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In Reply Refer To: RP-2-1 . 4 .
Anadarko Petrol mm Corporation At tent ion: Mr. Ronald A. Bain 16831 Greenspolnt Park Drive Houston. Texas 77060
Gentleoen:
Reference 1s cade to your I n i t i a l Plan of Exploration ano Envlromaental Report received February 10. 1586. for Lease OCS-C 7626. Block 477. West Caaeron Are*. This plan includes the a c t i v i t i e s propoeed for Wells A ami B.
In accordance wi th 30 CFR 250.34, revised uecenber 13. 1979. and our l e t t e r dated January 29. 1975. th is plan lias been determined to oe cos* le te as of February 24. 1986. and is now being considered for approval.
Your plan control nucfcer is M-2407 and -.hould be referencej in your coRBunication and correspondence concerning th is plan.
Sincerely yours,
(Orig. Sg^) A. Omwirt fJno.r
Acting Regional Supervisor Rules and Production
bcc: Lease OCS-G 7626 (OPS-3-2) (FILE ROOM) /OPS-3-4 w/Public In fo . Copy of the „ lan and ER (PUBL.REC.)
DO-F
MJToibert:gcw:r./19/86 Disk la
Office of Program Services
FEB 2 8 1986
information Sarvces Section
A N A D A R K O PETROLEUM CORPORATION I 6 8 O I GHEENSPOINT P i B K DRIVE • HOUSTON TEXAS 7 7 0 6 0
C - v . J . O - . t m l ^ Q4»S>V>OH W N A f i f V
January 8, 1986
Mr. Don Solanas Regional Oi l and Gas Supervisor Minerals Management Service P. O. Box 79 W Meta i r ie , LA 70010
Re: Plan of Exploration OCS-G 7626 Block *77 West Cameron Area, L A
Gentlemen:
West Cameron Block <*77 is a tract obtained in Federal OCS Sale 98 held May 22, 1985, for a lease bonus of $4.286M.
The participants in this t ract are:
Anadarko Petroleum Corporat ion 41.667% Energy Development Corporation 33.33 3% Pioneer Production Corporat ion 25.000%
Anadarko Petroleum Corporat ion is the designated operator for the block. Consequently, we are submitt ing the enclosed Plan of Exploration for your approval so that we may evaluate this lease expeditiously.
Two well locations are proposed in the Plan cf Exploration and described in Section One, accompanied by the fol lowing:
A) A location map showing 'ease block relat ive to the shoreline and onshore support base faci l i t ies.
B) A map showing the location of the proposed wells.
C) A seismic structure map.
The construction hazards and archeological survey was done by lonn Chance and Associates, I n : . , and is being submitted concurrently wi th this plan. The Anadarko Petroleum Corporation base of operations wi l l be located in Intercoastal C i ty , Louisiana. As an active member of the Clean Gulf Association, Anadarko has immediate access capability to the Clean Gulf Associates oil spill containment equipment stockpiled in Cameron, Louisiana. The Clean Gulf Base is located approximately 8<* miles from West Cameron Block k77. Therefore, the oil spill equipment could be on location within nine hours of not i f icat ion.
Mr. Don Solanas -2 - January 8, 1986
Anadarko Petroleum Corporation has an Oil Spill Contingency Plan currently in your fi les. Included in this report is a list mud additives and components that could be used in the dr i l l ing program.
The environmental impact report was wr i t t en by John Chance & Associates, and describes the environmental and socio-economic impacts associated wi th our explorat ion act ivi t ies in the area.
Exploration and any future production act iv i ty in the West Cameron Block 477 area wi l l be conducted tn a manner consistent wi th state and Federal requirements for coastal zone operations. Act iv i t ies associated wi th this plan wi l l be executed in compliance wi th all OCS orders, memoranda, and any required permits wi l l be f i led on a t imely manner.
Anadarko, as an operator in the Gulf of Mexico and a member of the Clean Gulf Associates wi th the appro d Oil Spill Contingency Plan on fi le wi th the U.S.G.S., intends to exercise al l ence towards the protect ion of the environment while implementing this Plan oi exploration.
Very truly yours,
A N A D A R K O PETROLEUM CORPORATION
Rc,.'«ld A. Bain Expl orat ion Manager
Enclosure
PLAN OF EXPLORATION - WEST CAMERON BLOCK 477
Block »77 f A - Surfa, e ocation 4200' FSL, 6300' FWL BHL - ^ e. TVD 9000'
Block »77 #B - Surface Location 2750' FNL, 6250' FWL BHL - same. TVD 3000'
The ini t ia l well (expected to be the "A" location) wi l l be spudded as soon as permits are approved and a jack-up rig is contracted. Spud date should be no later than 3rd quarter 1986. The well is expected to take 30 days to dr i l l and complete. Upon dri l l ing the f i rst wel l , a decision w i l l be made concerning act ion on the "B" location. Both proposed wells are considered expendable and wi l l be plugged and abandoned with casing cut below the mud line after they are completely evaluated.
SITE SPECIF IC SHALLOT. HAZARDS R E P O R T
During October 1985, John Chance and Associates conducted a high resolution geophysical survey of West Cameron Block 477 tor Anadarko Petroleum Corporation. Instrumentation included 24-fold 16 KJ Sparker, seafloor mapping system, magnetometer and sub-bottom prof i ler.
