLORATION CORP.

D.C. BINTLIFF

D & D Oil and Gas LLC CHESAPEAKE EXPLORATION LLC

D.D.I., INC 1989

Dabb Energy Company DIAMOND S ENERGY COMPANY

Dabros Properties 1988 JN EXPLORATION & PRODUCTION

DABROS PROPERTIES 1988

Dacresa ENERGEN RESOURCES CORP.

Dakota Resources, Inc. 1983 VALEX PETROLEUM, INC.

Dalco Oil Co. 1976 PACIFIC ENTERPRISES OIL CO. (USA)

Dalen Resources Oil & Gas Co. NEWFIELD EXPLORATION GULF COAST

Dallas Oil & Minerals Inc. RANGE PROD. CO.

Dallas Sunbelt Energy, Inc. 1982 CHAPMAN ENERGY, INC.

Dal-Oil Inc. GREAT LAKE ENERGY PARTNERS LLC

Damson Oil Corp PIONEER NATURAL RESOURCES USA,

Danciger Oil & Refining Co. 1948 BP AMERICA

Daniel Oil Co. PARTNERS OIL CO.

DANOV CORPORATION 1988

Darby Petroleum Co. 1944 SUNOCO PARTNERS MKTG & TERM-

DARSEY OIL CO.

Davis Oil Co. DAVIS PETROLEUM CORP.

Davis Oil Co. (Davis Petroleum Corp.) QUINOCO CO. 1988

Davis Oil Co. 1981 PRESDIO OIL CO.

Dawn Energy Co. 1986 ONEOK EXPLORATION CO.

Dean Brothers BP AMERICA

Deca Energy Corp. 1985 K.R.M. PETROLEUM CORP.

Deep Gas Exploration Inc. 1985 RATEX RESOURCES INC.

Deep Rock Oil Co. 1954 * CONOCOPHILLIPS

Deep Rock Oil Corp. 1955 KERR-MCGEE CORP

DEKALB ENERGY CO.

DeKalb Petroleum Co. 7/92 (Depco) DOMINION OKLA TEXAS EXPL & PROD.

Del Mar Petroleum, Inc. SAMSON PROD SERVICES COMPANY

Del mar Production CONOCOPHILLIPS

Del Ray Petrouelm Co. 1952 see Tenneco Inc

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

25

Delhi Oil Corp. 1955 see Tenneco Inc

Delhi-Taylor Oil Corp. 1964 see Tenneco Inc

Delta Drilling Company KERR-MCGEE CORP

Delta Drilling USA, LP NABORS DRILLING USA, LP

Deltaus Corp. NABORS DRILLING USA, LP

Delwood 1964 APACHE CORP.

Deminex U.S. Oil Co SOUTHWEST ROYALTIES, INC.

DENOVO OIL & GAS CO.

Depco, Inc. DEKALB ENERGY CO.

Derby Refining Company EL PASO MARKETING, INC.

DERRICK PETROLEUM INC.

Desert American Agency, Inc. CONOCOPHILLIPS

Desert Magic Inc. CONOCOPHILLIPS

Desert Royalty Corp (1992) MARIENFELD ROYALTY CORP.

Destry Gas Co., Ltd. PETER PAUL PETROLEUM CO., DEN.

Devex Resources KERR-MCGEE CORP

DEVON ENERGY CORP.

DEVON ENERGY PROD. CO, LP

Devon Louisiana Corp DEVON ENERGY PROD. CO, LP

Devon SFS Operating Inc. DEVON ENERGY CORP.

Devonian Gas & Oil Co. CHEVRON CORP

Devx Energy, Inc. COMSTOCK RESOURCES

DI INDUSTRIES INC.

Diablo Oil Co. 1987 WICHITA RIVER OIL CO.

Daimex Co. ANADARKO E&P COMPANY, LP

Diamond Alkali MAXUS EXPLORATION

Diamond Shamrock Corp. 1987 MAXUS EXPLORATION

Diamond Shamrock Offshore Partners LP CONOCOPHILLIPS

Dickson Oil Company 1949 KAISER-FRANCIS OIL CO.

Dietrich Resources Corp. 1987 SANDRIDGE ENERGY, INC.

Discovery Oil, Ltd. 1986 SEAHAWK OIL INTERNATIONAL, INC.

Diversa, Inc. MAYNARD OIL COMPANY

Diverse Energy Investments FORTUNE NATURAL RESOURCES COR-

Diverse GP FORTUNE NATURAL RESOURCES COR-

Diverse GP III FORTUNE NATURAL RESOURCES COR-

Diverse Operating Company DIVERSE ENERGY INVESTMENTS

DIVERSIFIED ENERGIES, INC.

Dixel Resources, Inc. ANADARKO E&P COMPANY, LP

Dixie Oil Co. 1919 BP AMERICA

DKM Energy Inc. INTERCOAST OIL & GAS CO.

DKM Offshore Energy, Inc. MEDALLION CALIFORNIA PROPERTIES

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

26

DKM Resources, Inc. KCS RESOURCES, INC.

Dodson Prod., LLC PENT ENERGY, LLC

Dolphin Energy LLC NEWFIELD EXPLORATION MID-

Domain Energy Corp RANGE ENERGY CORP.

Domain Energy Finance Corp RANGE ENERGY FINANCE CORP.

Domain Energy Guarantor Corp RANGE ENERGY GUARANTOR CORP.

Domain Energy Prod. Co. RANGE ENERGY VENTURE CORP.

Domain Energy Ventures Corp. RANGE ENERGY VENTURE CORP.

Dome Petr. Corp. (U.S. Assets) 1983 * CHEVRON CORP

Dome Petroleum Ltd. 1988 AMOCO CANADA PETRO CO. LTD

Dominion (offshore) ENI PETROLEUM CO INC.

Dominion Black Warrior Basin, Inc. HIGHMOUNT BLACK WARRIOR BASIN,

Dominion Exploration & Production HIGHMOUNT EXPL AND PROD LLC

Dominion Exploration & Production, Michigan LINN ENERGY, LLC

Dominion Midwest Energy, Inc. HIGHMOUNT EXPL & PROD MICHIGAN

Dominion Midwest Energy, Inc. XTO ENERGY, INC. (all but Michigan)

Dominion Offshore TX & LA ENI PETROLEUM CO INC.

Dominion Oklahoma Texas Exploration & LINN ENERGY, LLC

Dominion Permian, TX HIGHMOUNT EXP & PROD LLC

Dominion Resources, Inc. CONSOL ENERGY INC.

Domionion Rocky Mountian XTO ENERGY

DON FRANTZEN

Don L. Mount BOUNTY PRODUCTION CO.

Donald Slawson Oil Producer SLAWSON EXPLORATION CO., INC.

Dorchester Exploration, Inc. 1984 DAMSON OIL CORP.

Dorfman Production W.H. HEISLER, JR.

Dorothy Corp. 1984 DEVON ENERGY

Dorrance FRAZIER

Double Eagle Exploration, Inc. MKI ENERGY, INC.

DOW CHEMICAL CO.

Dowdle Oil Corp. 1981 WESTERN NATURAL GAS CO.

DPI-GP, Inc. CONOCOPHILLIPS

Drel Petroleum 1979 ORIGINALA PETROLEUM CORP.

DREW CORNELL, INC.

Dreyer Bros., Inc. CONOCOPHILLIPS

Drillers, Inc. 1985 DI INDUSTRIES, INC.

Drillexco 1962 BP AMERICA

Drilling & Exploration Co. 1962 BP AMERICA

DUKE ENERGY FIELD SERVICES

Duke Energy T & T Co. TEPPCO CRUDE OIL LP

Dundee Petroleum Co. 1915 Shell Oil Co.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

27

Duran Energy Corp. 1984 WENTEX INTERNATIONAL, INC.

DX Oil Co. 1962 SUNOCO PARTNERS MKTG & TERM-

Dyco Petroleum Corp. 1985 DIVERSIFIED ENERGIES, INC.

Dynamar Energy Inc. 1986 KERR-MCGEE CORP

Dynamic of Texas, Inc. 1979 CONOCOPHILLIPS

Dynasty Oil & Minerals, Inc. 1984 RANGE PRODUCTION CO. MINERALS,

E.E. Fogelson 1964 Shell Oil Co.

E.E. NEARBURG

E.H. McDermott J.D. WRATHER, JR.

E.L. Hilliard II Interests 1988 COMSTOCK RESOURCES, INC.

E.L. Hilliard III Interests 1988 COMSTOCK RESOURCES, INC.

E.G. Operating SUNDOWN ENERGY, INC.

Eagle Energy Inc. HIGHMOUNT EXPLORATION & PRODUC-

EAGLE EXPLORATION CO.

EAGLE OIL & GAS CO.

Eagle Oil Co. 1978 see Dominion Exploration & Production

Eagle Rock Mid-Continent Asset, LLC EAGLE ROCK ENERGY PARTNERS, L.P.

Earlsboro Oil & Gas 12/90 DOMINION OKLA TEXAS EXPLOR. &

Earnest H. Lambert GLOBAL NATURAL RESOURCES CORP.

Earth Resources Co. 1981 see Dominion Exploration & Production

Eason Oil Co. 1985 EL PASO E&P COMPANY, LP

East Resources Inc. (West Virginia NOT TALISMAN ENERGY USA INC

East Timbers Oil, LP XTO ENERGY, INC.

Eastern Petroleum Co. GREAT LAKES ENERGY PARTNERS LLC

Eastland Oil BP AMERICA

Eastwash Corp. GREAT LAKES ENERGY PARTNERS LLC

Easy Wind Oil Co. 1986 DERRICK PETROLEUM INC.

Echo Oil Corp. 1979 FOREST OIL PERMIAN CORP.

ECOS Corporation CONOCOPHILLIPS

Edson Petroleum Co. 1970 OCCIDENTAL OIL & GAS CORPORATION

Edward P. Bass

Edwards & Leach Oil Co. 1984 SANDRIDGE ENERGY, INC.

Edwin L. & Berry R. Cox COX OIL & GAS INC.

EEX Corp. NEWFIELD EXPLORATION GULF COAST

EGRET ENERGY CORP.

El Can Petroleum Company CONOCOPHILLIPS

El Paso Company CONOCOPHILLIPS (through Burlington

EL PASO E&P CO., LP

El Paso Exploration Co. 1985 CONOCOPHILLIPS

El Paso Frontera Corporation CONOCOPHILLIPS

El Paso Gas Marketing Co. CONOCOPHILLIPS

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

28

El Paso Gas Transportation Company CONOCOPHILLIPS

El Paso Hydrocarbons Co. CONOCOPHILLIPS

El Paso Hydorcarbons Gas Processing Co. CONOCOPHILLIPS

El Paso Hydrocarbons Pipeline Co. CONOCOPHILLIPS

El Paso Hydrocarbons Service Co. CONOCOPHILLIPS

El Paso Hydrocarbons Transportation Co. CONOCOPHILLIPS

El Paso Natural Gas Clearinghouse Co. CONOCOPHILLIPS

El Paso Natural Gas Company CONOCOPHILLIPS

El Paso Production Company CONOCOPHILLIPS

El Paso Production Oil & Gas USA, LP EL PASO E&P COMPANY, LP

El Paso Products Company CONOCOPHILLIPS

El Paso Storage Company CONOCOPHILLIPS

El Rey Petroleum, Inc. JOHN P. MCHAUGHTON

El Toro Exploration ROLAND LIBERDA

Eland Energy, Inc. SUNDOWN ENERGY INC.

Eldorado Refining Company 1968 AMERICAN PETROFINA PIPELINE CO.

Elf Acquitaine Inc. TOTAL E&P USA INC

Elf Exploration, Inc. TOTAL E&P USA INC

Elk Basin Petroleum Co. 1928 CONOCOPHILLIPS

Elk River Resources SUNCO PARTNERS MKTG & TERMINALS

Elysium Energy, LLC NOBLE ENERGY, INC

EMCOR PETROLEUM CO.

Emejota Engineering Corporation TOTAL E&P USA INC

Empire Energy 1980 BP AMERICA

Empire Oil Company OCCIDENTAL OIL & GAS CORPORATION

Empire Southern Production Co. ANDREWS PRODUCTION CO.

ENCANA CORP.

ENCANA ENERGY HOLDINGS, INC.

ENCANA ENERGY RESOURCES, INC.

ENCANA ENERGY SERVICES

ENCANA GAS STORAGE INC.

ENCANA GATHERING SERVICES (USA)

ENCANA GULF OF MEXICO, INC

ENCANA HERITAGE LANDS

ENCANA INTERNATIONAL (USA), INC.

ENCANA MARKETING (USA), INC.

ENCANA MIDSTREAM, INC.

ENCANA MIDSTREAM, LTD.

ENCANA OIL & GAS (USA), INC.

ENCANA OIL & GAS CO., LTD

ENCANA OIL & GAS PARTNERSHIP

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

29

ENCANA PIPELINES (USA), INC

ENCANA PIPELINES, LTD

ENCANA RESOURCES

ENCANA WEST LTD.

ENCINO ENERGY & DEVELOPMENT CORP.

ENCORE OPERATING, LP

ENDEAVOR NATURAL GAS, LP

ENERGEN RESOURCES

Energen Resources MAQ, Inc. ENERGEN RESOURCES CORP.

Energy Corp. of America, Inc. EQUITABLE PETROLEUM CORP.

ENERGY DEVELOPMENT CORP.

ENERGY DEVELOPMENT PARTNERS LTD.

Energy Methods Corp. EMCOR PETROLEUM CO.

Energy Oil & Gas Corp. 1978 OIL CITY PETROLEUM, INC.

ENERGY OIL INC.

Energy Oil Inc. of Colorado SNYDER OIL PARTNERS

Energy Reserves Group Inc. 1985 BHP PETROLEUM (AMERICAS) INC.

Energy Resources Corp. 1984 * RIO PETROLEUM INC.

ENERGY SOURCES INC.

Enertec Corp. RIO PETROLEUM INC.

ENEX RESOURCES CORP.

Enfield Energy 81-A DOMINION EXPL & PROD INC.

Enfield Energy 84-A see Dominion Exploration & Production

ENGELKE

Enhanced Energy Resources ANADARKO E&P COMPANY, LP

Enopco, Inc. 1989 UMC PETROLEUM CORP.

Enpal, Inc. 1989 UMC PETROLEUM CORP.

EnRe, LP (Texas Properties) J-W OPERATING CO.

Enron Corp., E&P Division EOG RESOURCES, INC.

Enron Exploration Company EOG RESOURCES, INC.

Enron Oil & Gas Co. EOG RESOURCES, INC.

Enron Oil & Gas Marketing, Inc. EOG RESOURCES, INC.

Enron Producing Company EOG RESOURCES, INC.

Enserch Corporation NEWFIELD EXPLORATION GULF COAST

Enserch Energy, inc. NEWFIELD EXPLORATION GULF COAST

Enserch Exploration, inc. NEWFIELD EXPLORATION GULF COAST

Enserch Oil Company NEWFIELD EXPLORATION GULF COAST

Enserch Sacroc, Inc. NEWFIELD EXPLORATION GULF COAST

Ensign Oil Co. KERR-MCGEE CORP

Ensource, Inc 1989 UMC PETROLEUM CORP.

Enstar Petroleum Corp. 1985 UNIMAR CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

30

Entech Gas Ventures ENCANA ENERGY

Enterprises Energy Corp. 1986 BELDEN & BLAKE ENERGY CO.

Enterprise Gas Co. ENTERPRISE RESOURCES INC.

ENTERPRISE RESOURCES INC.

Entex Energy Operations Ltd. 1987 UMC PETROLEUM CORP.

Entex Petroleum Inc. 1987 UMC PETROLEUM CORP.

EOG RESOURCES, INC.

EOTT Company PLAINS ALL AMERICAN PIPELINE, LP

EP Operating Ltd. Partnership NEWFIELD EXPLORATION GULF COAST

EPCO, Inc. ENTERPRISE PRODUCTS COMPANY

EPX Co. CONOCOPHILLIPS

Equatorial Energy, Inc. RESOLUTE ENERGY, INC.

Equitable Gas Co. 1985 EQUITABLE RESOURCES INC.

EQUITABLE PETROLEUM CORP.

EQUITBLE RESOURCES INC.

EQUITY OIL CO.

Equiva Trading Co. SHELL TRADING (U.S.) CO,

ESKEY INC.

Espero Energy SOUTHWEST ROYALTIES INC.

Essex Exploration, Inc. 1983 see Dominion Exploration & Production

Ethyl Oil & Gas Corp. 1989 TREDEGAR OIL & GAS CORP.

Ethyl Petroleum Corp. 1989 TREDEGAR PETROLEUM CORP.

Ethyl Properties, Inc 1989 TREDEGAR PROPERTIES, INC.

EuroTex Resources, Inc. KERRCO INC.

EVERGREEN OPERATING CORP.

Evergreen Resources, Inc. PIONEER NATURAL RESOURCES USA,

Excalibur Ventures Inc. 1987 BALBOA EXPLORATION CO.

Exchange Oil & Gas Corp. 1985 TRANSCO EXPLORATION PARTNERS

Exchange Oil & Gas Corp. 1986 * TOTAL E&P USA INC

Exeter Exploration 1986 APACHE CORP.

Exeter Exploration Co. MCN EXPLORATION

Ex-Mission Ranches, Inc. CONOCOPHILLIPS

Exploration Co. of Louisiana Inc. 1987 * FINA OIL & CHEMICAL CO.

EXXON MOBIL CORP.

F.E. HARPER

F.K. Johnson ANADARKO PETROLEUM CORPORA-

F.P. Kendall Oil Co. 1958 CONOCOPHILLIPS

F.T. JOHNSON, JR.

F. W. Merrick, Inc. 1943 CONOCOPHILLIPS

Fabco Oil Co., Inc. (Merger) IMPERIAL OIL COMPANY

Fadsin Production, Inc. 1984 DEVON ENERGY

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

31

Fair Oil Company 1975* TOTAL E&P USA INC

Falcon Seaboard Inc. 1979 MAXUS ENERGY CORP.

Fargo Oils Ltd. CHEVRON CORP

FARMERS OIL COMPANY

Farmer's Union Central Exchng, Inc 12/93 CENEX, INC.

Farmland Industries, Inc. COFFEYVILLE RESOURCES, LLC

Faulkner Corporation CHESAPEAKE EXPLORATION LLC

FCD Oil Corp. 11/86 DOMINION EXPL & PROD INC.

FEC offshore Inventory Company EOG RESOURCES, INC.

