le Reply Refer To: RP-?-!

Huffco Petroleun Corporation Attention: Nr. Donald B. Holt Pott Office Box 4436 Houston. Texas 77210

Gentlemen:

Reference 1s cede tc your Supplemental Plan of Exploration received January 30. 1986. for Lease OCS-G 4436. Block 234. South Harsh Island Area. This plan includes the activit ies proposed for Wells C. 0. end E.

In accordance with 30 CFR 250.34. revised December 13. 1979. and our letter dated January 29. 1979. this plan has oeen determined to be complete as of February 6. 1986. eed Is now being considered for approval.

Tour plan control number S-1791 am should be referenced In year communication and correst onco conceming this plan.

rinccre1y yours.

(Orig. Sgd.) A. Donald Giroir

Acting Regional Supervisor Rules and Production

bcc: ,Letse OCS-G 4436 (OPS-3-2) (FILE ROOM) ( 0PS-2-4_*/Eublic, Info. Copy of the plan (Pull.REC.)

MJTo1bert:gcw:2/?/86 Disk la

T'^ram Btrvlcfc

Information Servicei

HUFFCO PETROLEUM CORPORATION W W HAMA

PO BOX 4438 HOUSTON, TEXAS 77210

January 14, 1 r 6 T t l l « ? « • » »

• * W « S t»*«ACEME«T U.S. Oepartment o f the I n t e r i o r Minerals Management Serv ice P.O. Box 7944 Me ta i r i e , Louis iana 70002

J M 3 0 1986

Attention: Regional Supervisor Rules and Production

CMC*

RE: OCS-G 4436, Block 234 South Marsh Is land Area Supplemental Plan of Exp lo ra t ion

Gentlemen:

In accordance with 30 CFR 250.34, as amended, Huffco Petroleum Corporation herein respectfully submits for your approval, a Supplemental Plan of Exploration for lease OCS-G 4436, Block 234, South Marsh island Area, Offshore, Louisiana.

Huffco Petroleum corporation submits ten (10) copies nf T. ie proposed Supplemental Plan of Exploration. Six (6) copies are considered Proprietary Information and are exempt from disclosure as allowed for in subsection (b) paragraph (9) of the Freedom of Information Act (81 Stat. 54; U.S.C. 552) as amended by Public Law 93-502, November 21, 1974, (88 Stat. 1561). Four copies are considered "Public Information". The information believed to be exempt is geological and/or geophysical. As Operator of this lease, Huffco Petroleum Corporation requests that this information and data considered to be exempt be dispensed for use only by the U.S. Government.

Thank you for your consideration in this matter. I f further information is required, please contact the undersigned at your earliest convenience.

Operations Manager

DBH/JAC/kg

Enclosures ll Public

HUFFCO PETROLEUM CORPORATION

PLAN OF EXPLORATION

OCS-G 4436

SOUTH MARSH ISLAND AREA BLOCK 234

SECTION ITEM

1 Introductory Letter

2 Proposed T e and Sequence of Explorat Ac t i v i t ies and Timetable

3 Description of D r i l l i ng Vessel

4 Safety and Environmental Safeguards, Including Oi l Sp i l l Contingency Plan

5 Approximate Location of P r o s e d Wells and Plat

6 Structural Interpretat ion and

Shallow Dr i l l i ng Hazards Report

7 Onshore Support Base Fac i l i t i es

8 Muu Components

9 A i r Quality Report

PLAN OF EXPLORATION

OCS-G 4436

PROPOSED TYPE AND SEQUENCE OF EXPLORATION ACTIVITIES AND TIMETABLE

Section 2

Huffco Petroleum Corporation proposes t< Supplemental Plan of Exploration to d r i l l three additional wells on South M^rsh Island Block 234 to further evaluate the subject lease to determine the potential for future development.

Exploratory d r i l l ng of the f i r s t well is scheduled tc commence approximately February 21, 1986, subject to the approval of this Plan of Exploration and issuance of the required Permit to D r i l l . Exploratory dr i l l i n g should be completed by July 6, 1986.