Water depths derived f rom pinger (prof i ler) data range from 124 feet in the northeast to 132 feet in the southwest corner of the block. No unusual topographic anomalies such as shoals, outcrops or depres
sions were noted.
Magnetometer, sidescan sonar and other data conf irmed the position of the two pipelines which cross the block.
One unidenti f ied magnetic anomaly, measuring 5 gammas was noted near S.P. 13, Line 19. No corresponding sidescan contact was made and i t is suggested that the anomaly may represent buried bottom debris. No exploratory act iv i ty is planned in this v ic in i ty.
Pinger anO analog sparker data indicate a down-to-the-east NE/SW trending fault and areas of acoustic voids believed to represent low pressure biogenic gas 5 0-100 feet below the seafloor. No amplitudes suggestive of pressured gas were noted.
A t location "A" (i»200' FSL and 6300' FWL) the water depth is 130 feet . The location is outside the low pressure gas zone and 4000 feet f rom the fault on the downthrown side. Thus, neither the shallow gas nor encountering the faul t at t4000 feet should pose a hazard to operations at this location.
Locat ion "B" (2750* FN>L and 6250' FWL) lies in 128 feet of water. I t is outside the biogenic gas area upthrown to the down-to-the-east
faul t . Neither the shallow gas nor the faul t , located 1000 feet to the east, should be seen by the proposed wellbore.
In conclusion, the data gathered by John Chance suggests tne locations selected by Anadarko for possible oil and gas exploration are free of seafloor irregulari t ies, shallow gas or fault ing which might const i tute an unusual dri l l ing or construct ion hazard.
Robert L. Sims Geophysical Advisor A n a d a r k o P e t r o l e u m C o r p o r a t i o n
January 9, 1986
F 5 - JJ ,L"" " f T ? ? W l - g — L 3 • >g ':: •(•••'
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I • • : : : > . : : • > : : : : : • : : : : : ? : - : : : : :
ffi
WEST CAMERON BLOCK 477 OCS LOUISIANA
INDEX MAP
476
©
477
0 '
0 0*
491 490
PtMrotoum Corpora t ion
9 WEST CAMERON BLOCK 477 O C S L O U I S I A N A
EXPLORATION PLAN WELL LOCATION
S C A L E : l * = 2 0 0 0
DESCRIPTION OF DRILLING RIG
The attached schematic and specifications sheet describe the
type of drilling rig Anadarko anticipates using to drill the
well in the Plan of Exploration. The specific rig which will
be utilized is similar to the JU-200 MC.
JO200MC Mat< supported cantilever jack-up drill rig
The JU-200MC in operating position. Cantilever feature can place .otary as far as 45 feet astern of pkattorm
JU-200MC
Nominal Dirneniiuro
Ptartorrn 157'x132'xi8' Mat 2 2 0 ' x 1 8 o ' x « '
+ 2'$kirt Slot 5v"8"x«0 'wiae Coiurm.. (3) 11 '00x260' long
. Nomina) Ccpacrties
Max variable loads: Drilling 2.250 tons Moving (23' Nom Oraft) 1250 tons Moving (n "6" Draft) 350 tons
Dniling Water 5.900 Obi Fuel oa 2.000 DDI Potable Water 1000 boi 'jguid Mud 1.500 bbi Bulk Mud & Cement 6.000 cu ft Bag Storage 3.000 socks Pipe Rack Area 3.000 sa ft Quarter? 51 pers Skiddabte Substructure
for 1390.000-lb Demck
Design Operating Goodmans
Min. Maneuvering Depth: H '6" Non-
Hurricane Hume ane Max Stttl Water Depth S175 ft @200ft
Max. wave Height 60ft 33 ft Wove Period 15 sec 10 sec Design Wind
velocity ATMs 70 kti Mr\. Air Gap 45 ft 26 ft
Bethlehem's series of cantilever jack-up drilling rig designs include the mat-supporiecJ JU-200MC (to 200' water depths). JU-150MC (150 * waters) and fhe JU-100MC (100' waters).
Bethlehem ffl Bethlehem Stee l -Sh ipbu i ld ing
•eaumont *rafc PO to 3031 Beaumont, rx 77704 • Coil (713) 838-6821 • feter 77-9441 Cnt>»ei 9FHSH*> New >tork Bethlehem Singapore me. Ud_ PO to 41. Semoowang Post Cffce. S*ncoore 9175 Con 257-4745 tsiex RS21770 (BETHPOR)- CaDiev BETHSNG S*rgaDc-« Executive and General Sole* Martm fewer. Betmenam. PA 18OI6 Can (215) 694-3763
r-oide» 33«A Data currert ca of 4 . •» atymn
PLAN OF EXPLORATION
WEST CAMERON AREA BLOCK 477
OCS-G 7626
MUD ADDITIVES
The attached list of mud additives is anticipated to be used
in drilling the wells outlined in this Plan of Exploration.
COMPARABLE MUD PRODUCTS BY TRADENAMES
Descript ion IMCO SERVICES Baroid Magcobar MUchem
WEIGHTING AGENTS AND VISCOSIFIERS
Primary Application
IMCOBAR Baroid Magcobar Mil-Bar Bante
Calcium Currxirute
Bentonite !MCO GEL Aquagel Magcogel Milgal
IMCOWATE Lo-Wau W.O. V W O. Jv.