Federated Energy 1985 FEDERATED NAT RESOURCES CORP.

FEDERATED NATURAL RESOURCES

FELL & WOLFE OIL CO.

Felmont Oil & Gas Co. 1990 TORCH OIL & GAS CO.

FGL, Inc. SUNDOWN ENERGY, INC.

FIDELITY OIL CO.

Fifteen Oil Co. 1960 see Tenneco Inc

Filon Exploration Co. 1979 see Dominion Exploration & Production

Fina Exploration, Inc. 1989 TOTAL E&P USA INC

Fina LaTerre, Inc. TOTAL E&P USA INC

Fina Oil & Chemical Co. TOTAL E&P USA INC

Fina Oil and Gas, Inc. 1988 TOTAL E&P USA INC

Fina Supply, Inc. 1985 TOTAL E&P USA INC

Fina, Inc. TOTAL E&P USA INC

Finadel Exploration, Inc. 1987 TOTAL E&P USA INC

Finadel Pipe Line Company 1984 TOTAL E&P USA INC

Finadel, Incorperated 1982 TOTAL E&P USA INC

Financial Technology Inc. 1975 TEXON ENERGY CORP.

FINATERRE, INC.

Fine Line Diversified Ventures, Inc. FINE LINE O&G TX (WY)(LA)(MULTI -

Fin-Oil, Inc. 1988 TOTAL E&P USA INC

FIN-TEX PIPELINE COMPANY

FIRST ENERGY CORP.

First Mississippi Corp. FIRST ENERGY CORP.

First Permian, LP ENERGEN RESOURCES CORP.

FIVE STAR ROYALTY PARTNERS, LTD. managed by AVIVA

Flag Oil Corp. 1970 KERR-MCGEE CORP

Flag-Redfern Oil Co. 1988 KERR-MCGEE CORP

Flagstone Petroleum Corp. MAP RESOURCES, INC.

Florida Exploration Co. 1984 EOG RESOURCES, INC.

Florida Gas Exploration Co. 1979 EOG RESOURCES, INC.

Floyd Karsten CHEVRON CORP

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

32

Fluor Oil & Gas Corp. PRIMARY FUELS, INC.

FMP Operating Co. A Ltd. Partnership 1990 FREEPORT-MCMORAN OIL & GAS

Focus Energy LLC CHESAPEAKE EXPLORATION LLC

Fohs Oil Co. 1946 BP AMERICA

FORCHALL OIL

Forest Oil Co., Inc. 1924 FOREST OIL CORP.

Forest Oil Corporation SABINE OIL & GAS CORPORATION

Forest Oil Corp. 1974 * SUNCO PARTNERS MKTG & TERMINALS

FOREST OIL PERMAIN CORP.

Fortuna Energy TALISMAN ENERGY USA INC

Fountain Oil & Gas Inc. WICHITA RIVER OIL CO.

Four Queens Petroleum Corp. FELL & WOLF OIL CO.

FP, Inc RANGE RESOURCES - APPALACHIA,

FPCO Oil & Gas Co. 1987 FREEPORT-MCMORAN OIL & GAS

Franco Petroleum Co. 1913 BP AMERICA

Franco Western CONOCOPHILLIPS

Franco Wyoming Oil CONOCOPHILLIPS

Frankel Oil Co. FRANKEL OIL & GAS CO.

Frankfort Oil Co. SUNCO PARTNERS MKTG & TERMINALS

Frantz Corp. 1928 CONOCOPHILLIPS

FRAZIER

Fred Olson Inc. VOLVO PETROLEUM, INC.

Freedom Energy, Inc. SEDNA ENERGY, INC.

Freeport Oil Co. FREEPORT-MCMORAN INC.

Freeport-McMoRan Energy Partners 1990 FREEPORT-MCMORAN OIL & GAS

FREEPORT-MCMORAN OIL & GAS

FREMONT ENERGY CORP.

French Petroleum Corporation RANGE RESOURCES - APPALACHIA,

Frio Drilling Co. 1982 FRIO EXPLORATION CO.

FRIO EXPLORATION CO.

Frontier Acquisition Corp. RATEX RESOURCES INC.

FRONTIER ENERGY CORP.

FRONTIER OIL CORPORATION

Fuhrman Petroleum Corp. CONOCOPHILLIPS

Fullerton Oil 1953 EXXON MOBIL CORP.

Funk Exploration 1985 ANADARKO E&P COMPANY, LP

Future Acquisition 1995, Ltd. PETROHAWK PROPERTIES, LP

Future Energy Corp. PETROHAWK PROPERTIES, LP

Future Petroleum Corp. PETROHAWK PROPERTIES, LP

Future Resources 1981 BOGART OIL CO./LOUIS DREYFUS GAS

G.O.C. Corp. 1984 DEVON ENERGY

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

33

G.P. Livemore, Inc. GREAT WESTERN OIL

G/O INTERNATIONAL, INC.

Galaxy Oil Co. 1987* GLOBAL NATURAL RESOURCES CORP.

Galena-Signal Oil Co. 1928 CHEVRON CORP

Gamble-Daniel Operating Co. PARTNERS OIL CO.

Garfield County Exploration CHEVRON CORP U.S.A. INC.

Gas Anadarko, Ltd Successors, The AVEN GAS & OIL, INC.

Gas Producing Enterprices, Inc. BORDER EXPLORATION CO.

GASOLINE PRODUCTION CORP.

GBK LLC Holdings GBK Investments, LLC

GCO Minerals Company CHEVRON CORP.

Gem Oil, Inc. see Dominion Exploration & Production

Gemini Corp. 1986 ANADARKO E&P COMPANY, LP

General American Oil Co. 1983 CONOCOPHILLIPS

General Atlantic Energy Corp. UMC PETROLEUM CORP.

General Atlantic Gulf Coast Inc. UMC PETROLEUM CORP.

General Atlantic Resources Inc. UMC PETROLEUM CORP.

General Crude Oil Co. 1979 EXXON MOBIL CORPORATION

GENERAL ENERGY OPERATIONS LTD.

GENERAL ENERGY RESOURCES & TECH-

General Hydrocarbons Inc. 1985 ENCANA ENERGY

General LP Acquisition Inc. 1989 UMC PETROLEUM CORP.

General Petroleum Corp. 1926 EXXON MOBIL CORP.

General Producing Co. 1988 UMC PETROLEUM CORP.

General Production Co., Inc. 1983 ZAPATA EXPLORATION CO.

Genesis Petroleum Corp. 1986 * DEVON SFS OPERATING, INC.

GeoDynamics Oil & Gas, Inc. 1984 DEVON ENERGY

Geodyne Resources 1993 SAMSON PROD SERVICES COMPANY

GeoResources Management Corp. 1984 DEVON ENERGY

George J. Greer Trustee 1957 see Dominion Exploration & Production

George M. Shanor 1969 F.T. JOHNSON, JR.

George Mitchell & Associates DEVON ENERGY

George R. Brown, Oil & Gas Div. HIGHLAND RESOURCES, INC.

George Rodman Inc. 1984 CHAPMAN ENERGY INC.

Gerber Energy International 1987 GOLD KING CONSOLIDATED, INC.

Getty Oil Co. 1984 CHEVRON CORP.

GHK CO.

GHR Energy Corp. 1986 TRANSAMERICAN NATURAL GAS CORP.

GIBRALTAR EXPLORATION LTD.

Gilcrease Oil Co. VENUS OIL CO.

Gilliland Producting & Refining 1936 CONOCOPHILLIPS

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

34

Gillring Oil Co. RANGE PROD. CO.

Gillring Prod. Co. RANGE PROD. CO.

GKM Inc. 1987 PETROMARK RESOURCES CO.

Glacier Arizona Company CONOCOPHILLIPS

Glacier Park Boulder Company CONOCOPHILLIPS

Glacier Park Company CONOCOPHILLIPS

Glacier Park Denver Company CONOCOPHILLIPS

Glacier Park Gateway Company CONOCOPHILLIPS

Glacier Park Kent Industrial Co.

Glacier Park King Street Co. CONOCOPHILLIPS

Glacier Park Liquidating Co. CONOCOPHILLIPS

Glacier Park Naperville Co. CONOCOPHILLIPS

Glacier Park Northwest CONOCOPHILLIPS

Glacier Park Orillia Company 1 CONOCOPHILLIPS

Glacier Park Riverpoint Company CONOCOPHILLIPS

Glacier Park South Lander Co. CONOCOPHILLIPS

Glacier Park Wayzata Co. CONOCOPHILLIPS

Glacier Production Co. 1944 CHEVRON CORP

Gladstone Royalties LLC LINN ENERGY HOLDINGS, LLC

Glen McCarthy 1957 * EOG RESOURCES, INC.

GLOBAL NATURAL RESOURCES CORP.

Global Natural Resources Corp. of Maryland GLOBAL NATURAL RESOURCES CORP.

Global Natural Resources Corp. of Texas GLOBAL NATURAL RESOURCES CORP.

Global Nevada-Galaxy I Ltd. GLOBAL NATURAL RESOURCES CORP.

Global Nevada-Galaxy, Inc. GLOBAL NATURAL RESOURCES CORP.

Globe Oil & Refining Co. LARIO OIL & GAS CO.

Glorieta Oil Co. KERR-MCGEE CORP

Glover Hefner Kennedy Oil Co. GHK CO.

GOLD KING CONSOLIDATED, INC.

Golden Exploration & Production Corp. LONGVIEW PRODUCTION COMPANY

GoldKing Production Co. 1985 DENOVO OIL & GAS CO.

GOLIAD OPERATING COMPANY

Goliad Partners, LP GOLIAD O&G TX (WY)(LA)(MULTI-

Good Hope Refineries Inc. TRANSAMERICAN NATURAL GAS CORP.

Gordon Exploration Co. GOLIAD OPERATING COMPANY

Gordon Street, Inc. 1969 NORTH AMERICAN ROYALTIES, INC.

Gothic Energy Corp. CHESAPEAKE

Grace Petroleum Corp. 1993 SAMSON PROD SERVICES COMPANY

GRAHAM EXPLORATION

GRAHAM RESOURCES INC.

Graham Royalty Ltd. 11/93 DOMININ OKLA TEXAS EXPL & PROD,

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

35

Graham-McCormick Oil/Gas Ptnrshp 1988 * SNYDER OIL PARTNERS LP

Grand Banks Corp. RANGE PROD. CO.

Grand Isle Oil & Gas XTO ENERGY

Granite Falls Rock, Inc. CONOCOPHILLIPS

Granite Operating Co. APACHE CORP.

Graridge Crop. 1966 * TOTAL E&P USA INC

Grayhawk Energy Inc CHESAPEAKE EXPLORATION LLC

Grayhill Exploration Co. 1986 U.S. MINERALS EXPLORATION CO.

GREAT AMERICAN RESOURCES, INC.

Great Basins Petroleum Co. HESS CORPORATION

Great Expectations Oil Co. 1984 BP AMERICA

Great Lakes Energy Development, Inc. HIGHMOUNT EXPLORATION & PRODUC-

Great Lakes Energy Partners LLC RANGE RESOURCES - APPALACHIA,

Great Plains Development CONOCOPHILLIPS

GREAT RIVER OIL & GAS CORP.

Great Western Exploration GREAT WESTERN ONSHORE INC.

GREAT WESTERN OFFSHORE INC.

Great Western Oil & Gas Inc. 1989 GREAT WESTERN OFFSHORE INC.

Great Western Oil & Gas Inc. 1989 GREAT WESTERN ONSHORE INC.

Greenwood Holdings Inc. 10/93 HEADINGTON INVESTMENTS, INC.

Greystone Sligo Holsings Inc CHESAPEAKE EXPLORATION LLC

Greystone Petroleum LLC CHESAPEAKE EXPLORATION LLC

Griffin Petroleum Corp. 1982 KAISER-FRANCIS OIL CO.

GROVE OIL & GAS

GS Oil & Gas Co. 1985 see Dominion Exploration & Production

Guardian Oil Co. 1916 Shell Oil Co.

Guardian Oil Co. 1983 * PATRICK PETROLEUM CO,

GULF CANADA RESOURCES LTD.

Gulf Coast Acquisition Properties SUNDOWN ENERGY INC.

Gulf Energy & Minerals Co. CHEVRON CORP

Gulf Energy Development Corp. 1988 TEJAS GAS CORP.

GULF EXPLORATION CONSULTING, INC.

Gulf Oil Co. 1984 CHEVRON CORP.

Gulf Oil Exploration & Production Co. CHEVRON CORP.

Gulf States WESTERN

Gulf States Production Company YUMA EXPL AND PROD CO., INC.

Gulfstar Energy Inc. RANGE ENERGY CORP.

Gulftex Oil Company (Merger) IMPERIAL OIL COMPANY

Gunsmoke Enegy DIAMOND S ENERGY COMPANY

GW Petroleum Inc. 1989 GREAT WESTERN ONSHORE INC.

GWP Inc. 1989 GREAT WESTERN ONSHORE INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

36

GWR Operating Co. 1989 GREAT WESTERN ONSHORE INC.

Gypsy Oil Co. CHEVRON CORP

H.B. Zachry GASOLINE PRODUCTION CORP.

H. Conquat LONGHORN OIL & GAS CO.

H.R. Smith WESTERN

H.W. Bass & Sons, Inc. GOLIAD OIL & GAS CO.

HADSON CORPORATION

Hadson Gas Co. APACHE CORP.

Hallwood Energy Co. CHEVRON CORP.

Hallwood Operating Co. CHEVRON CORP.

Hallwood Petroleum Inc. CHEVRON CORP.

Hamilton Bros. Oil Co. BHP PETROLEUM (AMERICAS) INC.

Hamilton Oil 1928 CONOCOPHILLIPS

Hampton Operating Company HAMPTON RESOURCES CORP.

Hampton Resources Corporation HAMPTON RESOURCES CORP.

Hancock il & Gas 1958 CONOCOPHILLIPS

Hanlon-Boyle Inc. 1962 see Dominion Exploration & Production

HANNA PETROLEUM CO.

Hanover Management Co. HESS CORPORATION

Hanover Pet Inc. 1987 Rocky Mtn Prop Only ENERGEN RESOURCES CORP.

Harbour Gas & Oil Inc. 1988 PETROHAWK PROPERTIES, LP

HarCor Exporation, Inc. (HCX) 1989 HARCOR ENERGY, INC.

HARDY OIL & GAS USA, INC.

HARKEN ENERGY CORP.

Harken Oil & Gas Inc. CABOT OIL & GAS CORP.

Harkins & Company (Acq.) ANADARKO E&P COMPANY, LP

Harp Ltd. 1986 TRITON MINERALS & ROYALTY, INC.

Harper Oil Co. MCN EXPLORATION

Harper Oil Co. 1986 APACHE CORP.

Harris-Bianchi-Hewitt H-B-H EXPLORATION CO.

Harrison J.S. ABERCROMBIE MINERAL CO.

Hartex-Anadarko Permian Basin Partnership EOG RESOURCES, INC.

HASSIE HUNT EXPLORATION COMPANY

Hastings Resources 1987 PETROHAWK PROPERTIES, LP

Hathaway Co. PYRAMID OIL CO.

Hawkins & Co. ANADARKO E&P COMPANY, LP

Hawthorne Oil & Gas Corp. 1988 AMERICAN NATIONAL PETROLEUM CO.

H-B-H EXPLORATION CO.

HCG ENERGY CORP.

HCW Inc. 1985 NRM ENERGY LIMITED PARTNERSHIP

HCW Oil & Gas Co. NRM ENERGY LIMITED PARTNERSHIP

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

37

HEADINGTON INVESTMENTS, INC.

Healdton Oil & Gas Co. 1929 EL PASO E&P COMPANY, LP

HEC La Plata, LLC CHEVRON CORP

HEC Peru, LLC CHEVRON CORP

HEC Petroleum, Inc. CHEVRON CORP

Hef-Lin Energy L L & B COMPANIES

HelmericH & Payne, Inc. CIMAREX ENERGY CO.

Helmick Oil Co. 1912 Shell Oil Co.

Hemingway, Bartell & Associates BARTELL EXPLORATION

Henderson Petroleum Corp. 1986 ZG ENERGY CORP.

Henry Energy Corp. 1987 KIMCO ENERGY CORP.

Henry Equity LLC LINN ENERGY HOLDINGS, LLC

Henry Savings LP LINN ENERGY HOLDINGS, LLC

Henry Savings Management LLC LINN ENERGY HOLDINGS, LLC

HEP OIL CO LTD SILVER CREEK RESOURCES, LLC

HEP OPERATING PARTNERS, L.P.

HEP Partners, LP CHEVRON CORP

HEP Pure Acquisitions, LLC CHEVRON CORP

HEP San Juan, LLC CHEVRON CORP

Heritage Glacier Park Company CONOCOPHILLIPS

Heritage Resources CO, LLC HIGHMOUNT EXPLORATION & PRODUC-

Herman G. Kaiser KAISER-FRANCIS OIL CO.

Hershy Oil Corp. (US Properties) see Dominion Exploration & Production

HESS CORPORATION

Hess Oil & Chemical 1969 HESS CORPORATION

Hexagon Oil & Gas, Inc. DABB ENERGY CO.

Heyser & Heard EXXON MOBIL CORP. L.P.

Hiawatha Oil & Gas Corp. 1987 * CASTLE ENERGY CORP.

Hiawatha Oil Co., Inc. 1983 PLAINS RESOURCES, INC.

Hickory Creek Oil Co. 1984 HANNA PETROLEUM CO.

Hickory Timbers Oil LP XTO ENERGY INC.

Hiland Energy Partners, LLC HILAND PARTNERS HOLDINGS LLC

Hiland Operating, LLC HILAND PARTNERS HOLDINGS LLC

Hiland Partners, LLC HILAND PARTNERS HOLDINGS LLC

High Crest Oils, Inc. BP AMERICA

High Plains Oil Corp. 1985 DEVON ENERGY

Highland Energy Co. CALPINE PRODUCER SER., LP

HIGHLAND RESOURCES, INC.

Highmount Black Warrior Basin LLC WALTER BLACK WARRIOR BASIN LLC

HighMount Midwest Energy LLC LINN OPERATING, INC.

HighMount Exploration and Production Michi- ENERVEST LTD

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

38

Hightower Oil & Gas OLIX ENERGY

Hilliard Oil & Gas Inc. 1985 GRAHAM RESOURCES INC.

Hingeline-A1162Overthrust Oil/Gas, Inc. WHITING PETROLEUM CORP.

HiPoint Petroleum Corp. 1981 GIBRALTAR EXPLORATION LTD.