I t should be emphasized that this schedule is tentative in the meaning of 30 CFR 250.34-l(a). Additional exploratory d r i l l i n g must be predicated upon the need to define structures and/or reservoir limits. The fabrication and installation of platforms, producing f a c i l i t i e s and pipelines are contingent upon the success of the r wells. In addition to the dr i l l i n g of wells, other activities which may bt conducted under this plan would be the setting of caissons or a template over temporarily abandoned wells, a velocity survey in a wellbore and soil borings.

PLAN OF EXPLORATION

OCS-G 4436

DESCRIPTION OF DRILLING VESSEL

Section 3

The water depth in South Marsh Island Block 234 approximately 15 to 20 feet.

A submersible rig similar to the "Teledyne Movlble Rig 2" will be utilized for exploratory drilling. A description of the rig, including the diverter system Is included in this section.

I

magna OF WBQBBSL i£&naa& Elf, Wo. 2

DRILL mXHC

B.O.P. EQUIPMENT

DERRICK ft SUBSTRUCTURE

DRILLING EQUIPMENT

- 2000 feet 3" o.d. 19.S l b . / f t . Range 3 Grade G d r i l l pipe vith 4-1/2 IP tool joint*.

Twelve 7-1/4" x 2-13/16- x 30' d r i l l col lar* w i t h l i p grooves and 5-1/2" regular connections.

- On* Budr l l 13-5/8" SH annular blowout preventer.

Thro* Cameron 13-5/8" SH Typo V aingle blowout fitiaatan.

Ont Csmeron 4" SH hydraulic operated valve.

One Movible 5000 pal choke Manifold with:

Two 4" 5000 pal Cameron valves. Eight 2" 5000 pal Cameron valves. Two 2" 5000 pal adjustable chokes.

Ono Koomey Model T222-2BD-1-6H, 180 gallon capacity. 3000 pal working pressure, cont ro l unit wi th a i r operated and e lec t r ic driven hydraulic pumps.

One Koo.uey S-80 remote control station.

On* Gray inside blowout preventer with 4-1/2 ZP connections.

Two 5000 pal TZV valves with 4-1/2 IP box x 4-1/2 IP pin.

Ideco Pull View 143' height twist, rated at 1.015,000 lb*.

National Ideal 30' wide x 76* 8" long x 13* high »ub-•tructur* with 650,000 lb. casing capacity and -4)0,000 lb. tet beck aud pan* and drain* Installed.

National Ideal Model 654-P 450, 500 ton capacity traveling block grooved for 1-1/2" wireline.

Ideco Model 46503 560 ton capacity crown block grooved for 1-1/2" wire l ine.

National H-1324 swivel rated at 500 tor...

Byron Jackson Hodel 5500 Hydroflex 5 hook rated at 500 tons.

Bevlsed 10-93 • 7 -

MOVl&Ut RIG" 2. 5M BOP 5TACK

6"AIR ACTUATED BUTTERFLY VALVES

EXTENDS 50" OUTBOARD

4"-5M NCR VALVE

(BOTH HCR VALVES

OPEN SIMULTANEOUSLY /I

WHEN ANNUL A R CLOSES)

STACK

NO. Q7Y. DESCRIPTION

BILL OF MATERIAL

MV •ATI M

RIG 2 <FOR>-

TELEDYNE MOVIBLE OFFSHORI

^TELEDYNE MOVIBLE OFFSHORE II

JRLE D

NTS.

ORAMlMOCMKa

02-23-63

I M M U W O C M I

I M I T N O

083. 'PTES: SHADED ITEMS NOT NORMALLY CONTRACTOR FURNISHED DIVERTER SYSTEM

IMXXMO

MW. MA _ K

PLAN OF EXPLORATION

OCS-G 4436

SAFETY AND ENVIRONMENTAL SAFEGUARDS

Section 4

Safety features during d r i l l i n g operations w i l l include well control and blowout prevention equipment that meets or exceeds the requirements of OCS Order No. 2.

011 in any form shall not be disposed of into the waters of the Gulf.

Liquid waste materials containing substances which may be harmful to aquatic l i f e or wildlife, or injurious in any manner to l i f e or property shall be treated to avoid disposal of harmful substances into the waters of the Gulf.