Sub-Bemonite IMCO KLAY Baroco High Yield Green Band Blended Clay Clay
F-r increasing mud weight up to '•• "Pg-
f-'- ncrcasing weight of oil muds IU iu.s ppg
. Viscosity and filtration control in water baae mum
. For uae when larger particle sue u a aired (or viscosity ind nitration control.
. IMCO BRINEGEL Zeogel Salt Gel SaliWaierGei vncoiifief m u a water muds. Attanuigite
Be :<euied IMCO HYB Qtuck-Gc! Kwia-Thtk Super-Col
Bentonite
Asbestos Finer* IMCO BEST Floaal Floaal Fiosal
Bactenally Produced . . . . IMCO XC XC Polymer Duovii XC Polymer . . Polvmer
. Quick viicu.uy in fresh water upper nole muds witn minimum chemical treatment.
Vocosiiisr for fresh or salt w»ur muds.
Viscosifier and fluid low control additive for low solids muds.
DISPERSANTS Sodium IMCOPHOS Barafos Magco-Ph-jt Oil Fos Thinner for low pH fresh water mud*.
Tetra phosphate
SAPP SAPP SAPP SAPP . Fcr treating cement contamination. S«idium Acid Pyrophosphate
Quebracho IMCO QBT Tannex M-C Quebracho . . ' ranco Thinne • water and lime Compound muds.
•mines, Extract IMCO F L O .
Modified DESCO Tannin
.De
. R ay llo Ray llo Thinner for fresh water muds and in muds comxi.itng salt (10.000 to U.0O0 ppm i.
. Desco Desco Thinner for fresh and sail water muds alkalized for pH control.
Mined Lignite IMCO LIG Carbonox Tana A Thin Ligco Dispersant. emulsifier and suppsemea-tary additive for fluid loss control.
CiuMici/cd Lignite IMCO T H I N CC-16 Cauatilig Ugcon 1-6 ratio caustic-ligTiiir dtspersani. emulsifier and supplementary lluid loss additive.
Calcium IMCO C A L . l.ignosullnnaie
Modified IMCO VC-10 LignoMillonaic
. Q-Broxin
. Kemoreak
.Spcrtenc..
. Thinner for SCR and lime muds.
, Um-Cal Dtsperum and fluid lots control additive for water base muds.
Blended I igrtmul- I M C O R D - I I I Blended multi-purpose dispersant. fluid loss loruic Compound agent and inhibitor (or IMCO P D-l 11 mud
systems.
FLUID LOSS RSDUCERS Pregctaiini/cd IMCO LOID Impermex Mv-Lo-Jel Milsurch Starch
StHlium Carhoxv- IMCO CMC Cellex Magco C M C Milch*.. CMC. metnvl Cel lu le* 'Regular* (Regularl (Regulari (Mcd-Visi
Sodium Ca-'husv-mctnvi Cellulose
Sooium Carhoxv-meinvi Cellulose
v anionic CCIIUIOMC .•lymer
IMCOCMC Cellex Magc>-CVC Mi lchcmCMC. (H.-V.si (Hi-Visi ( H I - V I * I ( H I - V I M
'MCO CMC Cellex i Teen Grade• i Teen Grade)
Magco CMC I Tech Grade)
MilchcmCMC (Tech Grade)
Sodium CYPAN Poo a crv late
Sodium Polvacrvtatc
DRiSPAC Drispac Drrspac Drunac .
Cypan Cypan Cypan .
WL-100 WL-100 WL-100 WL-100
. Controls fluid loss in saturated salt water, ume and SCR muds.
. Fur fluid loss control ana bame suspension in water base muds.
. For fluid loss control and viscosity building m low Miiids muds
. For fluid loss control in gyp. *ca wster and i run water fluids.
. Fluid loss control additoe and vi»cosiiier in sail muds
. Fluid loss control m calcium-iree low sonds and nondispersed muds.
Fluid loss control in caleium-iree low solids and non-dispersed muds
l o i
CCiT<r '3ABLE MUD PRODUCTS BY TRADENAMES — CorMf;•:««*;
IMCO SERVICES Baroid M.ocotw Milcfwm
LUBRICANTS, DETERMENTS, EMULSIFlEP. t IMCOEP EPM.-d Lube Bit Lube Lubo-Fjm I M M water m m aa—aa k B M i H M L U K pteesuit .'wbneny
P i—amd SOLTEX Sottex Soon Sokes . m m m e r a — e m l a u> la—* iea>n-Hydnnaraiat *ev I t U loat M a n — I——1 thaie
Water CHtpenubkt IMCO STABiL- i r i - w u m m Mtm flea) taa r a t a — (or water HOLECOAT HOLE aaaa nv-ja coat— ao4mme.- crude aal
Oil Onperwbte IMCO ferae* Pive-A-Hote Cerfco-Seai Lahntaet aad f l m f r a reducer for water MUD OIL km***- bear - - j , I ' . U ' . . ... darstl or crude oU
OuSouib* IMCO 3kot-Fret Pipe Lax Pauaaana New-—. I - !• ,J Iw .po t l i a j to free FREEPIPE differr. A I , B W X pipe.