HLP Operating Co. 1986 HPC OPERATING CO.

HMG Associates NATURAL RESOURCE MGMT CORP.

HNG Fossil Fuels Co. 1983 EOG RESOURCES, INC.

HNG Offshore Properties, Inc. EOG RESOURCES, INC.

HNG Oil Co. 1985 EOG RESOURCES, INC.

HNG/InterNorth Exploration Co. 1986 EOG RESOURCES, INC.

HOC 1982 Rockies Oil Program see Dominion Exploration & Production

Hold Oil Corp. 1989 HCG ENERGY CORP.

Holding Company, Ltd. GLOBAL NATURAL RESOURCES CORP.

Holly Energy, Inc. 1984 EOG RESOURCES, INC.

Homa Oil and Gas Company Inc. FOREST OIL PERMIAN CORP.

Home Petroleum Corp. 1989 PRESIDIO OIL CO.

Home-Stake O&G Co. ENCORE OPERATING, LP

Home-Stake Royalty Corp. ENCORE OPERATING, LP

Hondo Oil & Gas Co. 1963 BP AMERICA

Hondo Oil & Gas Co. 1992 DEVON ENERGY

Honolulu Oil Corp. 1961 * BP AMERICA

Hoover & Bracken Energies, Inc. DIVERSIFIED ENERGIES INC.

Houston Drilling & Energy Corp. 1977 HOUSTON OIL & ENERGIES INC.

Houston Natural Gas Production Co. 1972 EOG RESOURCES, INC.

HOUSTON OIL & ENERGY, INC.

Houston Oil & Minerals 1981 DEVON ENERGY

Houston Oil Co. 1956 BP AMERICA

Houston Oil Fields Co. 1987 * PLAINS RESOURCES, INC.

Houston Oil Royalty Trust DEVON ENERGY

Houston Oil Trust DEVON ENERGY

Howell Petroleum Co. ANADARKO E&P ONSHORE LLC

HPC OPERATING CO.

HPC, INC. See PRESDIO OIL CO.

HS Resources Inc. - 2001 KERR-MCGEE ROCKY MOUNTAIN

HS Royalty Ltd ENCORE OPERATING, LP

Hudson Gas & Oil EXXON MOBIL CORP. LP

Hudson Oil Co. BP AMERICA

Hudson's Bay Oil & Gas Co. DOME PETROLEUM

Huffco Gas & Oil Inc. 1988 TOTAL E&P USA INC

Huffco Oil Programs Inc. 1988 TOTAL E&P USA INC

Huffco Petroleum Corp. 1988 TOTAL E&P USA INC

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

39

Huffington Exploration Corp. 1988 TOTAL E&P USA INC

Hughes Eastern Producing, Inc. UNION OIL CO. OF CALIFORNIA

Hughes Oil & Gas Inc. 1989 TEXAS MERIDIAN RESOURCES LTD

Hugoton Capitol Limited Partnership PIONEER NATURAL RESOURCES USA,

HUGOTON ENERGY CORPORATION

Hugoton Exploration Corporation CHESAPEAKE EXPLORATION LLC

Hugoton Production Co. 1969 PIONEER NATURAL RESOURCES USA,

Huisache Operating Co. 1977 PENINSULA RESOURCES CORP.

Humble Oil & Refining Co. 1972 EXXON MOBIL CORP L.P.

Humble Oil Co. 1917 EXXON MOBIL CORP L.P.

Humphreys Corp. 1931 BP AMERICA

Hunnicutt & Camp Co. 1981 see Tenneco Inc

HUNT OIL COMPANY

Hunt Petroleum (AEC) Inc XTO ENERGY INC.

Hunt Petroleum Corporation XTO ENERGY INC.

HUNTER RESOURCES, INC.

Huntington Beach Company CHEVRON U.S.A. INC.

Husky Oil Co. 1984 MARATHON OIL COMPANY

HUSKY OIL LTD

HYDRO GULF OF MEXICO, LLC

Hytech Energy Corp. 1979 ANADARKO E&P COMPANY, LP

I.W. Lovelady 1978 * DEVON ENERGY

Ibex Inc. BRECKENRIDGE OPERATING CO.

IEC Oil & Gas Corp. 1987 HEADINGTON INVESTMENTS, INC.

Ike Lovelady, Inc. 1986 PETROHAWK RESOURCES CO.

ILEX OIL CORP.

Illinois Industries Inc. 1985 TRANS ATLANTIC RESOURCES CORP.

Imperial American Energy 1977 * FREEPORT-MCMORAN ENERGY PTNRS

Imperial Oil Company of California IMPERIAL OIL COMPANY

Imperial Petroleum MOSS PETROLEUM

Incomare Resources, Inc. KERRCO INC.

Independent Exploartion Co. 1952 TESORO PETROLEUM CORP.

Independent Oil & Gas Co. 1927 CONOCOPHILLIPS

Independent Resources, Inc. ACCESS ENERGY CORP

Indian Oil Company CANAAN ENERGY CORPORATION

Indian Territory Illuminating Oil Co. OCCIDENTAL OIL & GAS CORPORATION

Indian Valley Oil Co. (Merger) IMPERIAL OIL COMPANY

Indian Wells Oil Co. 1979 * ANADARKO E&P COMPANY, LP OIL &

Indian Wells Oil Co. 1987 PARKER & PARSLEY PETROLEUM CO.

Industrial Gas Supply Corp. ENTERPRISE RESOURCES INC.

Inexco Oil Company CONOCOPHILLIPS

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

40

Ingram Oil & Refining Co. 1961 MURPHY OIL CORP.

Integral Petroleum Corp. 1976 BUTTES OIL & GAS CO.

Integrated Energy, Inc. MCO RESOURCES CORP.

Inter-American Petroleum Corp. 1978 GRAHAM RESOURCES INC.

InterCoast Oil & Gas Co. KCS RESOURCES, INC.

Intercoastal Operating Co. IOC EXPLORATION, INC.

International Min. & Chemical Corp. 1986 BASF CORP/WINTERSHALL CORP.

International Nuclear Corp. INEXCO OIL CO.

International Paper Co. CHEVRON MIDCONTINENT, LP

International Paper Gas Pipeline Co. CHEVRON MIDCONTINENT, LP

International Petr. Resources Corp. 1972 PACIFIC ENERPRISES OIL CO. (USA)

InterNorth Inc., E&P Division EOG RESOURCES, INC.

Intex Oil Co. 1968 TESORO PETROLEUM CORP.

Intratex Gas Co. EOG RESOURCES, INC.

Inveco Holding, Inc. KERRCO INC.

Investors Royalty Co., Inc. 1973 PACIFIC ENERPRISES OIL CO. (USA)

IOC EXPLORATION, INC.

Iowa/Illinois Gas & Electric Co. MID-AMERICA ENERGY CO.

IP Petroleum Co., Inc. CHEVRON MIDCONTINENT, LP

IRION MOUNTAIN OIL CO.

Iron Sights Operating Inc CHESAPEAKE EXPLORATION LLC

Island Oil & Exploration Co., Inc. PENROSE PRODUCTION

ITR Petroleum, Inc. 1987 GENERAL ATLANTIC ENERGY CORP.

IWG Co 5 KCS RESOURCES, INC.

J M HUBER CORP.

J. C. Trahan Drilling Co. TEXAS INTERNATIONAL PETROLEUM

J. D. WRATHER, JR.

J.E. Crosbie, Inc. 1951 KERR-MCGEE CORP

J.M. Guffey Petroleum Co. 1907 CHEVRON

J.P. Owen 1963 CONOCOPHILLIPS

J.R. Parten Estate FARMERS OIL COMPANY

J.S. ABERCROMBIE MINERAL CO.

J & D Petro, Inc. WILHELM RESOURCES, INC.

Jade Resources, Inc. 1991 CONSOLIDATED OIL & GAS, INC.

Jaeger Energy Corp. 1984 U.S. RESOURCES INC.

Jay Oil Company FOREST OIL PERMIAN CORP.

Jay Petroleum Inc CHESAPEAKE EXPLORATION LLC

Jefferson Lake Sulphur Co. OCCIDENTAL OIL & GAS CORPORATION

JEM Petroleum Corp. 1985 PATRICK PETROLEUM CO,

Jeremiah Corp. OCTOBER OIL CO.

Jergins Oil Co. EXXON MOBIL CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

41

Jerry Chambers Exploration Co. KERR-MCGEE CORP

Jerry Chambers Exploration Co. AXEM RESOURCES, INC.

Jet Oil Co. SOUTHWEST ROYALTIES INC. US OIL

JMG Oil & Gas CHAPARRAL ENERGY INC.

J-O'B OPERATING CO.

Jocelyn-Varn Oil Co. VARN OIL CO.

John A. Bell, Jr. 1917 BP AMERICA

John A. Taylor Co. 1983 PLAINS RESOURCES, INC.

John G. Hammons Inc. JGM COMPANY

JOHN P. MCNAUGHTON

Johnson Oil & Refining Co. 1956 CONOCOPHILLIPS

Johnson Oil & Gas Co. CHEVRON CORP.

Johnston Ranch Royalty Co. HESS CORPORATION

Jonell Gas MCO RESOURCES, INC.

Jones & Pellow Oil Co. 1987 * BOGERT OIL CO./LOUIS DREYFUS GAS

Jones-O'Brian J-O'B OPERATING CO.

JOSEPH B. SINGER OIL COMPANY managed by AVIVA

Journey Oil and Gas JETTA APPLACHIAN COMPANY

JR Operating Inc. GREAT LAKES ENERGY PARTNERS LLC

Julian Potter Estate 1969 ILEX OIL CORP.

Juniper Oil & Gas 1967 DAMSON OIL CORP.

JUPITER CORP.

J-W OPERATING CO.

K. Jain & Associates VENEX CORP.

K.R.M. Exploration, Inc. 1973 K.R.M. PETROLEUM CORP.

K.R.M. PETROLEUM CORP.

K. Stewart Petroleum CHESAPEAKE EXPLORATION LLC

Kaiser Energy Inc. 1987 PRESIDIO OIL CO.

Kaiser Oil (U.S.) Lrd. 1984 PLAINS PETROLEUM CO.

Kaiser-Francis Anadarko Limited Partnership GBK INVESTMENTS, LLC

Kaiser-Francis Anadarko, LLC GBK INVESTMENTS, LLC

Kaiser-Francis Gulf Coast, Ltd GBK INVESTMENTS, LLC

Kaiser-Francis Gulf Coast, LLC GBK INVESTMENTS, LLC

Kaiser-Francis Mid-Continent, LLC GBK INVESTMENTS, LLC

Kaiser-Francis Mid-Continent Limited Part- GBK INVESTMENTS, LLC

Kalispell Glacier Park Company CONOCOPHILLIPS

KANATA EXPLORATION OF WESTERN

Kaneb Oil & Gas Co. ANADARKO E&P COMPANY, LP

Keneb Operating Co., Ltd. 1988 * ANADARKO E&P COMPANY, LP

Kanex, Ltd. KERRCO INC.

Kansas-Nebraska Natural Gas 1983 PLAINS PETROLEUM CO.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

42

Kathol Petroleum, Inc. ANADARKO E&P COMPANY, LP

Katz Oil DALEN RESOURCES OIL & GAS CO.

Kaycee Exploration Ltd. 1974 PACIFIC ENERPRICES OIL CO. (USA)

KCS Medallion Resources, Inc. KCS RESOURCES, INC.

KCS Michigan Resources, Inc. KCS RESOURCES, INC.

KCS Mountain Resources, Inc. KCS RESOURCES, INC.

KCS RESOURCES, INC.

Keaton Oil & Gas Co. 1929 ASHLAND OIL CO.

Keba Oil & Gas Co. 1983 WHITING PETROLEUM CORP.

KEC Acquisition Corp. see Dominion Exploration & Production

Kee Exploration Inc. 1986 WICHITA RIVER OIL CO.

Keith Collins Petroleum Corp. 1985 GOLD KING CONSOLIDATED, INC.

Keith Oil Co. c1920 BP AMERICA

Kelley Oil Corp SAMSON

Kellogg Oil Co. 1915 BP AMERICA

Kelso Fund 81 Trust GLOBAL NATURAL RESOURCES CORP.

Kelso Funs 83-A Trust GLOBAL NATURAL RESOURCES CORP.

Kelso-Lambert Royalty Co., Inc. GLOBAL NATURAL RESOURCES CORP.

Kelso-Lambert Royalty Fund 1981 GLOBAL NATURAL RESOURCES CORP.

Kelso-Lambert Royalty Pool 1983-A GLOBAL NATURAL RESOURCES CORP.

Kenai Oil & Gas Inc. 1984 GRAHAM RESOURCES INC.

Kennedy Mitchel, Inc. 1986 HARKEN OIL & GAS INC.

Keoghan-Hurst Drilling Co. 1928 CONOCOPHILLIPS

Kerlyn Oil Co. 1946 KERR-MCGEE CORP.

Kern County Land Co. 1967 see Tenneco Inc

Kerr, Jain & Associates VENEX CORP.

KERRCO INC.

Kerrco, Ltd. KERRCO INC.

KERR-MCGEE CORP. ANADARKO PETROLEUM CORPORA-

Kerr-McGee North Am. Onshore Corp.-1996 DEVON ENERGY CORP.

KERR-MCGEE OIL & GAS ONSHORE, LP

Kerr-McGee Oil Industries 1965 KERR-MCGEE CORP.

Kerr-McGee Refining Corporation CALUMET LUBRICANTS

Kerr-McGee Refining Coporation (Oklahoma NATURAL GAS CLEARINGSHOUSE

KERR-MCGEE ROCKY MOUNTAIN CORP. ANADARKO PETROLEUM CORPORA-

Kewanee Industries 1977 CHEVRON

Key Oil Company 1976 TOTAL E&P USA INC

KEY PRODUCTION COMPANY

Keystone, Inc. KEYSTONE O&G TX (WY)(LA)(MULTI-

KFOC, INC.

KIMCO ENERGY CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

43

Kimmerer Oil CHEVRON

King Ranch Oil & Gas, Inc. 1988 * PRESIDIO OIL CO.

King Ranch, Inc. ST. MARY LAND & EXPLORATION, INC.

King Resources Co. 1978 TEXAS INTERNATIONAL PETROLEUM

Kingbell Oil Co. 1912 Shell Oil Co.

King-Stevenson Gas & Oil Co. 1965 TEXAS INTERNATIONAL PETROLEUM

Kingwood Oil Co. 1971 ANADARKO E&P COMPANY, LP

Kirby Exploration Company of Texas see Dominion Exploration & Production

Kirby Fletcher Stamford see Dominion Exploration & Production

Kirby Oil & Gas Co. 1957 see Dominion Exploration & Production

Kirby Petroleum Co. 1943 * CONOCOPHILLIPS

Kirby Petroleum Co. 1988 * see Dominion Exploration & Production

KISKA OIL CO.

KLS Holdings KERRCO INC.

KN Energy Inc. 1985 PLAINS PETROLEUM CO.

Koch Hydrocarbons ONEOK

Koch Oil Co. (50%) FLINT HILLS REOURCES LP

Koch Oil Co. (50%) KOCH INDUSTRIES INC.

Koch, Fred C. KOCH EXPLORATION COMPANY, LLC

Koch, Mary R. KOCH EXPLORATION COMPANY, LLC

Koch Development Corporation KOCH EXPLORATION COMPANY, LLC

Kodiak Oil & Gas (USA) Inc WHITING OIL AND GAS CORPORATION

KP Exploration Inc. 1993 UMC PETROLEUM CORP.

KSA Industries 1974 ADAMS RESOURCES & ENERGY, INC.

K-T Oil Corporation 1982 TOTAL E&P USA INC

L & G Oil & Royalty Co. HESS CORPORATION

L L & B COMPANIES

L L & B Resources L L & B COMPANIES

L. G. Williams Oil Co. 1984 MATRIX ENERGY INC.

L. Noble NOBLE ENERGY, INC. OIL CORP.

LaClare Petroleum Inc. 1985 THE MERIDIAN RESOURCES CORPORA-

Ladd Petroleum Corp. (Merger) ANADARKO E&P COMPANY, LP

LAE Energy, Inc. PETROHAWK RESOURCES CO.

LaGloria Oil & Gas 1957 NOBLE ENERGY, INC.

Lagorce Oil Co. 1969 APACHE CORP.

Laguna Petroleum OXY USA WTP

Laird Oil & Gas, Inc. 1972 WAINOCO OIL CORP.

Lambert Exploration, Inc. GLOBAL NATURAL RESOURCES CORP.

Lamson & Bennett LAMSON/ONSHORE PETROLEUM CORP.

LAMSON/ONSHORE PETROLEUM CORP.

Landa Oil Co. HESS CORPORATION

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

44

LANTERN PETROLEUM CORPORATION

LaPlata Associates, LLC CHEVRON MIDCONTINENT, LP

Larcon Oil Co. HESS CORPORATION

Largo Drilling & Exploration Corp. 1972 TRANSCONTINENTAL OIL CO.

Lariat Petroleum NEWFIELD EXPL MID-CONTINENT INC.

LARIO OIL & GAS CO.

Laser Oil Co. KERR-MCGEE CORP

LASMO ENERGY CORP.

LATERRE DEVELOPMENT CORP.

Latigo Petroleum., Inc. (wholly owned subsid- PLAINS EXPLORATION & PRODUCTION

Laurel Royalty Co. 1972 PACIFIC ENERPRISES OIL CO. (USA)

LAVINO OIL & GAS CO.

Lawton Oil EL PASO E&P CO., LP

Le Norman Loco, Inc NOBLE ENERGY, INC

Le Norman Partners, LLC NOBLE ENERGY, INC

Leader Development Corp. 1987 CLINTON GAS SYSTEMS, INC.

Lear Petroleum Corp. 1988 DALEN RESOURCES OIL & GAS CO.

Lear Petroleum Prtnrs Operating Co. 1986 ENERGEN RESOURCES CORP.

Leben Oil Corp. KAISER-FRANCIS OIL CO.

LeCuno Oil Corp. HESS CORPORATION

Lee M. Bass, Inc. LMBI O&G TX (WY)(LA)(MULTI-STATE)

Leede Exploration Co. 1978 CONOCOPHILLIPS

Leidy Prospecting Co. 1953 CHEVRON

LENORMAN ENERGY CORP.

Leonard Oil see Tenneco Inc

Lewcinda Oil & Gas Co. 1917 CONOCOPHILLIPS

Lewis Production CHEVRON

Liberty North America, Inc. 1988 PRESIDIO OIL CO.