Drilling muds containing o i l are not disposed of int., the Gulf. This type of material 1s loaded and barged to shore for proper disposal. Drilling mud containing toxic substances is neutralized prior to disposal.

Drill cuttings, sand and solids containing o i l are not disposed of into the Gulf, unless the o i l has been removed.

The subject offshore mobile d r i l l i n g unit is equipped with drip pans under the rig floor. All o i l from diesel engines is pumped to a sump and then pumped into barrels for return to an onshore site.

Operator personnel are instructed in the techniques and methods necessary to pi event pollution. Non-operator personnel are instructed and supervised to insure that non-pollutlon practices are adhered to.

The facilities are inspected daily.

OIL SPILL CONTINGENCY PLAN

Huffco Petroleum Corporation's Oil Spill Contingency Plan has been approved by the Minerals Management Service. This plan designates an Oil Spill Team consisting of Huffco Petroleum Corporation personnel and contract personnel. This team s duties are to eliminate the sources of the o i l s p i l l , remove all sources of possible ignition, deploy the most viable means of available transportation to monitor the movement of the slick, and contain and remove the slick 1f possible.

Huffco Petroleum Corporation is a member of Clean Gulf Associates (CGA). The CGA has 4 permanent bases 1n Louisiana; at Venice, Grand Isle, Intracoastal City and Cameron, and two bases in Texas; at Galveston and Rockport. Each base is equipped with fast response skimmers and there is a barge mounted high volume open sea skimmer based at Grand Isle. In addition to providing equipment, the CGA also supplies advisors for clear, up operations.- Response time for a s p i l l in South Marsh Island Block 234 would be epproximately 4 hours depending upon the location of company operated workboats or workboats available for charter.

PLAN OF EXPLORATION

OCS-G-4436

APPROXIMATE LOCATION OP PROPOSED WELLS AND PLAT

Section 5

South Marsh Island Area Block 234 i s loceted approximately 19 miles from the nearest shoreline o f f the Louisiana Coast. A v i c i n i t y p l a t Is shown i n thi s section.

WELL NO. PROPOSED LOCATION PROPOSED DEPTH

C Surf: 3550' FEL 3300' PNL TVD: 10,800'

Surf: 5350' PEL 3900' FNL TVD: 10,800'

Surf: 650' FEL 5600' FNL TVD: 10,800'

' Public biforriiati PUBLIC INFORMATION

f ban}

•O

5

3 4 4

I I I I

fTD 10,800'

0 -

0

2 4 8

SOUTH MARSH ISLAND BLOCK 234 Offshore Louisiana

Supplemental Plan of Exploratii n

0CS-G-4436

PLAN OF tXPLORA'. ION

OCS-G 4436

STRUCTURAL INTERPRETATIONS AND SHALLOW HAZARDS REPORT

Section 6

SHALLOW HAZARDS PSPOr.i

SOUTH MARSH ISLAND AREA BLOCK *34 WELL NOS. C, D, AND E

Huffco Petroleum Corporation has re"iewed the geophysical data p o i ' f i -nent to Souti Marsh Island Area Block 234. Tl.is data, obtained by Racal-De':'j* c»;rvey. Inc. f o r Getty O i l Company included sub-boctcn p r o f i l e r , r,.fLJier, side-scan sonar, echo sounder, and magnetometer.

Huffco has J cviewed a l l available data (over and proximal) to t ie surface locations of proposed Well Nos. C, D, and E located 3/55C FEL and 3300' FNL, 5350' FEL and 3900' FNL, 650' I'EL and 5600' 7UL, respectively. This survey shows one anomaly (16'' .'t.ineco pipel '* "») NNE of the pr.-)oussu locations. This gas pipeline Li. mds n o r t h v a r t a r l y through the no; ..least corner of Block 234. This p.« pelin« w i l l bo marked by bouys .'n accordance with NTL 83-3 be.S _e operations «• Mseonce.