I M C O M D C a n l X i D-D M a t t — M D U a a j t a a — - m m - tmatoaaesagrBM'ag •and. t vitsu •» e-. reduces torque aad -mu iiarri rm-a*.. m\
N o n - l o m c E m . ^ w DM-l AJoaAo-C SurFak- r . . . OME LmkUsafter(«. m t W * m a s s —
lo f aa aaa- IMCO SWS Tnmuiao Saia— AttoaelA EmukuficT (or iai: and fresh wr.tr muai Surf i n — AtioaoiS
An Organ* Entity IMCO TorqTrtm OOS-3 MaVPI—2 Suvpi.es i tx 'ubncaunt prjpert*- j o,u LUBAIKLEEN without ca ' i -onmemai pe Ihit ior
B i r v Fairv Aoaa. — IMCO SPOT SF '.00 I nvan aaa—oa mmmm may aa mmfmn to c u i - 410. A Asphalts; mmm) da—iy lor aaottaay to (rat Mat T a b different ally Mucx pipe
DEFOAMERS, FLOCCVLANTB, BACTERICIDES Aluminum Aluauauai A l — M l Ate i • r an Aluminum Defoamer I or I i f to* >U< S iaa rate Staaraat Saaaratt Sfar. at
Sodium .ikyi Aryi IMCO DC FOAM M a l i a i i l r > , Sulfonate Dafoamer
Surface Active IMCO "MO LO-T A. D — m b e t Liosud FOAM BAN / 'NO
FVaeaaaanf A a m IV ~ 0 F L f 1 . . aarafloc Float? Separan Used to droo o,,-~i .x-dt where dear water a aaai ra t i g ' - • rtUrag fitud-
Paraformaldehyde I^CO Aidaode My-Lo-Jd Preservative Pi11 i a u a a m . (rom i t—ni iag when nam I fJ ' .V. * " ' A LO!D P i — n ative m mad* a l mm Math aatartaaa or •Itaaaary
ana tear I Occ
LOST CIRCULATION MATERIALS F m — t Material IMCO TV BER Fiberus Mud Fiber Mit-Fiber Filler at • * 1 ts mattini mater
Ftaroaa Mtatral IMCO WOOL M aaat Waal MaVWool Often aata * arat* watrt acta.-, ••ritter
Wool tmptoyad to daatroy taa • M a w *
Wat— SMfav
Ftor IMCO PLUG Watt-Mat Nut-Plug Mi M M offer uaad to pm tat oatc HHM*,
Modi— , * . ~ 0 PLUG Wair-Nut Nut-Plug M iM MM I M tn coaraaGuoa ama flat.-, or >* t t to
'.MCO PLUG Wall-Nat Vu-Ptag Mtt-Phtg Uaad where urge r m i — m ira.tanrtare
Ground Mua
IMCOfe ' iTA Micatex M a e > M m . Milmtea U a e d l » r f r e v r . i l o t t c - . 'mon.
Coarat IMCOMYCA Miaa ttx M a f c t v M m . . . M i a n — . . . . . F o r m a good mr. H I — of well bare
Calk—am IMC*) FLAKES Jei Flake " - ' W S o ' MiMkfcc Uaad to r cpm I _ ..rcuai.on
Coatbmiioa irf IMCO Kwsa-Seal ".wak-Seal Kwik-Seal Laad where large crevices at iractures« granu /». flakes. KWIR SEAL encoomereri
teruls of venatst v m in nat sack.
S l e — e d h — 0 — D M SEAL M Psv ami V .D—aalM Osteal M One tack mixture ior prrpenng toit piug-'o— tofi ttaajtag for severe km circuausov
1*9
COMPARABLE MOw PRC DUCT!, BY TP*Df.N- . ES — Continued
IMCC SERVICES •aroM \^kj*hm Mtichom
•rui- mro. I MCO SCK T-« C*k-J
' • I 11
S I M M
Sod'
I M C O G E L E X
D M S AktafaaS Serf at »• : 'MS.
IMCOPT-IQ2 Coai-CIIM W U C W ^ K . - Am ' . <
Coat-413 No,»
IMCOSULF-X M^CwrC
Soda A M I
C0MMERC1AI CHEMICALS S o d i u m .
C h r o - i » u
i ' l . rv . - J u a t r a j t a e l u r f l l l B J ' I o M l i , - ;»JU» .
.laetvt-Jt* ?«« f t e r n M w f s n i M r , lowac-i* . 'm tag . . .
Pr imary , , H i a a t i 10 i a a a n i a g lur tactarx aa ta . •* . . -t aaaa ui aca a a t i (or VJJOB wry t i t * , i . .
. Far tae nt »r oaicy araa* a i O A * ataaa.
For aaa aaa In jaajaj wiwat anaaar I •
Ut l a m e n t - : m a i K t o r
, 10 p.• J I - • ' .T a a i ar r . r f l c c a i •vtor.
. Caaauc Soda For an caat/ t ' at wat* »»»*»,
SedaAea . For t:« . i B g o u i c a « " . . , i t u i i a i e :r. «
i v a ' i u o r raoa
C a . t a
Ca l c ium Sul fas! G , t W
s t c i u m H y d r o s ide . L U M . .
Sod ium C h l o r i d e
A a h y d r o t For .- tting out c m W r 10 (or b a a
,.SWMI tol arrow(orformulatingmf
Sal:
Chroaat < u.-o ,
Sail
Chrome A l u m
Salt
C k rt ' * • am
-Salt
Chrome A l u m
, -''Jt r . c t ' . i u m l o r f o n a u l a i i i f ume i.->u a,
F o i ui . l t d i a : i m u d l snd r r s u i i v n v
ichrc
I a v a n Emulator) Sysurm
\ .om *•»» Iwv.