Liberty Oil & Gas Corp. 1988 * PRESIDIO OIL CO.

Limark Corporation NORTHSTAR OPERATING CO.

Limited Oil Co. 1936 EXXON MOBIL CORP.

Limpia Royalty 1962 CHEVRON

Lindenmuth and Associates L L & B COMPANIES

Lind Oil & Gas Company COMANCHE RESOURCES COMPANY

Lindy Petroleum Co. 1982 PATHFINDER PETROLEUM CORP.

LINGEN OIL & GAS INC.

Link Energy, LLC PLAINS ALL AMERICAN PIPELINE, LP

Linn Energy Holdings, LLC RIVIERA UPSTREAM, LLC

Linn Operating, LLC RIVIERA OPERATING, LLC

Lion Oil Co. 1955 LION OIL TRADING & TRANSPORTA-

Lion Oil Company LION OIL TRADING & TRANSPORTA-

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

45

Lion Oil Refining Company 1945 LION OIL TRADING & TRANSPORTA-

LION OIL TRADING & TRANSPORTATION,

Lipan Oil Co. ENCANA ENERGY

Logan & Barton CHARLIE BARTON

Lomak Energy Co. RANGE ENERGY I, INC.

Lomak Energy Services Co. RANGE ENERGY SERVICES CO

Lomak Gas Co. RANGE GAS CO

Lomak Gathering & Pros. Co. RANGE GATHERING & PROS. CO

Lomak Offshore LP RANGE OFFSHORE LP

Lomak Operating Co. GREAT LAKES ENERGY PARTNERS LLC

Lomak Petro. (Ohio) Inc. GREAT LAKES ENERGY PARTNERS LLC

Lomak Petroleum Inc. RANGE RESOURCES CORP.

Lomak Pipeline Systems LP RANGE PIPELINE SYSTEMS LP

Lomak Production Co. RANGE PRODUCTION CO.

Lomak Production I LP RANGE PRODUCTION I LP

Lomak Resources Co. GREAT LAKES ENERGY PARTNERS LLC

Lomak Resources LLC RANGE RESOURCES LLC

Lomita Gasoline Company CHEVRON U.S.A. INC.

Lone Star Production Co. NEWFIELD EXPLORATION GULF

Long-Bell Petroleum Company, Inc. CHEVRON MIDCONTINENT, LP

Longhorn Oil & Gas WAGNER & BROWN, LTD.

Longview Energy General Partners Inc. LONGVIEW ENERGY COMPANY

Longview Gas Company LONGVIEW ENERGY COMPANY

Longview Production Company LONGVIEW ENERGY COMPANY

Lorena Oil Co. CHEVRON

Los Angeles Oil & Refining Co. 1915 BP AMERICA

Los Nietos Co. 1959 CHEVRON CORP.

Lou-Can Oil & Gas, Inc. FRONTIER ENERGY CORP.

Louis Dreyfus Natural Gas Corp. DOMINION EXPLOR. & PROD., INC.

Louisiana Land & Exploration Co CONOCOPHILLIPS

Louisiana Minerals, Ltd. PETER PAUL PETROLEUM CO., GEN.

Louisiana-Hunt Petroleum HUNT PETROLEUM CORPORATION

Love Petroleum Co. SOUTHWEST ROYALTIES, INC.

LPI Acquisition Inc. RANGE ACQUISITION INC.

LPI Operating Co RRC OPERATING CO

LRF Corp RANGE RESOURCES - APPALACHIA,

LUCK PETROLEUM CORP.

LVO Corp. 1974 ANADARKO E&P COMPANY, LP

Lyco Energy Corporation ENERPLUS RESOURCES (USA) CORP.

M & M Production see Tenneco Inc

M.R. YOUNG

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

46

MacDonald Oil Corp. 1975 DEVON ENERGY

Madison Pipe Line Company FARMERS OIL COMPANY

Madiion Resources 1985 DEVON ENERGY

MAGIC CIRCLE ENERGY CORP.

Magic Circle Oil Co. 1980 MAGIC CIRCLE ENERGY CORP.

Magna Oil Corp. HESS CORPORATION

Magness Petroleum Co. SAMSON PROD SERVICES COMPANY

Magnolia Petroleum Co. 1959 EXXON MOBIL CORP.

Magnum-Hunter Production, Inc. CIMAREX ENERGY CO

Maguire Energy Company MAGUIRE OIL COMPANY

MAGUIRE OIL COMPANY

Mainland Oil & Minerals, Inc. MAINLAND RESOURCES, INC.

MAINLAND RESOURCES, INC.

Majestic Resources, Inc. 1981 ALTA ENERGY CORP.

Malco Refining BP AMERICA

Malka Production Co. 1978 CONOCOPHILLIPS

Mallon Oil Co. BLACK HILLS GAS RESOURCES, INC.

MAPCO, Inc. 1985 see Dominion Exploration & Production

Maplewood Glacier Park Company CONOCOPHILLIPS

MAPP Exploration Inc. 1983 BELCOR, INC.

Marathon Oil Co. 1982 MARATHON OIL COMPANY

MARATHON OIL COMPANY

Marathon Petroleum Co. MARATHON OIL COMPANY

MARINE PROPERTIES, INC.

MARINER ENERGY, INC APACHE CORP.

Marion Corp. 1987 * DEVON SFS OPERATING, INC.

Mark Resources Corp. RANGE RESOURCES CORP.

Marland Oil Co. 1929 CONOCOPHILLIPS

Marline Petroleum Corp. 1985 DEVON ENERGY

Marrs McLean 1931 * BP AMERICA

MARTIN EXPLORATION CORP.

Maryland Oil Corp. see Tenneco Inc

Masai Minerals, Ltd. HESS CORPORATION

Masters Energy Corp. 1986 HARKEN OIL & GAS INC.

Matador Petroleum Co. 1922 Shell Oil Co.

Matador Petroleum Corp. ENCANA OIL & GAS USA, INC.

MATADOR RESOURCES CO.

Matagorda Bay Pipeline, Inc. see Dominion Exploration & Production

Matagorda Drilling & Expl. Co. 1982 CONVEST ENERGY CORP.

Matagorda Island Development Corp. 1992 ANADARKO PETROLEUM CORPORA-

Matagorda Island Exploration Corp. 1992 ANADARKO PETROLEUM CORPORA-

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

47

Matagorda Pipeline Partnership see Dominion Exploration & Production

MATRIX ENERGY INC.

Maverick Consulting Co. KFOC, INC.

Maxus Energy Company MIDGARD ENERGY COMPANY

Maxus Exploration Company MIDGARD ENERGY COMPANY

May Energy Partners 1987 QUINOCO CO.

May Petroleum Inc. 1987 * ENERGY DEVELOPMENT PARTNERS

Mayfair Minerals, Inc. see Tenneco Inc

Maynard Oil Co. FOREST OIL CORP.

Maynard Oil Co. - Southern Oklahoma Prop- LAMAMCO DRILLING CO.

Mayo FRAZIER

Maze Energy Corporation see Dominion Exploration & Production

Maze Exploration, Inc. see Dominion Exploration & Production

Maze-A 1983 Limited see Dominion Exploration & Production

MB Operating Co Inc. GREAT LAKES ENERGY PARTNERS LLC

McAlester Fuel Co. 1983 UNIMAR CORP.

McClure Oil 1960 MARATHON OIL COMPANY

McColl-Frontenac Oil Co., Ltd. 1948 CHEVRON

McCollum Exploration Co. WESTERN GEOPHYSICAL

MCCRARY, AN OKLAHOMA LP mangaged by AVIVA

McCulloch Energy, Inc. HARKEN ENERGY COMPANY

McCulloch Oil & Gas Corp. UMC PETROLEUM CORP.

McCulloch Oil Corp. of Texas UMC PETROLEUM CORP.

MCFARLAND ENERGY INC.

McFarlane Oil Co., Inc. GLOBAL NATURAL RESOURCES CORP.

McGowen Exploration Co. 1984 PLAINS PETROLEUM CO.

McGrath & Smith See Smith & McGrath

McKee Petroleum Corp. 1976 EXXON MOBIL CORP.

McMan Oil & Gas Co. 1931 BP AMERICA

McMoRan Oil & Gas Co. 1981 FREEPORT-MCMORAN INC.

MCN Energy Enterprises SUNDOWN ENERGY INC.

MCN EXPLORATION

MCN Investment Corp SUNDOWN ENERGY INC.

MCN Oil & Gas Co. SUNDOWN ENERGY INC.

MCNIC Enhanced Prod SUNDOWN ENERGY INC.

MCNIC Midcontinent Properties SUNDOWN ENERGY INC.

MCNIC Oil & Gas Midcontinent, Inc. SUNDOWN ENERGY INC.

MCNIC Oil & Gas Properties SUNDOWN ENERGY INC.

MCNIC Oil and Gas Company SUNDOWN ENERGY INC.

MCO Resources, Inc. UMC PETROLEUM CORP.

MCOR Oil & Gas Corp. 1980 UMC PETROLEUM CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

48

MC Panhandle Inc. CHESAPEAKE EXPLORATION LLC

McPet 1971 APACHE CORP.

MCR Oil Corp. of Texas 1980 UMC PETROLEUM CORP.

McRae Consolidated Oil & Gas, Inc. 1983 DALEN RESOURCES OIL & GAS CO.

McRae Oil & Gas CHEVRON

MDF Technology, Inc. CONOCOPHILLIPS

MDU Resources Group Inc. FIDELITY OIL CO.

Meadowview, Inc. see Dominion Exploration & Production

Medallion TRANSAMERICAN NATURAL GAS CORP.

MEDALLION CALIFORNIA PROPERTIES

Medallion Gas Services, Inc. KCS RESOURCES, INC.

Medallion Production Co. KCS RESOURCES, INC.

Medicine Bow Operating Co. EL PASO E&P COMPANY, LP

Memorial Resource Development Corp RANGE RESOURCES LOUISIANA, INC

Mendota Oil Co. 1969 APACHE CORP.

Merger Corporation 1948 Henderson Clay Products

Meridian Aggregates Company CONOCOPHILLIPS

Meridian Gold Company CONOCOPHILLIPS

Meridian Industrial Minerals Co. CONOCOPHILLIPS

Meridian Minerals Company CONOCOPHILLIPS

Meridian Oil Co CONOCOPHILLIPS

Meridian Oil Frontera CONOCOPHILLIPS

Meridian Oil Gathering Inc. CONOCOPHILLIPS

Meridian Oil Inc. (Wisconsin) CONOCOPHILLIPS

Meridian Oil Marketing CONOCOPHILLIPS

Meridian Oil Offshore Acquisition Co. CONOCOPHILLIPS

Meridian Oil Offshore Inc. CONOCOPHILLIPS

Meridian Oil Pipeline Inc. CONOCOPHILLIPS

Meridian Oil Production Inc. CONOCOPHILLIPS

Meridian Oil Production Inc. (Wisconsin) CONOCOPHILLIPS

Meridian Oil Services Inc. CONOCOPHILLIPS

Meridian Oil Storage CONOCOPHILLIPS

Meridian Oil Trading Inc. CONOCOPHILLIPS

Meridian Oil Transportation Inc. CONOCOPHILLIPS

Meridian Petroleum Holding Inc. CONOCOPHILLIPS

Meridian Power Inc. CONOCOPHILLIPS

Merlin Petroleum Co. 1989 * GULF EXPL CONSULTANTS INC.

Merrico Acquisition 1987-NYL

Merrit Oil 1928 CONOCOPHILLIPS

Mesa Limited Partnership * PIONEER NATURAL RESOURCES USA,

Mesa Operating Co. PIONEER NATURAL RESOURCES USA,

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

49

Mesa Petroleum Co. PIONEER NATURAL RESOURCES USA,

MGF Drilling Co. KAISER-FRANCIS OIL CO.

MGF Mansfield, Inc. KAISER-FRANCIS OIL CO.

MGF Oil Corp. 1/94 KAISER-FRANCIS OIL CO.

MGF Production Co. KAISER-FRANCIS OIL CO.

MGF Supply Co. KAISER-FRANCIS OIL CO.

MGS Development Co. SUNDOWN ENERGY INC.

Mid Louisiana Gas Company 1987 BASF CORP/WINTERSHALL ENERGY

MID-AMERICA ENERGY CO.

Mid-American Investment Corporation see Dominion Exploration & Production

Mid-American Petroleum, Inc 1986 HUNTER RESOURCES, INC.

MidCon Exploration Co.-Gulf Coast 1986 DAVIS OIL CO. (DAVIS PETRO CORP.)

MidCon Exploration Co.-Gulf Coast 1986 APACHE CORP.

Midcontinent Acquisition Properties SUNDOWN ENERGY INC.

Mid-Continent Petroleum Corp. 1955 SUNOCO PARTNERS MKTG & TERMI-

Middle Bay Oil Co., Inc. PXP GULF COAST, INC.

Middle States Petroleum 1958 see Tenneco Inc

MIDGARD ENERGY COMPANY

Mid-Gulf Drilling Corp. RANGE ENERGY CORP.

Midhurst Oil Corp. ASHLAND OIL CO.

Mid-Kansas Oil & Gas Co. 1916 MARATHON PETROLEUM CO.

Midland Oil Company 1961 CONSOLIDATED OIL & GAS, INC.

Midlands Energy Co. 1984 FREEPORT-MCMORAN INC.

Mid-Tex Oil & Gas GROVE OIL & GAS

Midway Oil Co. 1905 DEVON SFS OPERATING, INC.

Midway Six Oil Co. 1910 BP AMERICA

Midwest Exploration Co. 1930 BP AMERICA

Midwest Oil Co. 1974 BP AMERICA

Midwest Production Co. 1958 see Dominion Exploration & Production

Midwest Refining Co. 1921 BP AMERICA

Midwest Resources, Inc. MID-AMERICA ENERGY CO.

MILAGRO EXPLORATION

Mile High Properties Inc. LONGVIEW ENERGY COMPANY

Miles Petroleum Inc OXFORD CONSOLIDATED, INC.

Milestone Petroleum, Inc. 1985 CONOCOPHILLIPS

Millane, Inc. (Assets) IMPERIAL OIL COMPANY OF CALIFOR-

Millican Oil Co. ANADARKO E&P COMPANY, LP

Minatome Corp. 1987 Name Change Only ENERGEN RESOURCES CORP.

Minden Oil & Gas Inc. 1985 CASTLE ENERGY CORP.

Minnehoff Oil Co. 1912 Shell Oil Co.

Minnehoma Oil Co. CHEVRON

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

50

Mission Development CHEVRON

Mission E & P, LP PETROHAWK PROPERTIES, LP

Mission Holdings, LLC PETROHAWK PROPERTIES, LP

MISSION RESOURCES PARTNERS LP

Mission Resources Corp. PETROHAWK PROPERTIES, LP

Mission Resources Inc. 1987 MISSION RESOURCE PTNR LP

Mississippi River Corp. NATURAL GAS & OIL

MISSOURI RIVER LP managed by AVIVA

Mistal, Inc. TOTAL E&P USA INC

Mitchell & Mitchell Gas & Oil Corp. 1971 DEVON ENERGY

Mitchell Energy DEVON ENERGY

MKI ENERGY, INC.

Mobil Oil Corporation EXXON MOBIL CORPORATION

Mobil Seeligson SUNOCO PARTNERS MKTG & TERM-

Mobil-GC EXXON MOBIL CORPORATION

Moha Petroleum Okla., Inc. CHESAPEAKE ORC, LLC

Mohawk Petroleum PETER BOSCH

Monarch Royalty Corp. 1959 DEVON ENERGY

MONCRIEF OIL INTERESTS

Monday Oil Co. 1946 CHEVRON

Monsanto Company 1972 LION OIL TRADING & TRANSPORTA-

Monsanto Oil Co. 1986 BHP PETROLEUM (AMERICAS) INC.

Montana Power Co. ENCANA ENERGY

Montara Petroleum Co. NORD-MONTARA PETROLEUM CO.

Monte Carlo Exploration Inc. REBEL EXPLORATION INC.

Montecito Corp. FORCHALL OIL

Montejas Energy Resources, Inc. 1984 SEAHAWK OIL INTERNATIONAL, INC.

Monterey Oil Co. 1960 EXXON MOBIL CORP.

Montex Exploration Co. 1957 see Dominion Exploration & Production

Montoya Oil Co. 1952 FELMONT OIL CORP.

Moore McCormack Energy, Inc. 1988 NEXEN PETROLEUM U.S.A. INC.

MORAINE PRODUCTION LTD.

Moran Energy Inc. 1984 ANADARKO E&P COMPANY, LP

Morgan Development, Inc. KERR-MCGEE CORP.

Morgan Gulf Co. BP AMERICA

Morgan Resources, Inc. KERR-MCGEE CORP.

Mormac Energy Corp. 1983 ENCINO ENERGY & DEV CORP.

Moseley Petroleum Co. HESS CORPORATION

MOSS PETROLEUM

Mound Co. 1963 * BHP PETROLEUM (AMERICAS) INC.

Mountain & Plains Oil Co. 1980 DEVON ENERGY

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

51

Mountain Front RANGE RESOURCES

Mountain Fuel Supply 1985 QUESTAR CORP.

Mountain States Oil Co. 1919 CONOCOPHILLIPS

Moxa Energy Corp. 1984 ILEX OIL CORP.

M-R Holdings Acquisition Company CONOCOPHILLIPS

M-R Holdings Inc. CONOCOPHILLIPS

M-R Holdings Inc. No 1 CONOCOPHILLIPS

M-R Holdings Inc. No 2 CONOCOPHILLIPS

M-R Holdings Inc. No 3 CONOCOPHILLIPS

M-R Holdings Inc. No 4 CONOCOPHILLIPS

M-R Holdings Inc. No 5 CONOCOPHILLIPS

M-R Holdings Inc. No 6 CONOCOPHILLIPS

M-R Holdings Inc. No 7 CONOCOPHILLIPS

MRD Operating LLC RANGE LOUISIANA OPERATING, LLC

MRT Exploration Co. 1983 ANADARKO E&P COMPANY, LP

Mt. Diable Corp. 1964 CHEVRON

MTrust Corp., N.A. AMERITRUST TEXAS, N.A.

Multistates Oil Properties PIONEER NATURAL RESOURCES USA,

Murchison Trusts 1957 see Dominion Exploration & Production

Murphy Oil Company CHEVRON U.S.A. INC.

MURPHY OIL CORP.

Murvale Company/Murvale Oil Company CHEVRON U.S.A. INC.