Locations C and D i r e o i a- indicated character change (Fig. 7 • A Multi-Sensor Engineering ''urv?y of South Marsh Island Block 234 or Getty O i l Company"). H ,*•» • ?r, a f t e r careful scrutiny of the ra*. . \ t a , i t i s the opinion of Huf ,:co Petroleum that tr.. P "haracter change i s due to a processing or rata c o l l e c t i o n problem, ^ided precautions w i l l be taken while d r i l l i n g at these locations including 200* of penetration w i t h our drive pipe.

Expicration Manager

PLAN OF EXPLORATION

0CS-G--4436

OI SHORE SUPPORT BASE FACILITIES

Section 7

Huffco Pen-oleum Corporation - . • i l l use existing onahore base f a c i l i t i e s loceted et Freshwater City Offshore t t Anal loceted approximately 10 miles east of Kaplan, Louisiana. This w i l l serve as port of debarkation for supplies and crews. No onshore expansion or construction i s anticipated with respect to this acti-'ity.

This base is capable of providing the services necessary for proposed a c t i v i t i e s I t has 24-hour ?«rvlco, a radio t.wer with phone patch, dock < J ce equipment arid supply storage base, drinking ar J i- '.11 water, etc.

rUN OF EXPLORATION

OCS-6 4436

MUD COMPONENTS

Section 8

i

t

MUD COMPONENTS

COMPARABLE MUD PRODUCTS

1. ITEMS uSCD ON A Rf-uTINE BASIS

IMCO

IMCO Ba

IMCO Sel

Imco Lig

RD-111

Caustic Soda

Alumi num Staarate

Lime

Imco Thin

Soda Ash Bicarb

Poly Rx

IBKO Ky

Fur 4>ar.

CHROMALOY

Barite

Bantonltt

Lignite

C1-CLS

MILCHEM MA6C0BAR

Barlte/Milbar Barita/Magcobar

Milgel

Ligco

Uni Cal

Aluminum Staarate

Lima

Soda Ash Bicarb

Detergent

FB-3

Aluminum Stearate

Lime

Ligcon

Soda Ash Bicarb

Chentr»VX

M.D.

LD-8

Magcogel

Tannathin

Spercene

Caustic Soda Caustic Soda Caustic Soda

A !'iminum Stearate

Lima

Xr-20

Soda Ash Bicarb

F.esinex

D-D

Maqconol

DESCRIPTION

Barite

Bentonlte

Lignite

Blended Ligno­suifonate

Sodium Hydroxide

Aluminum Stearate

Calcium Hydroxide

Modi"."*ed Lignite

Sodium Carbonate Bicarbonate of Soda

Selected Polymer Blend

Detergent

Defoamer (Usually alcohol based)

I I . !»'.* • 'ED LESS FREQUENTLY

IMCO CHROMALLOY MILCHEM MAGCOBAR

DMS DMS DMS DMS

l aco Loid Starch Mil starch My Lo Gal

CMC Dnoscos Reg. CMC CMC

Cypan Cypan Cypan Cypan

Permaloid Star lose Perma-Lose Poly Sal

Drispac Drispac Drispac Drispac

Gyp Gypsum Gyp Gyp

HME/Super- Hme/SuperdHl HME/Superdril HME/Superdril dnl

Black Magic DFT Supermix

Black Magic Black Magic Supermix Supermix

Lubrikleen Clean Spot Lubrisal Magolube

Imco Myca Mica Mil-Mica Mago-Mica

Imco Plug Nut Plug Mil Plug Nut Plug

Ironite Ironite Ironite Ironite

Zinc Carbonate Mil Card

DESCRIPTION

Nonionic Mud Surfactant

Pregelatinlzed Starch

Sodium Carboxy Methyl Cellulose

Sodium Polyacrylate

Organic Polymer

Polyanionin Cellulose

6ypsum (Plaster of Pans)

Gilsonlte (Treated) Natural Hydro­carbons • Wat­ting Agent

Mud Concentrate for spotting fluid

Organic Lubricant

Mica-Flakes

Ground Walnut or othar nut hulls

Synthetic Iron Oxide. H2S Scavenger

H?S Scavenger (Zinc Carbonate)

I I . ITEMS USED LESS FREQUENTLY (CONT.)