•OV 1W
. F j r k u - craaa-iiaau>f XC M i a t t ' tyauati
OIL BASE AMO INVERT SMYA L S I O N SYSTEMS Vane- : . Careo-Tec . . ' C O K E N O L - S
tnd I M C O K E N - X
IMCOOIL-X L t f .OM
. D n t l i a f fiuaas atad where e x t r e m i t y h i f h 11 rnatn'am a r t t ncoaatar rd t a o a d r i l l i n g companion or w o r t o ' e r f l u i d apBuca .* w a m o a r y o d c a e t a c i w a h iormai toAu t t dct t rad.
Intxaaaarve in ven uaad wft*r« low densnv mud t a r t used and low i t m p r a m m arc
I M C O K E N - O i i f . ^ i
SUFHEME For u n i t i n g water arnsitrve (o
* e un m o j t I M C O K E N - P A K Oil R a x Fluid
3.5-100 A time setting gelatinous ail pack (or casing recovery aad corrosion c o n t r o l .
OIL MUD ADDITIVES P r i m a r y E i r tdaa le r I M C O K E N O L - S i D i . . Invermul Vested C a r b o - T a c l D l Pruaary a d d i t r v c s t o f o r m s u M a w a t e r i n -
I f¥3 BMd O i i i m u t o a f M I
I M C O K E N - X Corse. « K L i C a r b o - T a a L l
Ge i l . ng Agent I MCO K EN-GEL Cef-Toee VO-e* Cirtso-Gei aat) and
IMC0 1EN.XC«>ac.«2 Petro-Toat
a -ry. riltratsoa c ; , i r o .
tnd
Staatkrer
viabi t i res Borehot t C o n d i t i o n s
Disperse M
C j K . u m O s . d e
I M c O k E N - X
C c c O Duratone H i D V - 2 2 a n d .
D V - 3 3 I m p r o v e t e t i Conditions
jfcston under hign t e m p j r a l u r t
I M C O VR Stabilizes running tnast. improves emulsion weight tus pension, and f l u i d lots under fc,eh temperalure condi t ions.
I M C O K E N - O M C aad V e n a ta aad Dope r. ant f o r reducing rhcoiog>cai T H I N D n l . r e s i S E - I I p r o p e r K V
I M C O K E N O X CaJcium sow nat (or savoniTicaiuia
183
COMPARABLE M ) PRODUCTS BY TRAD EN MES — Continued
Fun Acad • EmutMiwT
srxnr.cnu Modif* Sat.-onu.ctf Fatty A o o Cnermeai t
Finely D ' V « W t S..'cate
IMCO SERVICES •efoM
O I L r . ' J C # . 0 D i T I V E S — C o n t i n u e
MNVaTWill r-i if i»ary A p p i r c a n o r i
I M C O w E N -
Cone A
I M C C t N -S U P ' . E M E Coi - : . B
' M T O K E N -• K
O i l ' a /e
DC-5<
i F - 1 0 0
- -vary cmub . l i e r and KaJx luc r loe u t l -baat : f i l i . ng ' i i i u j .
Impan> pets, comr iou ics l o viscosif. for weight tus pension, and p r o t aoaa f-.itrai.on con t ro l
Ge l l ing agent f o r f o r m u l a i i a g feajbj gcl lat io W. | P « t »
C< -.1 r ibutet 10 ih n o i ropic p roper tea and '-.ducts thermal conduct iv i ty m H i -Temp K.cn-Pak
NOTES
184
PLAN OF EXPLORATION
WEST CAMERON BLOCK *7?
OCS G 7626
INFORMATION A..0 CALCULATIONS ON
AIR 0 JALITY
AS REQUIRED BY
30 CFR 2 .5 7
INFQr>lATICN 6 CALCL'LATICMS
AIR 'JuMJTY
WEST OWERCIi BLOCK 477
The diotarce to i fn i i Cameron Block 477 froo the closest onshore area of a state is approximately 84 miles. The center of West Cameron tilock <77 iy evpproximately 28 32' north and lct\g*;-ude 93 17' west. The c* ;••*>»/- ccishore area of a state is the monunent 'Man" along the coastline or Holly Beach, Louisiana at approximately latitude 29 46' north and longitude 93 19' west. This distui.ee produces exemption amounts of 2,797 tons/year for particulates, sulphur dioxide, nitrogen oxides anu voluL.'JLe organic c xopounds and 65,193 tons/year for carbon monoxide.
Projflctad LfriBBiflM
The two proposed wells i n the Plan of Exploration is as follows:
Bella rrnjXMrfti Hpflfliirpr. Dppth
Block 477 Wall A 9,000' Block 477 SfcU B 3.000'
TOTAL FEET DRITJfP 12,000'
Assuming 60 horsepowet hours required to d r i l l one . o o t ( 1 ) on an offshore o i l and gas dr.uiing r i g , this plan w i l l require 720,000 horseprw aoiirs to complete. Using the emission factors for diesel-powered industrial ecuipmant from Table 3.3.3-1 of LPA publication AP-42, Gccspilation of Air Pollutant Ftnission Factors, exB.'
tcted emissions are as follows:
Pollutant Torn! T T O
Carbon Monoxide 0.24 Nitrogen Oxides 1.11 Uvdrccarbon i 0.09 Sulphur Die _5e 0.07 Particulate*. 0.08
Bnissions due to support boats and helicopters are tabulated below: (2)
Pollutant: Tptfll Tons Carbon Monoxide 37.05 Nitrogen Oxides 10.41 Hydrocarbons 2.21 Sul^jhur Dioxide 0.68 Particulates 0.74
Page 2
Gcobining the anticipated emissions from the preceding tables yields the following total emissions expected from this plan:
Pollutant Total Tona
Carbon Monoxide Nitrogen Oxides Hydrocarbons Sulphur Dioxide Particulates
37.29 11.52 2.30 0.75 0.82
Since none of these amounts approach 2,797 tons (65,193 tons for carbon monoxide), we rsquest that you determine under Section 250.57(d) that the Plan of Exploration for West Cameron Block 477 be exempt from further air quality review.