Muskeg Oil Co. BP AMERICA

Mutual Oil Co. 1928 CONOCOPHILLIPS

MW Petroleum Corp. APACHE CORP.

MWJ Producing Co. OCOTILLO

MWJR Petroleum Corp. APACHE CORP.

N.G. Penrose PENROSE PRODUCTION CO.

NABORS DRILLING USA, LP

NAFCO Oil & Gas, Inc. CHEVRON

NANCE PETROLEUM CORPORATION

Nanome Aggregates Inc. CONOCOPHILLIPS

NARECO Corporation GLOBAL NATURAL RESOURCES CORP.

Nat Hunter Producing Co. 1931 BP AMERICA

National Energy Group, Inc. SANDRIDGE ENERGY, INC.

National Exchange, Inc. CONOCOPHILLIPS

NATIONAL FUEL GAS CO.

National Oil Co. 1974 Shell Oil Co.

National Oil Co. 1985 FREEMONT ENERGY CORP.

National Petroleum Co. 1915 BP AMERICA

National Petroleum Corp. of Tampa 1960 MURPHY OIL CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

52

Natol Petroleum Corp. DAMSON OIL CORP.

Natomas Co. 1983 MAXUS ENERGY CORP.

Natomas North America MAXUS EXPLORATION

Natomas North America APACHE CORP.

NATURAL GAS & OIL

Natural Gas and Oil Corporation * TOTAL E&P USA INC

Natural Gas Clearinghouse TARGA RESOURCES

Natural Gas Producing Co. 1983 EXXON MOBIL CORP.

Natural Reserves Inc. 1984 AMERICAN RESOURCES INC.

Natural Resource Management Corp Sandridge Energy

Natural Resources Corp. of Texas GLOBAL NATURAL RESOURCES CORP.

Natural Resources Corporation GLOBAL NATURAL RESOURCES CORP.

Navarro Oil Co. CONOCOPHILLIPS

Navidad Oil & Gas Co. BOLTEX OIL & GAS CO.

NCI-Shawnee, LP PETROHAWK PROPERTIES, LP

Neely & Neely IRION MOUNTAIN OIL CO.

NEG Oil & Gas LLC SANDRIDGE ENERGY, INC.

Nelson Petroleum Co. SAMSON PROD SERVICES COMPANY

NELSON R. THOMAS

NERCO OIL & GAS

NEUMIN PRODUCTION CO.

New Britain, Ltd PETER PAUL PETROLEUM CO., GEN.

New York Life Oil & Gas Production Partner- see Dominion Exploration & Production

NEWFIELD EXPL MID-CONTINENT INC.

NEWFIELD EXPLORATION GULF COAST,

Newmark Resources 1977 TRINITY RESOURCES, INC.

NEWMONT OIL CO.

Newmont Oil Co. 1988 * EXXON MOBIL CORP.

NFC Petroleum Corp. KAISER-FRANCIS OIL CO.

NGC Energy Company 1989 DALEN RESOURCES OIL & GAS CO.

NIKLOS OIL & GAS CO.

Niklos Oil & Gas Co. 1987 see Dominion Exploration & Production

Ninian Oil Co. 1989 see Dominion Exploration & Production

Ninian Oil Finance Corp. HIGHMOUNT EXPLORATION & PRODUC-

Ninian Oil Holding Company see Dominion Exploration & Production

Noarko Resources Inc. 1986 WICHITA RIVER OIL CO.

Noble Energy Production, Inc. NOBLE ENERGY, INC.

Nor-Am Exploration Corp. RED EAGLE RESOURCES CORP.

Noram Petroleum, L.L.C. CHAPARRAL ENERGY, L.L.C.

NORD-MONTARA PETROLEUM CO.

Nordon Oil Corp. 1969 TEXAS INTERNATIONAL PETROLEUM

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

53

Norfitt FINA OIL & CHEMICAL CO.

Norfolk Energy Inc. 1993 UMC PETROLEUM CORP.

NORMANDY OIL & GAS CO.

Nortex Gas & Oil Co. 1983 EOG RESOURCES, INC.

North American Oils Consolidated 1950 CONOCOPHILLIPS

North American Resources Corp. ENCANA ENERGY

NORTH AMERICAN ROYALTIES, INC.

North Block Gas AVEN GAS & OIL, INC.

North Central Oil Corp. PLAINS EXPLORATION & PRODUCTION

North Star JOHN P. MCNAUGHTON

North Timbers Oil, LP XTO ENERGY INC.

Northeast Energy Development Corp. GREAT AMERICAN RESOURCES, INC.

Northern Michigan Exploration Co. NEWFIELD EXLP MID-CONTINENT INC.

Northern Natural Gas Co., E&P Division EOG RESOURCES, INC.

Northern Plains Railroad Company CONOCOPHILLIPS

Northern Rockies Pipe Line Co. CONOCOPHILLIPS

Northlander Oil Company 1974 TOTAL E&P USA INC

NORTHSTAR OPERATING CO.

NORTHSTAR RESOURCES, INC.

Northwest Energy 1983 WILLIAMS EXPLORATION CO.

Northwest Exploration Company 1986 * TOTAL E&P USA INC (50%)

Northwest Production Corporation CONOCOPHILLIPS

Norwalk Oil Co. 1950 CONOCOPHILLIPS

Nova Petroleum Corp. 1985 NOVA RESOURCE, INC.

NOVA RESOURCE, INC.

Noyly Development Co. 1953 CHEVRON

NRM ENERGY LIMITED PARTNERSHIP

NRM Operating Company, L.P. NATURAL RESOURCE MGMT CORP.

NRM Petroleum Corp. NATURAL RESOURCE MGMT CORP.

Nucorp Energy Inc. BRIDGE OIL COMPANY, L.P.

Nuevo Energy Corp. PLAINS E & P CO.

NUGGET OIL CORP.

NUMAC RESOURCES

Nu-West Dvlpmt. (U.S. Assets) 1984 * FREEPORT-MCMORAN

Nu-West Dvlpmt. (U.S. Assets) 1984 * TRANSCO EXPLORATION PARTNERS

Nylife Resources Inc. see Dominion Exploration & Production

O.A. Sutton 1962 CHEVRON

O.G.I. Oil & Gas, Inc. 1984 DEVON ENERGY

OCCIDENTAL OIL & GAS CORP.

OCCIDENTAL PERMIAN LP (SEE OXY)

OCCIDENTAL TRANSACTION 1, LLC

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

54

OCEAN DRILLING & EXPLORATION CO.

Ocean Energy Inc. (Houston) DEVON ENERGY PROD. CO, LP

Ocean Oil & Gas OCEAN DRILLING & EXPLORATION CO.

Oceana Exploration Co LC VICTORY ENERGY PARTNERS LLC

Oceanic Oil PRODUCING PROPERTIES

Ocelot Oil Co. EOG RESOURCES, INC.

OCOTILLO

OCTOBER OIL CO.

Odessa Natural Corp. CONOCOPHILLIPS

Odessa Natural Gasoline Company CONOCOPHILLIPS

Odessa Pipeline Company CONOCOPHILLIPS

Odyssey Energy Inc. 1984 TRAFALGAR HOUSE OIL & GAS INC.

Odyssey Petroleum Co. PETROHAWK PROPERTIES, LP

Odyssey Petroleum Company HAMPTON RESOURCES CORP.

Offshore Exploration Oil Co. OXOCO INC.

Ohio L & M Co., Inc. 1988 ALLIANCE PETROLEUM CORP.

Ohio Oil Co. 1962 MARATHON PETROLEUM CO.

Oil & Gas Properties CHEVRON

Oil Center Operating Inc. PENT ENERGY, LLC

OIL CITY PETROLEUM INC.

Oil Development Co. of Texas 1978 DEVON SFS OPERATING, INC.

Oil Development Co. of Utah 1978 DEVON SFS OPERATING, INC.

Oil Drilling, Inc 1963 DEVON ENERGY

Oil State Petroleum Co. 1922 EL PASO E&P COMPANY, LP

Oilman's Properties, Inc. ALAMEDA ENERGY, INC.

Oklahoma Natural Gas Co. ONEOK EXPLORATION CO.

Oklahoma Pacific, Ltd. PETER PAUL PETROLEUM CO., GEN.

Old Dominion Oil Corp. 1983 RATEX RESOURCES INC.

Old Maynard Corporation FOREST OIL PERMIAN CORP.

Old Ocean Oil Co. 1954 BP AMERICA

Oleum Incorporated MAXUS EXPLORATION

Olin Oil & Gas Corp. 1962 EXXON MOBIL CORP.

OLIX ENERGY

Olix Industries, Inc. 1981 DEVON ENERGY

Olsen & Jal SUNOCO PARTNERS MKTG & TERM-

Olympia Drilling Programs 1980 MAGIC CIRCLE ENERGY CORP.

One Liberty Oil Co. 1988 PIONEER NATURAL RESOURCES USA,

ONEOK Beta Co. TXOK ENERGY RESOURCES CO.

ONEOK Energy Resources Co. TXOK ENERGY RESOURCES CO.

ONEOK Exploration Co. CHESAPEAKE ORC, LLC

ONEOK Resources Co. CHESAPEAKE ORC, LLC

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

55

ONEOK Exploration Co. 1980 ONEOK EXPLORATION CO.

Onshore Exploration LAMSON/ONSHORE PETROLEUM CORP.

Onyx Oil Co. 1981 DEVON ENERGY

Orbit Energy, Inc. ORBIT PETROLEUM, INC.

ORIGINALA PETROLEUM CORP.

Orion 1981 Royalty Fund, Ltd. GLOBAL NATURAL RESOURCES CORP.

Orion Louisiana Royalty Fund GLOBAL NATURAL RESOURCES CORP.

Orion Petroleum, Inc. GLOBAL NATURAL RESOURCES CORP.

Orion Petroleum, Ltd. GLOBAL NATURAL RESOURCES CORP.

ORS CORP.

Oryx Energy Company KERR-MCGEE CORP. ONSHORE LP

Osage Milestone Petroleum CONOCOPHILLIPS

Osage Oil Co. CONOCOPHILLIPS

Osage Oil Co. 1901 OCCIDENTAL OIL & GAS CORPORATION

Osmond Oil Company 1968 Dissolved TOTAL E&P USA INC

Overland Energy, Inc. 1983 EAGLE EXPLORATION CO.

Overthrust Resources, Ltd. 1986 POLARIS RESOURCES, INC.

Owl Petroleum Co. 1986 ANADARKO E&P COMPANY, LP

OXFORD CONSOLIDATED, INC.

Oxley Petroleum CHESAPEAKE ORC, LLC

OXOCO INC.

OXY RESOURCES CALIFORNIA, LLC

OXY USA INC.

OXY USA WTP, LP

P & O Oil Corp. 1980 CONOCOPHILLIPS

Pacific Energy Investments, Inc. KERR-MCGEE CORP.

Pacific Energy Investments, N.V. KERR-MCGEE CORP.

Pacific Energy Ventures KERR-MCGEE CORP.

Pacific Enterprises ABC Corp. PEC MINERALS, LP

Pacific Enterprises Oil & Gas HUNT OIL COMPANY

Pacific Enterprises Oil Co. (USA) HUNT OIL COMPANY

Pacific Enterprises Roy. Co. 1990 PACIFIC ENTERPRISES OIL CO. (USA)

Pacific Enterprises Royalty Company SABINE ROYALTY TRUST

Pacific Federal Ventures KERR-MCGEE CORP.

Pacific Lighting Oil & Gas 1987 PACIFIC ENTERPRISES OIL & GAS

Pacific Oil & Gas Development Corp. CALLON PETROLEUM CO.

Pacific Union TEXAS AMERICAN OIL CORP.

Pacific Western Oil Corp. 1956 CHEVRON

Packaging Research Corporation 10/93 HEADINGTON INVESTMENTS, INC.

Paladin Petroleum Corp. 1987 * ENERGY DEVELOPMENT PARTNERS

Palm Petroleum Corp. DAMSON OIL CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

56

Palmer Oil Co. see Tenneco Inc

Pan American Petroleum Corp. BP AMERICA

Pan Ocean Oil Corp. 1976 MARATHON PETROLEUM CO.

Pan Oil Co. 1972 DAMSON OIL CORP.

PanCanadian Energy Corp. ENCANA CORP.

PanCanadian Energy Holdings, Inc. ENCANA ENERGY HOLDINGS, INC.

PanCanadian Energy Resources, Inc. ENCANA ENERGY RESOURCES, INC.

Pan Canadian Energy Services Inc. ENCANA ENERGY SERVICES INC.

PanCanadian Gulf of Mexico, Inc. ENCANA GULF OF MEXICO

PanCanadian Heritage Lands ENCANA HERITAGE LANDS

PanCanadian Midstream, Inc. ENCANA MIDSTREAM INC.

PanCanadian Midstream, Ltd. ENCANA MIDSTREAM, LTD

PANCANADIAN PETROLEUM CO.

PanCanadian Resources ENCANA RESOURCES

PanEnergy Field Services, Inc. DUKE ENERGY FIELD SERVICES, INC.

Pan Energy Transport and Trading Co. TEPPCO CRUDE OIL LP

Pangea Petroleum Co. 1987 HARCOR ENERGY, INC.

Panhandle Eastern Exploration Co. 1987 ANADARKO PETROLEUM CORPORA-

Panhandle Oil Corp. 1956 TOTAL E&P USA INC

Pantano WESTERN

Panterra Petroleum NANCE PETROLEUM CORP.

panther energy company EAGLE ENERGY ACQUISITIONS LP/

Paova Oil Co. 1912 Shell Oil Co.

Paraffine Oil Co. EXXON MOBIL CORP.

Paraffine Oil Corp. 1981 WILLIAMS EXPLORATION CO.

Parallel Petroleum Corporation PARALLEL PETROLEUM LLC

Park Oil & Gas Inc. MARTIN EXPLORATION CORP.

Parker & Parsley Petroleum Co. PIONEER NATURAL RESOURCES USA,

Parker Oil ANADARKO E&P COMPANY, LP

Parrent Oil & Gas 1983 QUADRANT RESOURCES INC.

Parris Oil Co. 1912 Shell Oil Co.

Parten Operating Inc. FARMERS OIL COMPANY

PARTNERS OIL CO.

Pasco Oil Properties 1975 BP AMERICA

Pate Oil Co. 1959 EXXON MOBIL CORP.

PATHFINDER PETROLEUM CORP.

Patina BNR Corporation NOBLE ENERGY, INC.

Patina Oil & Gas Corporation NOBLE ENERGY, INC.

Patina Oklahoma Corp. NOBLE ENERGY, INC.

Patina San Juan Incorporated NOBLE ENERGY, INC.

PATRICK PETROLEUM CO.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

57

Patrick Petroleum Co. 1984 * ANADARKO E&P COMPANY, LP

Patrick Petroleum Corp. UNIT PETROLEUM CORP.

Patrick-Bayou Resources UNIT PETROLEUM CORP. (50%)

Patrick-Bayou Resources NEWFIELD EXPL MID-CONTINENT INC.

Pauley Petroleum Inc. 1987 HONDO OIL & GAS CO.

Pauline P Lambe KOCH EXPLORATION COMPANY, LLC

Pax Investment Corp. HESS CORPORATION

P'Bell Energy Co. SUNDOWN ENERGY INC.

PCTC - Oregon, Inc. CONOCOPHILLIPS

PCTC - Skykomish, Inc. CONOCOPHILLIPS

PCTC, Inc. CONOCOPHILLIPS

PCU Inc. of Texas 1985 LUCK PETROLEUM CORP.

Peachtree Production Co. PLAINS RESOURCES, INC.

Peake Petroleum Co. 1964 EL PASO E&P COMPANY, LP

Pecos Company CONOCOPHILLIPS

Pecos Exploration ANADARKO E&P COMPANY, LP

Peerless Oil & Gas PRIMARY FUELS, INC.

Peerless Oil Corporation 1966

Pel-Tex Co., Inc. 1986 FREEPORT-MCMORAN

Pelto Oil Co. 1989 ENERGY DEVELOPMENT CORP.

Pend Oreille Oil & Gas Corp. SAMSON PROD SERVICES COMPANY

PENINSULA RESOURCES CORP.

PENN VIRGINIA CORP.

Penn Virginia MC Energy, LLC PENN VIRGINIA CORP.

Pennmark Operating Company PENNMARK RESOURCES COMPANY

Pennmark Production Company ELAND ENERGY, INC.

PENNMARK RESOURCES COMPANY

Penntex Petroleum Co. CHEVRON

Pennzenergy DEVON ENERGY

Pennzoil Exploration & Prod. Co. DEVON ENERGY

Pennzoil Producing Co. DEVON ENERGY

PENROSE PRODUCTION CO.

PENT ENERGY, LLC

Permian Basin Trust CONOCOPHILLIPS

Permian Resources Holding Inc. CHESAPEAKE EXPLORATION LLC

Perot Family Trust BRIDGE OIL COMPANY, L.P.

Perry R. Bass, Inc. CHISHOLM TRAIL VENTURES, LP

Perry R. Bass, Trustee BMT O&G (WY)(LA)(MULTI-STATE) L.P.

PETER BOSCHE

Petex-Wiser Corporation THE WISER OIL CO.

Petra Resources, Inc 1986 MUSTANG RESOURCES CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

58

Petro Gas Producing Company 1978 TOTAL E&P USA INC

Petro Search Alpha Ltd. Series 1973-l HESS CORPORATION

Petro Search Exploration Corp. HESS CORPORATION

PETRO SOURCE PARTNERS LTD.

Petro-Atlas 1958 TOTAL E&P USA INC

PETRO-CANADA RESOURCES USA INC.

PetroCorp Acquisition Co. UNIT CORP.

Petrocorp, Inc. UNIT CORP.

Petrodel Exploration, Inc. 1988 PETROFINA DELAWARE, INCORPO-

Petro-Dynamics, Inc. 1973 HESS CORPORATION

PETROFINA DELAWARE, INCORPORATED

Petrofina Exploration, Inc. 1985 TOTAL E&P USA INC

PETROFINA GAS PIPELINE COMPANY

Petrofina Trading Service, Lt. 1987 TOTAL E&P USA INC

Petrohawk Properties LP BHP BILLITON PETROLEUM PROPER-

Petroleum Corp. of Texas DAMSON OIL CORP.

Petroleum Corp. of Texas 1984 BRECKENRIDGE OPERATING CO.

Petroleum Development Corp (Dallas) 1986 PRESIDIO OIL CO.

Petroleum Exploration THE WISER OIL CO.