IMCO

Separan

Salt

SAPP

KCL

CHROMALLOY

Separan

Salt

SAPP

KCL

I I I . OIL BASE MUD

IMCO Spot

Kenol-S

Ken-Gel

Clean Spot Concentrate

Dal-Vert

PE-11

SE-22

DFT

Da Hon

Ken-Cal-L Del-K Wa-33

VR HTS Dal G Del G II

MILCHEM

Separan

Salt

SAPP

KCL

Mil-F ree

Carbo-Tec

Carbo-Gel

Carbo-Mul

Carbo-Trol

MA6C0BAR

Separan

Salt

SAPP

Shale Trol

KCL

Pipe Lax

011faze & Vertoll

VG-69

DV-33

DV-22

DESCRIPTION

Polyaery1amide Polymer

Sodium Chloride

Sodium Acid Pryophosphete

Ograno/Aluminum Compound

Potassium Chloride

Emulslfiers for spotting fluid

Emulslfiers. Gelling agents and fluid loss agents for oil muds

Organiphilie clays for vlscosifylng

Asphaltic Viscosifier

Organic wetting agents.

Fluid loss agents

4 ilii HiliMlllinil!

P.O. Box 218753 Houston, Texas 77218 713-558-0607

January 20, 1986

PROJECTED AIR EMISSION SCHEDULE FOR SUPPLEMENTAL EXPLORATION PROJECT

GENERAL INFORMATION

Location of Fac i l i t y :

Distance Offshore: Name of Rig/Platform: Operator:

Contact Person: Total Well Footage to be D r i l l ed : Total Well Footage to be Dr i l l ed in 1985! Date Dr i l l i ng Wil l Begin: Date Dr i l l i ng Wil l End:

South Marsh Island 234 OCS-G-4436 19 miles Submersible Huffco Petroleum Corporation P. 0. Box 4436 Houston, Texas 77210 Barbara Dougherty 32,400' 32,400' February 21, 1986 July 6, 1986

MAJOR SOURCE (OFFSHORE)

Power used aboard drilling vessel; approximate footage to be drilled 32,400'.*

Emitted Substance

CO

so, NOX VOC TSP

Projected Emissions (lbs/day*»tons/year]

( 95) 6.42 ( 30) 2.04 (446) 30.13 ( 36) 2.43 ( 32) 2.14

Based on 60 hphr / f t . from Table 4-3, "Atmospheric Emissions from Offshore Oil and Gas Development and Production", EPA No. 450/3-/7-026, June 1977.

** Emission factors from Table 3 .3 .3 -1 , "Compilation of A i r Pollutant Emission Factors", Third Ed i t ion , EPA Report AP-42, August 1977.

Projected Air Emissions South Marsh Island 234 Huffco Petroleum Corporation Page 2

MINOR SOURCES (OFFSHORE)*

Including helicopter landing and take-off (7 trips/week); supply boat (7 trips/week) and crew boat (4 trips/week); loading and unloading operations.

Projected Emissions (tons/year)

Emitted Substance

CO

mi VOC TSP

.78

.02

.17

.08

.03

* Tables 3.2.1-3, 3.2.3-1, and 2.1, "Compilation of Air Pollutant Emission Factors", Third Edition, EPA Report AP-42, August 1977.

TOTAL ALL SOURCES (TONS/YEAR)

1985 CO so2 NOX VOC TSP

Major 6.42 2.04 30.13 2.43 2.14 Minor .78 .02 .17 .08 .03

Total 7.20 2.06 30.30 2.51 2.17

ONSHORE SOURCES

These should be about the same as minor sources unless new facilities are installed at the onshore base. No additional facilities are required or planned at this time.

EMISSION EXEMPTION DETERMINATION

For CO: E = 3400D2/3 = 3400 (19) 2 / 3 = 24,209 Tons/Year For NOX, VOC, TSP & S02: E = 33.3D = 33.3 (19) = 632.7 Tons/Year

As per DOI/MMS regulations, this facility is exempt from further air quality review as i t has been determined that its operations will not have a signi­ficant adverse environmental impact on air quality.