PL/nl 11/25/85
(1) Atavospheric emissions from offshore o i l and gas development and production (EPA-450/3-77-206, June 1977).
(2) See attached detailed emission calculations.
DETAILED EMISSION CAIAXIATIONS FOR SUPPORT
BOATS AND HELICOPTERS
rrpy nonr Powered by three 12V-71N General Motors diesel engines.
Emissions for one General Motors 12 v-7 IN engine:
Fuel Consumption = 0.385 lb/GHP/HR Horsepower • 340 Diesel =7.3 lb/gal Consumption = 385 U40? a 1 7 < 9 3 gai/hr
Conversion Factor - X " » g * » 7 5 - 0.0589 " j ^ f ^
Frequency of use - 4.5 hours per t r i p , 5 t r ips per month- .031 yrs
"VitWYr f Fill I Tim*. Tons/Yr 1 Engine 2_JEngines (iVTiiiil)
Carbon Monoxide - 102 lb/1000 gal X 0.0589 Nitrogen Oxides - 469 lb/1000 gal X 0.0589 Hydrocarbons • 37.5 Jb/1000 gal X 0.5089 Sulphur Dioxide 31.2 lb/1000 gal X 0.0589 Particulates 33.5 lb/1000 gal X 0.0589
(Factors from AP-42 Table 3.3.3-1)
Mack Boat
Powered by two D 398 Caterpillar engines
Emissions for one D 398 Caterpillar engine:
Fuel Consumption = 45 gal/hr
Conversion Factor - £ 5 X » » » » •» - 0.148 W g g * * *
Frequency of use - 9 hours per tri p , 4 trips per month • 0.05 yrs
6.01 .8.03 0.56 27.62 92.86 2.57
2.21 6.63 0.21 l . P i 5.52 0.17 1.97 L.91 0.18
DETAILED EMISSION CALCULATIONS FCR SUPPORT BOATS AND HELICOPTERS Page 2
Tnnfi/Yr fFl i l 1 Tim*. Tons/Yr 1 Bngtai 3 Snsii.es actual I
Carbon Monoxide • Nitrogen Oxides • Hvdrocarbons -Sulphur Dioxide Particulates
(Factors from AP-42 Table 3.3.3-1)
102 lb/1000 gal X 0.148 = 15.10 30.20 1.51 469 lb/1000 gal X 0.148 » 69.41 138.82 6.94 37.5 lb/1000 gal X 0.148 = 5.55 16.65 0.83 31.2 lb/1000 gal X 0.148 — 4.62 9.24 0.46 33.5 lb/1000 gal X 0.148 4.96 9.92 0.50
Helicopters
Fuel Usage - 45 gal/hr (gasoline)
Frequency of use - 1 hour per trip , 10 trips per week
0.148 Conversion Factor • IQQQ X
2000
Tons/Yr (Full Tim?
Tons/Yr CActUfll)
3940 lb/1000 gal X 0.148 = 533 34.98 102 lb/1000 gal X 0.148 « 15.01 0.90 132 lb/1000 gal X 0.148 * 19.54 1.17 5.31 lb/1000 gal X 0.148 * 0.79 0.05 6.47 lb/1000 gal X 0.148 = 0.96 0.06
Carbon Monoxide Nitrogen Oxides Hydrocarbons Sulphur Dioxide Particulates
(Factors from AP-42 Table 3.3.3-1)
Total emissions due to support boats and helicopters during the Plan of Exploration:
Pollutant
Carbon Monoxide - 0.56 + 1.51 + 34.98 - 37.05 Nitrogen Oxides - 2.57 + 6.94 + 0.90 • 10.41 Hydrocarbons - 0.21 + 0.83 + 1.17 - 2.21 Sulphur Dioxide - 0.17 + 0.46 t 0.05 = 0.68 Particulates • 0.18 + 0.50 + 0.06 - 0.74
ENVIRONMENTAL REPORT
FOR COASTAL MANAGEMENT CONSISTENCY DETERMINATION
PLAN OF EXPLORATION
6ULF OF MEXICO
FOR
WEST CAMERON AREA BLOCK 477 (OCS-G-7626)
SUBMITTED TO: PAUL LANGFORD
COORDINATOR OF REGULATORY AFFAIRS 16801 GREENbPGINT PARK DRIVE
HOUSTON. TEXAS 77060 (713/999-0858)
NOVEMBER 22, 1985
Prepared by: JOHN E. CHANCE & ASSOCIATES, INC.