Petroleum Exploration, Inc. 1964 PIONEER NATURAL RESOURCES USA,

Petroleum Resources Company 9/94 BISON ENERGY CORP.

Petroleum Technical Services FOREST OIL CORP.

Petro-Lewis Corp. 1987 FPCO OIL & GAS CO.

PETROMARK RESOURCES CO.

Petrominerals Corp. 1986 MCFARLAND ENERGY INC.

PetroTide, Ltd. PETER PAUL PETROLEUM CO., GEN.

PetroTiger I, II, III, Ltd. PETER PAUL PETROLEUM CO., GEN.

PetroVentures Expl. Co. SUNDOWN ENERGY INC.

Petrus Oil Company BRIDGE OIL COMPANY, L.P.

Peyton Oil & Gas, Inc. PEYTON HOLDINGS CORP.

Peyton Holdings Corp. PEYTON ROYALTIES, LP

PG&E Resources Company DALEN RESOURCES OIL & GAS CO.

Phillips Oil Co. CONOCOPHILLIPS

Phillips Petroleum Co. CONOCOPHILLIPS

Phoenix Oil Co. 1901 OCCIDENTAL OIL & GAS CORPORATION

PHOENIX OPERATING CO.

Phoenix Resources Co. 1982 TEXAS INTERNATIONAL PETROLEUM

Phoenix Resources, Inc. 1987 ENERGEN RESOURCES CORP.

PICKENS ENERGY CORPORATION

Pickens Financial Group, Ltd. PICKENS ENERGY CORPORATION

Pickens Resource Corp. PICKENS ENERGY CORPORATION

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

59

Piedmont Petroleum SOUTHWESTERN PRODUCTION CORP.

Pierce Petroleum Corp. c.1930 BP AMERICA

Pilgrim Drilling Co. KAISER-FRANCIS OIL CO.

Pilgrim Exploration Corp. AMERICAN ENERGY EXPLORATION

Pin Oak Petroleum, Inc. BRIDGE OIL COMPANY, L.P.

Pinaga Inc. 1986 PIONEER NATURAL RESOURCES USA,

Pincher Creek Ranch CONOCOPHILLIPS

PIONEER NATURAL RESOURCES USA INC.

Pioneer Oil Company CHEVRON U.S.A. INC.

Pioneer Production Corp. 1986 PIONEER NATURAL RESOURCES USA,

Pittencreiff America, Inc TALISMAN ENERGY USA INC

Placer Energy Corp. EAGLE OIL & GAS CO

Placid Oil Co. OCCIDENTAL

Plains Exploration & Production Company FREEPORT-MCMORAN OIL AND GAS

PLAINS MARKETING, LP

Plains Petroleum Co. WILLIAMS PRODUCTION RMT CO

PLAINS RESOURCES, INC.

Planet Oil & Mineral Corp. 1975 PACIFIC ENERPRISES OIL CO. (USA)

PLANTATION PETROLEUM ACQUISITION

Platco Corp. 1967 TEXAS INTERNATIONAL PETROLEUM

Plateau Petroleum, Inc. 1984 DEVON ENERGY

Plato DEVON ENERGY

Plaza Petroleum Inc. 1973 BROCK EXPLORATION CORP.

Plum Creek Timber Company CONOCOPHILLIPS

Plymouth Oil Co. 1962 MARATHON OIL COMPANY

PMOG Holdings, Inc. RANGE RESOURCES

Pogo Energy, Inc. PLAINS EXPLORATION & PRODUCTION

Pogo Panhandle 2004, LP PLAINS EXPLORATION & PRODUCTION

Pogo Producing (Texas Panhandle) Co. PLAINS EXPLORATION & PRODUCTION

POLARIS RESOURCES INC.

Pollack Petroleum Inc. 1984 HARCOR ENERGY, INC.

Polumbus Co. SAMSON PROD SERVICES COMPANY

Poppy Oil Co. 1954 CONOCOPHILLIPS

Porta-Bello, Inc. 1981 RATEX RESOURCES INC.

Posse Petroleum, Ltd. PETER PAUL PETROLEUM CO., GEN.

Post Petroleum Co., Inc. 1988 * PRESIDIO OIL CO.

Potestas Corporation CHESAPEAKE EXPLORATION LLC

Power Resources 1985 NOVA RESOURCE, INC.

PPPCo.One Oil Company, Ltd. PETER PAUL PETROLEUM CO., GEN.

Prado Oil Co. 1965 DALEN RESOURCES OIL & GAS CO.

Prairie Oil & Gas Co. 1932 BP AMERICA

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

60

Prairie Producing Company UNION OIL CO. OF CALIFORNIA

Precise Exploration Corp. 1973 BROCK EXPLORATION CORP.

Presidio Exploration PRESIDIO OIL COMPANY

PRESIDIO OIL CO.

Presidio Operating Co. E.E. NEARBURG

Presidio West Virginia PRESIDIO OIL COMPANY

Preston Oil HUNT PETROLEUM (AEC), INC.

Prima Energy Corp. PETRO-CANADA RESOURCES USA INC

Prima Oil & Gas Co. PETRO-CANADA RESOURCES USA INC

PRIMARY FUELS, INC.

Primary Natural Resources, Inc. NEWFIELD EXPLORATION MID-

Princeville Corporation 1977 CONSOLIDATED OIL & GAS, INC.

Pine Mountain RANGE RESOURCES

Prize Energy MAGNUM-HUNTER RESOURCES, INC.

Prochemco HESS CORPORATION

Producers & Refiners Corp. 1934 BP AMERICA

Producers Oil Co. 1917 CHEVRON

PRODUCING PROPERTIES

Program Acquisition Co. PETROHAWK PROPERTIES, LP

Progress Petroleum Shell Oil Co.

Proton Energy, Inc. PETROHAWK PROPERTIES, LP

PRS Offshore, Inc. CHEVRON MIDCONTINENT, LP

Prudential Drilling Co. 1986 NEXEN PETROLEUM U.S.A. INC.

Prudential Minerals Exploration Corp. SAMSON PROD SERVICES COMPANY

Prudential Minerals Inc. CONOCOPHILLIPS

Prudential Oil & Gas Co. 1987 NEXEN PETROLEUM U.S.A. INC.

Prudential-Bache (Partial Buyout) 11/93 DOMINION OKLA. TEXAS EXPLOR. &

PSEC, Inc. CHESAPEAKE ORC, LLC

Pubco Petroleum Corp. 1973 PIONEER NATURAL RESOURCES USA,

Publishers Petroleum 1979 CONOCOPHILLIPS

Pure Oil Co. 1965 CHEVRON CORP.

Pure Resources, LP CHEVRON MIDCONTINENT, LP

PXP GULF COAST, INC.

PYRAMID OIL CO.

PYRO ENERGY CORP.

QUADRANT RESOURCES INC.

Quaker Oil Co. 1919 ASHLAND OIL CO.

Quanah Petroleum Inc. 1983 DEVON ENERGY

QUEENSTOWN OIL AND GAS, INC. managed by AVIVA

QUEENSTOWN ROYALTY COMPANY LP managed by AVIVA

QUEENSTOWN ROYALTY II LP managed by AVIVA

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

61

Questa Oil & Gas Co. UNIT CORPORATION

Questar Corp. QEP ENERGY COMPANY

Questar Exploration & Production QEP ENERGY COMPANY

Quinoco Petroleum, Inc. 1989 CHEVRON

Quinstar Oil Inc. 1984 PLAINS PETROLEUM CO.

Quintana Petroleum Corp. (LA Properties) CONOCOPHILLIPS

Quintana Petroleum Corp. (TX Properties) HILCORP ENERGY COMPANY

Quintuple Oil Co. 1912 Shell Oil Co.

R. Hailey CONOCOPHILLIPS

R.W. Fair Foundation 1975 * TOTAL E&P USA INC

R.L. Burns Corp. 1981 PYRO ENERGY CORP.

R.T. Collier Corp. 1957 CHEVRON CORP.

Rainbow Pipe Line Company FARMERS OIL COMPANY

Rainbow Resources, Inc. 1978 WILLIAMS EXPLORATION CO.

Ralph Nix Oil Co. RALPH NIX, A PARTNERSHIP

RALPH NIX, A PARTNERSHIP

RAM Energy, Inc. Halcon Holdings, Inc.

RAM Energy, LLC OVAL ENERGY LLC

Romarco, Inc. WILHELM RESOURCES, INC.

Ramco Operating Co. RAM ENERGY INC

Ramco-NYL 1987 Ltd. Part. RAM ENERGY INC

RANGE ENERGY I, INC.

RANGE ENERGY SERVICES CO.

RANGE GAS CO

RANGE GATHERING & PROS. CO

RANGE OFFSHORE LP

Range Operating Co. GREAT LAKES ENERGY PARTNERS LLC

RANGE PIPELINE SYSTEMS LP

RANGE PRODUCTION CO

RANGE RESOURCES CORP.

Range Resources Dev. Corp. GREAT LAKES ENERGY PARTNERS LLC

RANGE RESOURCES LLC

Ranger FRAZIER

RATEX RESOURCES, INC.

RB Operating Inc. RAM ENERGY INC

RDH Enterprices Inc CHESAPEAKE EXPLORATION LLC

Reading & Bates, Inc. 1988 RAM ENERGY INC

Reading Minerals Co. GLOBAL NATURAL RESOURCES CORP.

Real Petroleum BHP PETROLEUM (AMERICAS) INC.

Reb Petroleum 1980 CAYMAN RESOURCES CORP.

REBEL EXPLORATION INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

62

REBELLION ENERGY, LLC CAMINO NATURAL RESOURCES, LLC

Red Diamond Oil Co. see Tenneco Inc

Red Eagle Exploration Co. 1987 RANGE RESOURCES - APPALACHIA,

Red Eagle Resources Corp. RANGE RESOURCES - APPALACHIA,

RED ROCK ROYALTY LP managed by AVIVA

Redfern Oil Co. 1970 KERR-MCGEE CORP.

Redstone Oil & Gas NEWFIELD EXPL MID-CONTINENT INC.

Reef Energy 1987 GENERAL ENERGY RES & TECH CORP.

Reef Petroleum Corp. SAMSON PROD SERVICES COMPANY

Regal Oil 1954 CONOCOPHILLIPS

Reichhold Energy Corp. 1985 BP AMERICA

Reily Oil MARTIN EXPLORATION CORP.

Reiter-Foster BARUCH-FOSTER CORP.

RELIANCE ENTERPRISES, INC.

Reliance Oil Co. 1917 EXXON MOBIL CORP.

Reno Oil Co. 1953 see Tenneco Inc

Renwar Oil Corp. 1960 see Tenneco Inc

Republic Natural Gas Co. 1961 EXXON MOBIL CORP.

Republic Petroleum Corp. 1949 CONOCOPHILLIPS

Research Applications Inc. CONOCOPHILLIPS

RESERVE INDUSTRIES INC.

Reserve Oil & Gas Co. 1980 CHEVRON

Reserve Oil & Minerals Corp. 1987 RESERVE INDUSTRIES INC.

RESOLUTE ENERGY, INC.

REVC Holdco, LLC RANGE HOLDCO, INC.

R-H Holdings Corporation CONOCOPHILLIPS

Rial Oil Co. 1980 SAGE ENERGY CO.

Riata Energy, Inc. SANDRIDGE ENERGY, INC.

Richardson & Bass BASS ENTERPRISES PRODUCTION CO.

Richardson Petroleum see Tenneco Inc

Richfield Oil Corp. 1966 BP AMERICA

Ridgeway Exco Inc. 1985 TAURUS PETROLEUM INC.

Ridgeway Oil Expl. & Dvlpmt. Corp. 1985 TAURUS PETROLEUM INC.

Riner Exploration Corp. 1983 TEXON ENERGY CORP.

Rio Grande Oil Co. 1937 BP AMERICA

RIO PETROLEUM INC.

Risk Exploration, Inc. KISKA OIL CO.

Rival Resources Inc. QUESTA OIL & GAS CO.

River Corporation 1973 * TOTAL E&P USA INC 55%

RIVER PIPELINE COMPANY

River States Oil Co. 1960 MURPHY OIL CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

63

RLP Gulf States, LLC HLP GULF STATES LLC

RME Petroleum ANADARKO E&P COMPANY, LP

RMR, Inc. 1989 TEXACO TPC, INC.

Robert M. Bass RMB O&G TX (WY)(LA)(MULTI-STATE)

Roberts & Koch - Permian RDR ENERGY, LLC

Roberts & Koch - Permian & SE New Mexico FOREST OIL PERMIAN CORP.

Roberts Petroleum 1963 CRYSTAL OIL CO.

Rock Hill Oil Co. 1955 CHEVRON

Rock Island Refining Corporation 1989 MARATHON OIL COMPANY

Rock Island Oil and Refining CO, Inc. KOCH EXPLORATION COMPANY, LLC

ROCKET OIL & GAS COMPANY LP managed by AVIVA

Rockhill HOMA OIL & GAS CO.

Rocky Mountain Energy ANADARKO E&P COMPANY, LP

Rocky Mountain Ventures, Inc. 1973 G/O INTERNATIONAL, INC.

Roden Oil Co. 1972 EOG RESOURCES, INC.

RODMAN-NOEL OIL CORP.

ROLAND LIBERDA

Root Petroleum Corp. 1947 BP AMERICA

Rosario Resources ANADARKO E&P COMPANY, LP

ROSCOE GAS & OIL CO.

ROSEWOOD RESOURCES INC.

Rosser & Pendleton M.R. YOUNG

Rowan Oil SUNOCO PARTNERS MKTG & TERMI-

Roxana Petroleum Corp. 1928 Shell Oil Co.

Roxoil Drilling, Inc. 1946 DEVON ENERGY

Royal Petroleum Corp. 1974 KERR-MCGEE CORP.

Royalty Ventures Corp. 1985 APACHE CORP.

Roytex Oil Co. 1950 DEVON ENERGY

RRC OPERATING CO.

RDT Properties, Inc. MID-CON ENERGY OPERATING, INC.

Rusk County Transporting Systems Inc. GLOBAL NATURAL RESOURCES CORP.

RVO Petroleum Co. 1981 CHEVRON

Rycade Oil Co. ASHLAND OIL CO.

Rycade Oil Corp. Shell Oil Co.

S.A.M. Royalty CHESAPEAKE ORC, LLC

S.J.F. Corp. 1984 DEVON ENERGY

S.W. Blount BOUNTY PRODUCTION CO.

Sabine Corp. PACIFIC ENERPRISES OIL CO. (USA)

Sabine Exploration Corp. FREEPORT-MCMORAN ENERGY PTNRS

Sabine Production Co. PACIFIC ENTERPRISES OIL CO. (USA)

Sabine Royalty Corp. 1977 PACIFIC ENTERPRISES OIL CO. (USA)

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

64

Sack Properties, Inc. (Assets) IMPERIAL OIL COMPANY OF CALIFOR-

SAGE ENERGY CO.

Salt Done Production Co. 1956 MARATHON OIL COMPANY

Saltmount Oil Co. 1951 BP AMERICA

Salton Riviere Inc. 1976 EOG RESOURCES, INC.

Sam Wilson see Tenneco Inc

Samedan Oil Corp. NOBLE ENERGY, INC.

Samoset Petroleum Co. 1915 Shell Oil Co.

SAMSON RESOURCES

Samson Redbud, LLC SAMSON LONE STAR, LLC

San Jacinto Petroleum Corp. 1958 CONOCOPHILLIPS

San Jacinto EXXON MOBIL CORP.

San Juan Basin Trust CONOCOPHILLIPS

San Juan Oil Co. 1952 CONOCOPHILLIPS

San Salvador Dev. Co., Inc. BLACKSTONE MINERALS CORP.

Sand Springs Oil and Gas TOKLAN OIL AND GAS CORP.

SANDRIDGE ENERGY, INC

Sandy Ridge Oil Co., Inc. 1983 VAN FOSSAN OIL ASSOCIATES

Sanguine, Ltd. DOMINION EXPLORATION MIDCONTI-

Sanguine, Ltd. SANGUINE GAS EXPLORATION, LLC

Santa Fe Energy Co. 1989 DEVON ENERGY

Santa Fe Energy Operating Partners, L.P. DEVON ENERGY

Sante Fe Energy Resources, Inc. DEVON ENERGY

SANTA FE MINERALS, INC.

Santa Fe Snyder Corp. DEVON ENERGY

Santa Fe-Andover Oil Co. 1989 SANTA FE MINERALS, INC.

Santiago Oil & Gas Co. JOHN P. MACNAUGHTON

Santo Resources Inc. CHESAPEAKE EXPLORATION LLC

SAP Acquisition LLC CHESAPEAKE EXPLORATION LLC

Saturn Gas Systems FARMERS OIL COMPANY

Saxon Oil Co. 1989 CHEVRON

Saxon Oil Development Partners L.P. 1989 CHEVRON

Saxon Operating Co. 1989 CHEVRON

Saxon Operating Partnership L.P. 1989 HEP OPERATING PARTNERS, L.P.

Saxony Corporation CONOCOPHILLIPS

Saxony Industries, Inc. 1984 NORMANY OIL & GAS CO.

Schermerhorn Oil. Corp. CONOCOPHILLIPS

Scott Oil & Gas Operations CMS ENERGY, INC.

Scurlock Oil Co. ASHLAND OIL CO.

Scurlock Permian Corp. ASHLAND OIL CO.

Scurlock Permian Corp. PLAINS MARKETING, LP

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

65

Seaboard Oil Co. 1958 CHEVRON

Seagull Energy Corp. DEVON ENERGY

Seagull Energy Inc. DEVON ENERGY

Seagull Mid-South Inc. DEVON ENERGY

Seahawk Gathering GOLIAD OPERATING COMPANY

SEAHAWK OIL INTERNATIONAL, INC.

Search Drilling. Co. 1989 Plains E & )

Search Energy Corp. ADVANTAGE OIL & GAS LTD.

Search Exploration Inc. HARKEN ENERGY CORP.

Seaside Oil Co. CONOCOPHILLIPS

Seaxe Energy Corp. 1987 APACHE CORP.

Sedna Energy Company FOUNDATION ENERGY MANAGEMENT

Sempra Energy Production Company PEC MINERALS, LP

Sempra Oil & Gas, Inc. PEC MINERALS, LP

Seneca Oil Co. 1989 KAISER-FRANCIS OIL CO.

SENECA RESOURCES CORPORATION

Sensor Oil & Gas Co LENORMAN ENERGY CORP.

Sentinel Resources Corp. 1987 RED EAGLE RESOURCES CORP.

Sesquicentennial Land Co. 1987 BALBOA EXPLORATION CO.

SEW Oil Corp. FINA OIL & CHEMICAL CO.

SGO Petroleum Inc. DEVON ENERGY PROD. CO, LP

Shaffer Oil & Refining Co. 1958 CRESCENT OIL & GAS CORP.

SHALETT OIL & GAS CO.

Shalett Oil Co. 1961 MARINE PROPERTIES, INC.

Shallow Oil Company J.C. TRAHAN DRILLING CONTRACTOR,

Shamrock Oil & Gas Corp. 1967 MAXUS ENERGY CORP.

Shana Petroleum Company NEG OPERATING LLC

Shell Co. of California Shell Oil Co.

Shell Oil Co. SHELL WESTERN E&P INC.

Shell Oil Co. 1988 (US Onshore Properties) THE MERIDIAN RESOURCES CORPORA-

Shell Petroleum Co. 1938 Shell Oil Co.

SHELL TRADING (U.S.) CO

Shell Union Oil Corp. 1949 Shell Oil Co.

SHELL WESTERN E&P INC. SWEPI, INC

Shenandoah Oil Company GLOBAL NATURAL RESOURCES CORP.

Shenandoah Oil Corp. 1980 CONOCOPHILLIPS

Shenandoah Oil Corp. 1980 * GALAXY OIL CO.

Sheridan Energy, Inc. CALPINE NATURAL GAS, LP

Shield Energy, Inc. JOHN P. SHIELDS, INC.

Shield Oil Co. NUMAC RESOURCES

Shield Oil Corp. 1981 DI INDUSTRIES INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

66

Shorline FOREST OIL PERMIAN CORP.

Sid R. Bass, Inc. SRBI O&G TX (WY)(LA)(MULTI-STATE)

Sid R. Bass, Trustee (Sid R. Bass Mgmt. SRBMT O&G TX (WY)(LA)(MULTI-STATE)

Sid Richardson Carbon & Gasoline Company SOUTHERN UNION GAS SERVICES

Siebens Oil & Gas CHEVRON

Sierra Exploration Co. 1985 WICHITA RIVER OIL CO.

Sigmore 1983 MAXUS ENERGY CORP.

Signal Oil & Gas Co. CONOCOPHILLIPS

Signal Oil Co. 1912 Shell Oil Co.

Siler Energy Investments, Inc. 1981 STRIKER PETROLEUM CORP.

Simpson Investments, Inc. DABB ENERGY CO.

Sinclair Consolidated Oil Corp. BP AMERICA

Sinclair Gulf Corp. BP AMERICA

Sinclair Oil Corp. 1969 BP AMERICA

Sinclair Oil Refining BP AMERICA

Sinco Oil Corp. 1982 STARK ENERGY INC.

Sioux Oil Co. 1968 TESORO PETROLEUM CORP.

Skelly Oil Co. 1977 CHEVRON

SKZ Inc. 1986 ZILKHA ENERGY CO.

SLAPCO EXXON MOBIL CORP.

Slawson Enterprises SLAWSON EXPLORATION CO., INC.

SLAWSON EXPLORATION CO., INC.

Slawson Petroleum Corporation ALAMEDA ENERGY, INC.

Slick Oil Co. see Tenneco Inc

Slick Oil Company ASHLAND OIL INC.

Smith & McGrath BENGAL OIL & GAS

Smith & McGrath PRIMARY FUELS, INC.

Snowden & McSweeney Co. 1944 BP AMERICA

Snyder Oil Corporation DEVON

SNYDER OIL PARTNERS DEVON

Socal 1984 CHEVRON

SOCO Wattenberg Corporation NOBLE ENERGY, INC.

Socony-Mobil Oil Co. 1966 EXXON MOBIL CORP.

Socony-Vacuum Oil Co. 1955 EXXON MOBIL CORP.

Sohio Petroleum Co. BP EXPLORATION INC.

Solar Refining Co. 1931 BP EXPLORATION INC.

Sonat Exploration Co EL PASO E&P COMPANY, LP

Sonora Acquisition Corp. see Dominion Exploration & Production

Sooner Energy Corp. TATONKA ENERGY INC1

Sotex 1961 CHEVRON

Sourgasco, Inc. see Dominion Exploration & Production

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

67

South Fork Oil & Gas Co. TEJAS OIL & GAS CO

South Louisiana Production Co. EXXON MOBIL CORP.

South Penn Oil Co. DEVON ENERGY

South States Development Company see Dominion Exploration & Production

South States Oil & Gas Co. 1983 see Dominion Exploration & Production

South Timbers Oil LP XTO ENERGY INC.

Southeastern Exploration Corp. EOG RESOURCES, INC.

Southern Community Gas Co. VENUS OIL CO.

Southern Crude Oil Purchasing Co. 1931 BP AMERICA

Southern Mineral Corporation UNIT CORP.

Southern Minerals Co. 1970 SUNOCO PARTNERS MKTG & TERMI-

Southern Natural Gas EL PASO E&P COMPANY, LP

Southern Petroleum Exploration, Inc. THE WISER OIL CO.

Southern Production 1950 BP AMERICA

Southern Union Production Co. see Supron Energy Corp.

Southland Gathering Company CONOCOPHILLIPS

Southland Pipeline Company CONOCOPHILLIPS

Southland Royalty Co. 1985 CONOCOPHILLIPS

Southport Exploration, Inc. NEWFIELD EXPL MID-CONTINENT INC.

Southport Exploration, Inc. AVIVA AMERICA INC. (50%)

Southport Petroleum Co. of Delaware 1945 TOTAL E&P USA INC

Southwest Forrest Gas Gathering Co. ANADARKO E&P COMPANY, LP

Southwest Gas Supply SUNDOWN ENERGY INC.

Southwest Land Development Company FINAL OIL AND CHEMICAL COMPANY

Southwest Petroleum Corporation SYLVAN RESOURCES, LLC

Southwest Petrocorp, Inc SYLVAN RESOURCES, LLC

Southwestern Energy Production Company SWN PRODUCTION COMPANY, LLC

Southwestern Oil & Refining Co. 1974 KERR-MCGEE CORP.

SOUTHWESTERN PRODUCTION CORP.

Sovereign Exploration Co. BONANZA PETROLEUM, INC.

Sparkman Energy Corp. 1985 ESKEY INC.

Sparkman Producing Co. 1985 PLAINS EXPLORATION & PRODUCTION

Spectrum 7 Energy Corp 1980-83 Drlg Prgs CABOT OIL & GAS CORP.

SPG Exploration Corp. 1988 ANADARKO E&P COMPANY, LP

Spinnaker Exploration Co., LLC HYDRO GULF OF MEXICO, LLC

Spinnaker Royalty Co., LP Dorchester Minerals LP

Spring Resources, Inc. XTO ENERGY INC.

Spur Oil Co. 1960 MURPHY OIL CORP.

SRC Production CONOCOPHILLIPS

SRC Realty Company CONOCOPHILLIPS

St. Joe Petroleum PRIMARY FUELS, INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

68

St. Mary Land Exploration Co. SM ENERGY COMPANY

St. Mary Operating Company ST. MARY LAND & EXPLORATION, INC.

Stallion Energy, Inc. PLAINS EXPLORATION & PRODUCTION

Stallion Panhandle 2001, LP PLAINS EXPLORATION & PRODUCTION

Stallion Production Corp. PLAINS EXPLORATION & PRODUCTION

Standard Gas Co./Standard Gasoline Co. CHEVRON U.S.A. INC.

Standard Oil & Gas Co. of Oklahoma 1912 Shell Oil Co.

Standard Oil Co. of California 1984 CHEVRON

Standard Oil Co. of Indiana 1985 BP AMERICA

Standard Oil Co. of Kansas 1948 BP AMERICA

Standard Oil Co. of Kentucky 1961 CHEVRON

Standard Oil Co. of Louisiana EXXON MOBIL CORP.

Standard Oil Co. of Nebraska 1939 BP AMERICA

Standard Oil Co. of New Jersey 1972 EXXON MOBIL CORP.

Standard Oil Co. of New York 1931 EXXON MOBIL CORP.

Standard Oil Co. of Ohio 1985 DALEN RESOURCES OIL & GAS CO.

Standard Oil Co. of Texas 1961 CHEVRON

Standard Oil Production Co. 1989 DALEN RESOURCES OIL & GAS CO.

Stanolind Oil & Gas Co. 1981 BP AMERICA

Star Oil & Gas Corp. 1980 TWO FOUR SIX EXPLORATION INC.

STARK ENERGY INC.

Starr Holdings Partnership KERRCO INC.

Statoil Oil & Gas LP EQUINOR ENERGY PL

Statoil Texas Onshore Properties LLC EQUINOR TEXAS ONSHORE PROPER-

Statoil USA Onshore Properties Inc. EQUINOR USA ONSHORE PROPERTIES

State Exploration STATEX PETROLEUM INC.

States Exploration 1985 WEPCO ENERGY CO.

STATEX PETROLEUM INC.

Steaua Romana (U.S.) Inc. 1987 AMBRIT ENERGY CORP.

Stephens Petroleum F.E. HARPER

Sterling Oil Co. 1950 see Tenneco Inc

Stetco Petroleum Co. DEVON ENERGY

Stevens Oil & Gas ANADARKO PETROLEUM CORPORA-

STJ LP mangaed by AVIVA

Stoltz Wagner & Brown 1984 WAGNER & BROWN, LTD.

Stone & Webster Oil Co, Inc. UNIT CORP.

STONE ENERGY CORPORATION

Stone Petroleum Co. 1983 FREEPORT-MCMORAN INC.

Stove Creek Done Oil & Rfng. Co. 1955 BIG PINEY OIL & GAS CO.

Strata Crop. 1986 RANGE RESOURCES CO. PETROLEUM

Strata Energy, Inc. 1983 NATURAL RESOURCES MGMT CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

69

STRIKER PETROLEUM CORP.

Stroud Energy RANGE TEXAS PRODUCTION, LLC

Subsurface, Inc. CHESAPEAKE KNAN ACQUISITION, LLC

Suburban Propane Gas Corp. 1983 ANADARKO E&P COMPANY, LP

Sumac Petroleum 1962 CHEVRON

Summit Energy Inc. 1988 CASPEN OIL, INC.

Sun Exploration & Production 1989 KERR-MCGEE OIL & GAS ONSHORE,

Sun Refining and Marketing Co. SUNOCO PARTNERS MKGT & TERMI-

Sunburst Exploration 1993 CHEVRON

Sunburst Oil Co. 1922 MARATHON PETROLEUM CO.

Sundance Energy Corp. TEXAS MERIDIAN RES. LTD.

SUNDOWN ENERGY INC.

Sunmark Exploration Co. KERR-MCGEE OIL & GAS ONSHORE,

Sunningdale Oils. Ltd. KERR-MCGEE CORP.

Sunny South Oil & Gas Inc. 1985 KELLEY OIL CORP.

Sunnybrook Oil & Gas Inc. PLAINS RESOURCES, INC.

SUNOCO PARTNERS MKT. & TERMINALS

Sunray Oil Co. 1955 KERR-MCGEE OIL & GAS ONSHORE,

Sunray-DX Oil Co. 1968 KERR-MCGEE OIL & GAS ONSHORE,

Sunray-Mid Continent Oil Co. 1962 KERR-MCGEE OIL & GAS ONSHORE,

Sunrise Oilfield Supply Company MERIDIAN PIPE & EQUIPMENT CO., INC.

Sunrise Petroleum Inc. 1981 ORS CORP.

Sunset International Petroleum CHEVRON

Sunset Oil Co. HESS CORPORATION

Superior Of Oklahoma 1943 SUNOCO PARTNERS MKTG & TERMI-

Superior Oil Co. 1984 EXXON MOBIL CORP.

Supply Development Group SUNDOWN ENERGY INC.

Supron Energy Corp. 1982 CONOCOPHILLIPS

Suran Royalty CHESAPEAKE ORC, LLC

Surrey Oil & Gas Corp. 1960 MARATHON OIL COMPANY

Swiss Oil Corp. 1936 ASHLAND OIL INC.

Sun Operating LTD Partnership KERR-MCGEE OIL & GAS ONSHORE,

Sydson D'Oro Expl. Co. Inc. TEXAS MERIDIAN RES. LTD.

T & L Oil 1961 CHEVRON

Tal Vez Oil Co. 1983 LINGEN OIL & GAS INC.

Talisman Energy USA Inc REPSOL USA

Tana Production Corp. 1989 TEXACO TPC, INC.

Tanos Energy, LLC MEMORIAL PRODUCTION PARTNERS

Targa Oil & Gas, Inc. 1983 CHAPMAN ENERGY INC.

Target Oil & Gas, Inc. 1984 EGRET ENERGY CORP.

Taurus Exploration Inc. ENERGEN RESOURCES CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

70

Taurus Exploration USA ENERGEN RESOURCES CORP.

TAURUS PETROLEUM INC.

Taylor Oil & Gas Co 1955 see Tenneco Inc

TCM, LLC PETROHAWK PROPERTIES, LP

TDT Diverse L.P. FORTUNE NATURAL RESOURCES COR-

TE Products Pipeline Company, LLC ENTERPRISE TE PRODUCTS PIPELINE

TEAI Oil & Gas Co. PETROHAWK PROPERTIES, LP

Teal Petroleum Co. SAMSON PROD SERVICES COMPANY

Tectonic Energy Cor. 1984 ENERTEC CORP.

Ted Weiner TEXAS CRUDE INC.

Tee Oil, Inc. 1988* PRESIDIO OIL CO.

Tee Operating Co. CHAPMAN RESOURCES

TEJAS GAS CO.

Tejas Production Co. 1980 WAINOCO OIL CORP.

Tejax Energy 1987 HEADINGTON INVESTMENTS, INC.

Tekoil Corp. 1962 CONSOLIDATED OIL & GAS, INC.

Tema Oil Co. PIONEER NATURAL RESOURCES USA,

Temex Energy, Inc. CALPINE NATURAL GAS, LP

Templeton Energy, Inc 1987 TGX CORP.

TENKAY RESOURCES INC.

Tenneco Gas Prod. Co. RANGE ENERGY VENTURE CORP

Tenneco LaTerre, Inc. 1988 TOTAL E&P USA INC

Tenneco Ventures Corp. RANGE ENERGY VENTURE CORP

Tenneco Ventures Finance Corp RANGE ENERGY FINANCE CORP

Tenneco, Inc. / Tenneco Oil Company see TOC -

Tennessee Glacier Park Co. CONOCOPHILLIPS

TEPPCO Crude Oil LP ENTERPRISE CRUDE OIL LLC

TEPPCO Colorado, LLC ENTERPRISE COLORADO LLC

TEPPCO Crude GP, LLC ENTERPRISE CRUDE GP LLC

TEPPCO Crude Oil, LLC ENTERPRISE CRUDE OIL LLC

TEPPCO Crude Pileline, LLC ENTERPRISE CRUDE PIPELINE LLC

TEPPCO Investments, LLC ENTERPRISE TE INVESTMENTS LLC

TEPPCO Midstream Companies, LLC ENTERPRISE MIDSTREAM COMPANIES

TEPPCO NGL Pipelines, LLC ENTERPRISE NGL PIPELINES II LLC

TEPPCO Partners, L.P. ENTERPRISE TE PARTNERS L.P.

TEPPCO Seaway, L.P. ENTERPRISE SEAWAY L.P.

TEPPCO Terminialing and Marketing Compa- ENTERPRISE REFINED PRODUCTS

TEPPCO Terminals Company L.P. ENTERPRISE REFINED PRODUCTS

Terra Resources, Inc. 1981* OXOCO INC.

TERRAPET ENERGY CORP.

TES Acquisition Corp. see Dominion Exploration & Production

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

71

TESORO PETROLEUM CORP.

TEX/CON OIL & GAS CO.

TEXACO TPC INC. CHEVRON

Texaco, Inc. CHEVRON

TEXAS AMERICAN OIL CORP.

Texas Commerce Bank JP MORGAN CHASE

Texas Crude Inc WESTERLY EXPLORATION, INC.

Texas Eagle Oil Co. 1984 RANGE PRODUCTION CO. MINERALS,

Texas Eastern Exploration 1986* NOBLE ENERGY, INC. OIL CORP.

Texas Eastern Products Pipeline Company, ENTERPRISE PRODUCTS PIPELINE

Texas Energy Supply, Inc. DURANGO PRODUCTION CORP.

Texas Fuel Co. 1902 CHEVRON

Texas Gas Exploration Corp. 1986 ENERGEN RESOURCES CORP.

Texas Gas Producing Co. HESS CORPORATION

Texas Gulf Production 1963 BP AMERICA

Texas International Oil Co., Ltd. GLOBAL NATURAL RESOURCES CORP.

Texas International Petroleum Co. 1987 ENERGEN RESOURCES CORP.

Texas Meridian Operating Co. Ltd. THE MERIDIAN RESOURCES CORPORA-

Texas Meridian Prod. Co. Ltd THE MERIDIAN RESOURCES CORPORA-

TEXAS MERIDIAN RESOURCES LTD.

Texas National Petroleum Corp. 1962 CHEVRON CORP.

Texas Northeast Oil & Gas Co. MOORE MCCORMACK ENERGY, INC.

Texas Oil & Gas Corp. MARATHON OIL COMPANY

Texas Pacific Oil & Gas ANADARKO PETROLEUM CORPORA-

Texas Pacific Coal & Oil Co ANADARKO PETROLEUM CORPORA-

Texas Pacific Oil Co. 1979 SUNOCO PARTNERS MKTG & TERMI-

Texas Royalty Company (Assets) IMPERIAL OIL COMPANY

Texas Southwest Resources Corp. KAISER-FRANCIS OIL CO.

Texasgulf, Inc. 1981 ELF-AQUITAINE, INC.

Texcan Resources Corp. 1982 CONOCOPHILLIPS

Texco Energy Corp. EGRET ENERGY CORP.

Texcon DALEN RESOURCES OIL & GAS CO.

Texhoma Oil & Refining Co. 1928 CONOCOPHILLIPS

Texoma Production Co. 1985 MCN EXPLORATION

Texoma Production Co. 1986 APACHE CORP.

TEXON ENERGY CORP.

Texon Oil & Land Co. CONOCOPHILLIPS

Texota Oil Co. 1968 NORTH AMERICAN RESOURCES CORP.

Tex-Star Oil & Gas Corp. 1964 MARATHON OIL COMPANY

TGX Corp. CALPINE NATURAL GAS, LP

The Bodrain Company (Merger) IMPERIAL OIL COMPANY

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

72

Thomas C Mueller, Inc. Ltd & of Crawford XTO ENERGY INC.