Regulatory a Environmental Division Project #85-8302
i->V- C, Chance £ Aaaec^ Ino,
Taole of Contents
ENVIRONMENTAL REPORT
Page
I . T i t l e Page 1
Table of Contents 11
List of Figures Iv
L ist of Tables v
I I . Description of the Proposed Action i
A. Travel Modes, Routes, and Frequencies 3
B. Support Base and New Personnel 3
C. New Support Fac i l i t i es 4
D. New or Unusual Technology 4
E. Location of the Proposed Ac t i v i t i es 4
I I I . Description of the Affected Environment and Impacts 6
A. Physical and Environnental 6
1. Conmercial Fishing 6
2. Shipping 11
3. Recreation 14
4. Cul tural Resources 15
5. Ecological ly Sensitive Features 15
6. Exist ing Pipelines and Cables 16
7. Other Mineral Uses 16
11
8. Ocean Duaplng 16
9. Endangered or Threatened Species 17
B. Socio-Economic Iapacts 18
IV. Unavoidable Adverse Iapacts 19
V. Literature Cited 23
Coastal Zone Consistency Certification 25
John E. Chance £ Aaeoc^ Inc. i i i
LIST OF FIGURES
FIGURE Page
1---Vicinity Map of West Caaeron Area Block 477 2
'ohm E. Chanco & Assoc* Inc. iv
LIST OF TABLES
TABLE Page
1— CoatMrclally Important Shellfish of the
Gulf of Mexico 9
2— Check List xeeerclal & Sport Fishes
of The Northern Gulf of Mexico 12
John E. Chanca £ Assoc., Ina. v
I I . Oescr'~tion of the Proposed Action
This report addresses the exploration ac t i v i t y proposed by Anadarko
Petroleun Corapany for West Cameron Area Block 477 (OCS-G-7626). Trie
approximate locat ion of the ac t i v i t y s i t e 1s presented 1n Figure 1, ,<h1ch Is
a v i c in i t y map of tne Outer Continental Shelf (OCS) lease areas off the
coast of Louisiana.
I t 1s ant ic ipated that a Jack-up d r i l l i n g r i g w i l l be moved on location
and a total of two wells w*l" d r i l l e d . The surface locatior. or the
proposed wells and addit ional Information regarding the specif ic a c t i v i t i e s
proposed by Anadarko Pe.. o' :ua Company for th is block are Induced 1n the
attached Plan of Exploration.
The proposed a c t i v i t i e s w i l l be carr ied out by Anadarko Petroleum
Company with a guarantee of the fo l lowing:
1. The best available and safest technologies w i l l be u t i l i z e d
throughout the project. This includes meeting a l l applicable
requirements for equipmeit types, general project layout, safety
systems, equipment and nonitoring systems.
2. All operations w i l l be covered by M.M.S. approved 011 Spi l l
Contingency Plan.
3. All applicable Federal, State, and local requirements regarding
a i r emissions, water qua l i t y , and discharge for the proposed
a c t i v i t i e s , as well as any other pe.mit condit ions, w i l l be
John E. Chance 4 Assoc* Inc.
TEXAS
CAST BREAK!
• R C *
CAROL* B A N K S AREA ORCCN CANTON ARCA
MOBILE SOUTH
VICINITY MAP
40 IKM
JOHN E CHANCE tt ASSOC., INC.
conplied w i t h .
A. Travel Modes, Routes, and Frequencies
Anadarko Petroleun Conpany w i l l operate out of the i r service base
f a c i l i t i e s established In Intracoastal City* Louisiana. Anadarko Petroleun
Conpany anticipates using one hel icopter, one supply boat, and one crew boat
to support the West Caneron Area Block 477 a c t i v i t y . The hel icopter w i l l
travel to the locat ion a tota l of ten t ines per week. The crew boat w i l l
'.ravel to the locat ion a to ta l of f ive t ines per month and the supply boat
w i l l travel to the locat ion a tota l of four t ines per month.
I t 1s ant ic ipated that the transportation vessels w ' l l u t i l i z e the nost
d i rect route f ron the Intracoastal Ci ty . Louisiana base. Because a vessel
supporting the West Cameron Area Block 477 exploration ac t i v i t i e s nay be
scheduled for other stops in the area, the exact route for each vessel on
each part icular t r i p cannot be predetermined.
B. Support Base and New Personnel
Anadarko Petroleun Conpany w i l l u t i l i z e support base f a c i l i t i e s
established In Intracoastal C i t y . Louisiana. The Intracoastal C i t y .
Louisiana support base Is located approxinately one hundred twelve n i les
from the block.
John C Chance & Assoc., Inc.
3
Because hel icopter and marine f a c i l i t i e s are current ly available at the
service base and are presently and continuously manned, no additional
onshore employment Is expected to be generated as a resul t of these
a c t i v i t i e s .
The I n i t i a l OCS Socio-Economic Data Base Report for the service base
f a c i l i t i e s u t i l i z e d by Anadarko Petroleum Company w i l l be prepared for
submission pursuant to the speci f ic parameters to be establishes oy the
DOI/MMS and scheduled to be Issued at a l a te r date.
C. ><ew Support Fac i l i t i e s
The proposed explorat ion a c t i v i t i e s for West Cameron Area Block 477
w i l l not require the development of any new support f a c i l i t i e s .
D. New or Unusual Technology
The exploration a c t i v i t i e s for West Cameron Area Block 477 w i l l not
warrant u t i l i z i n g any new technology that may a f fec t coastal waters.