Three States Natural Gas Co. 1961 see Tenneco Inc

Three Rivers Acquisition LLC COG OPERATING LLC

Three Rivers Operating Company LLC COG OPERATING LLC

Thru Line, Inc. THRU LINE O&G TX (WY)(LA)(MULTI -

Tide Water Associated Oil Co. CHEVRON

Tidewater Oil Co. 1967 CHEVRON

TIPCO see TEXAS INTERNATIONAL PETROLE-

TIPPERARY OIL & GAS CORPORATION

Titan Resources I, Inc. CHEVRON MIDCONTINENT, LP

Titan Resources CHEVRON CORP.

Titan Resources, LP CHEVRON MIDCONTINENT, LP

TOC - Gulf Coast Onshore TOTAL E&P USA INC

TOC - California BP AMERICA

TOC - Gulf of Mexico Federal Offshore CHEVRON

TOC - Houston Oil & Minerals DEVON ENERGY

TOC - Mid-Continent PIONEER NATURAL RESOURCES USA,

TOC - Norway CONOCOPHILLIPS

TOC - Rocky Mountains BP AMERICA

TOC Acquisitions Corp. see Dominion Exploration & Production

TOKLAN OIL & GAS CORPORATION

Toklan Oil Cor. 1957 see Dominion Exploration & Production

Toltec Oil & Gas Inc. 1983 CHAPMAN ENERGY INC.

Tom Brown, Inc. ENCANA OIL & GAS USA, INC.

Tom Brown, Inc. (NM Properties) MANGUM HUNTER

Tonka Oil & Gas Ltd. 1974 PACIFIC ENTERPRISES OIL CO. (USA)

TORCH ENERGY ASSOCIATES

TORCH OIL & GAS CO.

Tosco Corporation 1985 LION OIL TRADING & TRANSPORTA-

Tosco-Lion, Inc. 1978 LION OIL TRADING & TRANSPORTA-

TOTAL E&P USA INC

Total Minatome Corp. ENERGEN RESOURCES

Total Petro Inc 1987, Rocky Mtn Prop Only ENERGEN RESOURCES CORP.

Total Petroleum (North America) Ltd. ULTRAMAR DIAMOND SHAMROCK

TotalFina TOTAL E&P USA INC

Towner Petroleum, 1986 ZILKHA ENERGY CO.

Trafalgar House Oil & Gas, Inc., 1989 HARDY OIL & GAS USA INC.

TRANS ATLANTIC RESOURCES CORP.

TRANSAMERICAN NATURAL GAS CORP.

Transco Expl Ptnrs Ltd (Offshore) 1988 * ENERGY DEVELOPMENT CORP.

Transco Expl Ptnrs Ltd (Onshore) 1988 * see Dominion Exploration & Production

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

73

Transco Exploration & Production WILLIAMS EXPLORATION CO.

Transco Exploration Co. FOREST OIL CORPORATION

TRANSCONTINENTAL OIL CO.

Transcontinental Oil Co. 1930* MARATHON PETROLEUM CO.

Transcontinental Production Co. FOREST OIL CORPORATION

Transierra Exploration Corp. BELCOR, INC.

Transmountain Production Co. 1974 TOTAL E&P USA INC

TransOcean Oil Co. 1980 EXXON MOBIL CORP.

Transwestern Oil Co. 1946 SUN CO, INC (R&M)

Tranwestern Royalty Corp. 1949 DEVON ENERGY

Transworld Oil USA, Inc. TRANSWORLD E&P, INC.

Traver Oil Co. LAVINO OIL & GAS CO.

Traverse Oil Co. 1985 FEDERATED NATURAL RES. CORP.

Trebol Drilling Company CONOCOPHILLIPS

Trebol Oil RODMAN-NOEL OIL CORP.

Tredegar Oil & Gas Corp. WAINOCO OIL CORP.

Tredegar Petroleum Corp. WAINOCO OIL CORP.

Tredegar Properties, Inc. WAINOCO OIL CORP.

Trend Drilling Co. NABORS DRILLING USA, LP

Triangle USA Petroeum Corp. NINE POINT ENERGY LLC

Tribal Oil Co. 1974 BUTTES OIL & GAS CO.

Tribune Oil Cor. 1983 PACIFIC ENTERPRISES OIL CO. (USA)

Trice Production Co. HESS CORPORATION

Tricentrol Resources, Inc. 1984 BASF CORP/WINTERSHALL ENERGY

Tricentrol U.S., Inc. 1988 BP AMERICA

Trident NGL Inc. NATURAL GAS CLEARINGHOUSE

Trigood Oil Co. ANADARKO E&P COMPANY, LP

Trinidad Oil 1956 CHEVRON

Trinity Oil & Gas Co. QUESTA OIL & GAS CO.

TRINITY RESOURCES, INC.

Tri-Power Petroleum Inc. 1986 PLAINS PETROLEUM CO.

Triton Energy LTD HESS CORPORATION

TRITON MINERALS & ROYALTY, INC.

TRITON OIL & GAS CORP.

Triton Producing Co. HESS CORPORATION

Triumph Resources, LLC 2002 CHAPARRAL ENERGY, INC.

True's Oil Co. 1959 BP AMERICA

Trunkline 1967 ANADARKO PETROLEUM CORPORA-

TRUST PIPE LINE CO.

Turner Oil Co. 1915 Shell Oil Co.

Twin Oil BP AMERICA

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

74

TWO FOUR SIX EXPLORATION INC.

TXL Oil Corp. 1962 CHEVRON

TXO Production Co. 1991 MARATHON OIL COMPANY

TXOK ENERGY RESOURCES CO.

U.S. Exploration Co. 1989 THE MERIDIAN RESOURCES CORPORA-

U.S. Exploration Holdings, Inc. NOBLE ENERGY, INC.

U.S. MINERALS EXPLORATION CO.

U.S. RESOURCES INC.

U.S. Royalties Corp. IMPERIAL OIL COMPANY

UGI Corp. 1985 see Dominion Exploration & Production

ULTRAMAR DIAMOND SHAMROCK CORP.

UMC Pet. Res. Cor. 1989 UMC PETROLEUM CORP.

UMC PETROLEUM CORP.

UNIMAR CORP. (UNION TEXAS/

Union Carbide Petroleum Corp. 1971 ASHLAND OIL, INC.

Union Connection, Inc. ORBIT PETROLEUM, INC.

Union Exploration Partners, Ltd. CHEVRON CORP.

Union Gas & Oil Co. (Kentucky ) 1925 ASHLAND OIL, INC.

Union Oil & Gas Corp. of Louisiana CONOCOPHILLIPS

Union Oil Co. of California 1985 CHEVRON CORP.

Union Pacific Resources Company ANADARKO E&P COMPANY, LP

Union Petroleum Co. 1920 BP AMERICA

Union Producing Co. DEVON ENERGY

Union Sulphur WESTERN

Union Texas Natural Gas 1962 BP AMERICA

Union Texas Petroleum Corp. BP AMERICA

Unit Carbon Co. ASHLAND OIL, INC.

Unit Drilling & Exploration Co. 1985 UNIT CORP.

United Central Oil Co. 1925 CROWN CENTRAL PETROLEUM CORP.

United Oil Co. 1916 CONOCOPHILLIPS

United Oil Co. 1926 BP AMERICA

United Oil Cor. 1988 CREDO PETROLEUM CORP.

United Producing Co. ASHLAND

United Refining Co. 1976 DEVON ENERGY

United States Exploration, Inc. NOBLE ENERGY, INC.

Universal Consolidated Oil Co. 1961 CHEVRON

Universal Energy Corp. 1986 ORS CORP.

Universal Explorations Ltd 1989 CONQUEST EXPLORATION CO.

Universal Resources Corp. QUESTAR EXPLORATION AND PRO-

Universal Resources Corp. 1986 QUESTAR CORP.

Unocal Corp. CHEVRON CORP.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

75

Unocal Exploration Corp. CHEVRON CORP.

Upland Resources, Inc. GRANITE OPERATING CO.

Usenco, Inc. 1988 PLAINS EXPLORATION & PRODUCTION

USX Corp. (formerly U.S. Steel) 1983 MARATHON OIL COMPANY

Utah Oil BP AMERICA

V.M. Harrison OCCIDENTAL OIL & GAS CORPORATION

Vacuum Oil Co. 1931 EXXON MOBIL CORP.

VADIS INVESTMENTS, INC.

Valero Producing Co. 1987 WACKER OIL INC.

VALTEX PETROLUEM, INC.

Valley Fina Oil Company 1979 TOTAL E&P USA INC

VAN DYKE ENERGY CO.

Van Dyke Oil Co. VAN DYKE ENERGY CO.

VAN FOSSAN OIL ASSOCIATES

Vanderbilt Energy 1985 DEVON ENERGY

VANGUARD OIL & GAS INC.

Vanguard Petroleum Corp. VANGUARD OIL & GAS INC.

Vanguard Pipeline Corp. VANGUARD OIL & GAS INC.

Vantage Point Energy 8/92 CONVEST ENERGY CORPORATION

Vantage Point Operating Co. CONVEST ENERGY CORPORATION

VARN OIL CO.

Vastar Offshore, Inc. BP AMERICA

Vastar Resources, Inc. BP AMERICA

Veneucot Resources, Inc. DIVERSE ENERGY INVESTMENTS INC.

VENEX CORP.

Venezuela Syndicate, Inc. 1957 see Dominion Exploration & Production

VENUS OIL CO.

VICTORY ENERGY PARTNERS LLC

Viking Oil Ltd. 1980 SUN CO., INC. (R&M)

Vintage Petroleum, LLC OCCIDENTAL PETRO. CORP.

Visa Energy Corp. ENSOURCE INC.

VOLVO PETROLEUM, INC.

Voyager HOWELL PETROLEUM CO.

Voyager Petroleum TRANSCO EXPLORATION PARTNERS

Voyager Petroleum FREEPART-MCMORAN

W.A. Moncrief, Jr. MONCRIEF OIL INTERESTS

W.K. Oil Co. 1915 Shell Oil Co.

W.L. Hinds CONOCOPHILLIPS

W.B. Osborn LONGHORN OIL & GAS

W.E. Bakke ABLE & BANCROFT

W.E. Carl Oil Co. MCFARLAND ENERGY, INC.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

76

W.G. Skeeters Co. 1980 HARKEN OIL & GAS CORP.

W.H. HEISLER, JR.

W.R. Davis CONOCOPHILLIPS

Wachovia Bank, Delaware WELLS FARGO BANK, SIOUX FALLS,

Wachovia Bank, North Caroloina WELLS FARGO BANK, SIOUX FALLS,

Wachovia Bank, NA WELLS FARGO BANK NA

Wacker Oil Inc. DEVON ENERGY

Wagner & Brown WAGNER & BROWN, LTD.

Wagner & Brown II WAGNER & BROWN, LTD.

WAGNER & BROWN LTD.

Wainoco Oil Corp. FRONTIER OIL CORPORATION

Walker Energy 1985 TEXAS MERIDIAN RESOURCES LTD

Walker Energy Partners MLP 1989 TEXAS MERIDIAN RESOURCES LTD

Waller County Minerals Co. GLOBAL NATURAL RESOURCES CORP.

Walton Oil Co. 1982 OCTOBER OIL CO.

Warren Petroleum CHEVRON

Warren-Bradshaw CHEVRON

Washington Royalties Company (Merger) IMPERIAL OIL COMPANY

Washita Production Co. CHESAPEAKE ORC, LLC

Waterford Energy Inc. 2/91 KAISER-FRANCIS OIL CO.

Watson & Taylor Energy Inc 1987* KERR-MCGEE CORP.

Watson Oil Corp. 1980 UMC PETROLEUM CORP.

Waverly Oil Co., Inc. 1985 WAINOCO OIL CORP.

WCOG Properties, Ltd. PETROHAWK PROPERTIES, LP

WD Partners, LP WD O&G TX (WY)(LA)(MULTI-STATE)

Weaver Oil & Gas Corp. ANADARKO E&P COMPANY, LP

Webb Resources DALEN RESOURCES OIL & GAS CO.

Weber Oil Co. 1942 MARATHON PETROLEUM CO.

Weber Oil Co. 1957 EQUITY OIL CO.

WECO Development Corp. HESS CORPORATION

WEDCO OXFORD CONSOLIDATED, INC.

Wellington Oil Co. CHEVRON

WENTEX INTERNATIONAL, INC.

WEPCO ENERGY CO.

Westport Oil & Gas Co., Inc. KERR-MCGEE OIL & GAS ONSHORE,

West Natural Gas 1962 BP AMERICA

West Timbers Oil, LP XTO ENERGY INC.

Westates Petroleum Co. 1976 DEVON ENERGY

Westcoast Oil & Gas 1976 PRESDIO OIL CO.

WESTERN

Western Associated Development Corp. BEACON EXPLORATION CO.

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

77

Western Energy Dvlpmt. Co., Inc. 1986 OXFORD CONSOLIDATED, INC.

WESTERN GEOPHYSICAL

WESTERN NATURAL GAS CO.

Western Oil & Fuel Co. 1958 CONOCOPHILLIPS

Western Oil Fields Corp. 1928 CONOCOPHILLIPS

Western Oil Fields Inc. CASPEN OIL, INC.

Western Oil Shale Corp. 1980 MAGIC CIRCLE ENERGY CORP.

Western Pacific Petroleum, Inc. GLOBAL NATURAL RESOURCES CORP.

Western Resources Inc. WESTERN ENERGY

Western States Producing Co. ANADARKO E&P COMPANY, LP

Westheimer-Neustadt Corp. 1981 KFOC, INC.

Westhoma Oil Co. 1976 CONOCOPHILLIPS

Westland Drilling Co. GOLIAD OPERATING COMPANY

Westland Exploration Co. 1992 KAISER-FRANCIS OIL CO.

Westpan Resources LP PIONEER NATURAL RESOURCES USA,

Westport Oil & Gas Co., LP KERR-MCGEE OIL & GAS ONSHORE,

Westport Resources Corp. KERR-MCGEE

Westrans Petroleum Inc. 1976 FREEPORT-MCMORAN ENERGY PTNRS

WEXCO OF DELAWARE INC.

WG Operating Co., Inc. HALCON OPERATING CO., INC.

Whaley Co. 1962 CHEVRON

White Eagle CIMAREX ENERGY CO.

White Rock Equity LP LINN ENERGY HOLDINGS, LLC

White Rock Equity Management LLC LINN ENERGY HOLDINGS, LLC

White Rock Oil Co. GOLIAD OPERATING COMPANY

WHITE TIGER LP managed by AVIVA

White Wing Oil Co. GOLIAD OPERATING COMPANY

Whitehall Oil Co. ASHLAND OIL INC.

Whitewood Resources Inc. GREAT LAKES ENERGY PARTNERS LLC

WHITING PETROLEUM CORP.

Wichita Industries Inc. 1985 WICHITA RIVER OIL CO.

Wichita River Oil Corporation BOULDER PETROLEUM, LLC

Wicor Inc. 1985 WEXCO OF DELAWARE INC.

Wilcox LONGHORN OIL & GAS CO.

Wilcox Oil Corp. 1964 see Tenneco Inc

Williams Arkoma Gathering Company, LLC WPX ENERGY ARKOMA GATHERING,

Williams Exploration Co. WPX ENERGY

Williams Exploration Co. 1986* TOTAL E&P USA INC I (50%)

WILLIAMS PRODUCTION RMT CO. WPX ENERGY ROCKY MOUNTAIN, LLC

Wilshire Oil Co. B-L ASSOCIATES

Wilshire Oil of California CHEVRON

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

78

Winchester Energy Co. 1985 TERRAPET ENERGY CORP.

Windsor Petroleum SOUTHWESTERN PRODUCTION CORP.

Windsor Producing Co. 1981 SANTA FE MINERALS, INC.

Winter Oil Co. BP AMERICA

Wintershall Energy ELAND ENERGY, INC.

Wintershall Oil & Gas Co. 1979* TOTAL E&P USA INC

WINWELL RESOURCES, INC.

Wiser Oil Co. FORREST OIL CORPORATION

W-N Energy Corp. 11/92 KFOC, INC.

Wolfson Oil CHEVRON

Wolverine Exploration Co. UNIT CORP.

Wolverine Gas and Oil Co., Inc. HIGHMOUNT EXPL & PROD MICHIGAN

Wolverine Petroleum Corp. 1938 Shell Oil Co.

Wolverine Reserves, LLC HIGHMOUNT EXPLORATION & PRODUC-

Woodbine Production Corp. 1984 ILEX OIL CORP.

Woodley Petroleum Co. 1959 CHEVRON CORP.

Woodward Group, Inc. HIGHMOUNT EXPLORATION & PRODUC-

Wood Oil Company PANHANDLE OIL AND GAS, INC.

Wood River Oil & Refining Company KOCH EXPLORATION COMPANY, LLC

Worland Associates 1998 CONTINENTAL RESOURCES

Worldwide Energy Corp. 1985 HESS CORPORATION

Worldwide One, Inc. HESS CORPORATION

Worldwide Petroleum Corp. 1968 CONSOLIDATED OIL & GAS, INC.

Wymore Oil Co. EL PASO E&P COMPANY, LP

Wynn-Crosby 1994 through 2000 (inclusive) PETROHAWK PROPERTIES, LP

Xeno, Inc. ENCANA ENERGY

XTO Energy Inc.

Yamac Production Co. NEUMIN PRODUCTION CO.

Yankee Cos. ACCESS ENERGY CORP

Yankee Oil & Gas 1985 ACCESS ENERGY CORP

Yates Exploration Co. 1981 OXOCO INC.

Yellowstone Oil Co. DON FRANTZEN

York & Harper 1954 see Tenneco Inc

Yount-Lee Oil Co. 1935 BP AMERICA

YPI Petroleum Inc. 1981 CASPEN OIL, INC.

Zapata Petroleum DEVON ENERGY

Zevex Corporation LL&B COMPANIES

ZG ENERGY CORP.

ZIA Energy, Inc. PLANTATION PETROLEUM ACQUISI-

ZIA Gathering, Inc. CONOCOPHILLIPS

Zilkha Energy Company EL PASO E&P COMPANY, LP

Lower Case—Past Contact UPPER CASE—CURRENT CONTACT

79

ZIM Energy Corp. 1987 MUSTANG RESOURCES CORP.

Zinke & Trumbo, Inc. ZENERGY, INC