E. Location of the Proposed Ac t i v i t i es
West Cameron Area Block 477 Is located approximately one hundred twelve
miles from the Intracoastal C i t / * Louisiana support base and e> ;r,ty-seven
miles from the Louisiana coast of Cameron Parish. Figure 1 presents the
location of the block In re la t ion to the Louisiana coast, as .e l l as the
John E. Chance A Assoc., ino. 4
geogri-hlc relationship between West Caaeron Area Block 477 and the other
OCS least areas.
John E. Chance & Assoc., Inc.
I I I . DESCRIPTION OF THE AFFECTED ENVIRONMENT AND IMPACTS
A. Physical and Environmental
1. Commercial Fishing
Commercial fishing has traditionally provided an important economic
base for a majority of the coastal communities along the Gulf of Mexico. In
1962, the Gulf coastal states landed 2.3 billion pounds of fish products
representing a third of the nation's total, valued at over 600 million
dollars, the five commercial fisheries of the greatest economic Importance
are the shrimp, menhaden, oyster. Industrial bottom fish, and crab
fisheries.
In 1982, Gulf fishermen landed over 209.9 million pounds of shrimp
representing 75 percent of the nation's total and valued at over 425 million
dollars. The northem Gulf shrimp fishery 1s comprised mai.ily of three
species; the brown shrimp (Penaeus azteeus) , the white shrimp (P^
setiferus) and the pink shrimp (P. duorarum). The smaller brown shrimp
represent approximately 60 percent of the shrimp taken, the pink shrimp 10
percent, and the white shrimp account for a majority of the remainder.
Three other species, the rock shrimp, royal reds, and the seabobs, are also
taken commercially in the northern Gulf but together comprise less than 4
percent of the total shrimp landings.
John kZ Chance mt Amaoo* Inc. 6
Preliminary s ta t i s t i c s compiled by the National Marine Fisheries
Service Indicate that 76,953,758 pounds of shrimp (heads on) valued at over
130 mi l l ion dol lars were landed at Louisiana ports In 1963. I t should be
noted that catch s t a t i s t i c s are recorded by the area landed and do not
necessarily indicate that the species were actual ly caught in waters
adjacent to the ports where they were landed.
Most shrimp are taken by trawl and are estuarine dependent In that they
require estuaries during some stage of t he i r l i f e cycles. Mature shrimp
leave the estuary fo r the open Gulf where they spawn (release eggs). The
eggs and subsequent larval stages c i rcu la te f reely In the currents of the
X S and can be found in v i r t u a l l y a l l OCS waters. Young juveni les then
enter the estuary to feed, mature, and repeat the cycle.
The proposed petroleum ac t i v i t i es In West Cameron Area Block 477 are
expected to have no Impact on the harvest of brown or white shrimp since
West Cameron Area Block 477 Is beyond the outer l i m i t s of the narvest area
fo r these species. (U.S.O.I . FREIS, Gulf of Mexico 1963 Visual No. 4-1.)
Th" Gulf oyster f ishery provide' over 40 percent of the oysters lanced
nat ional ly In 1962 to ta l ing 24.1 mi l l ion pounds of meat worth over 33
mi U i o , do l lars . Most Gulf oysters are taken by oyster dredging 1n
estuarine and coastal waters within 5 miles of shore. Accorcing to National
Marine Fisheries Service s ta t i s t i cs over 13 m i l l i on pounds of oysters valued
a t over 17 mi l l ion do l lars were landed at Louisiana ports in 1983. The
John tu Chance et Assoc., ino, 7
proposed activit ies In West Caaeron Area Block 477 are not expected to nave
any Iapact on the oyster fishery In Louisiana.
In 1981 the Gulf States also landed 37.4 Mill ion pounds of blue crabs
(Callinectes sapidus) valued at over 8 Mill ion dollars. Nost were captured
In "pots" (baited traps) In shallow estuarine or near shore waters. Blue
crabs are also caught using "trotl Ines" (shallow, ault1baited lines) and
bottoa trawls. These crabs are estuarine dependent with planktonic eggs and
larval stages. Blue crab landings at Louisiana ports totaled over 18
a l l l l on pounds valued at over 16 Million dollars 1n 1983, according to
National Marine Fisheries Service Statist ics. The fishery for blue crabs Is
unlikely to be significantly affected by exploration and production
act iv i t ies In these blocks as I t is offshore of the coastal and estuarine
waters In which this fishery operates.
Table 1 presents a l i s t of coanerclally important shellfish found in
the northern Gulf of Mexico.
The nenhaden or "Pogy" fishery Is the nation's second aost valuable
fishery accounting for 1.2 b i l l ion pounds valued at 47 a l l l lon dollars or
roughly half of the total 1981 f ish poundage landed In the U. S. Spurred by
a 55 percent Increase 1n nenhaden landings froa tht Gulf coast states, tht
U. S. had a record setting nenhaden catch In 1982. Gulf landings were 1.9
b i l l ion pounds worth over 72 a l l l l on dollars. Four species are said to
coaprlse the nenhaden fishery but the Gulf menhaden (Brevoortia patronus)
accounts for aost of the catch. Menhaden are processed Into f ish aeal, fish
%3ohn C Chance at Ameoc* hw, 8
r TABLE 1
COMMERCIALLY IMPORTANT SHELLFISH OF THE GULF OF MEXICO
COMMON NAME SCIENTIFIC NAME HARVEST METHOD
SHRIMP:
Brown Sirimp Penaeus azteeus BT
White Shriap P. setiferus BT
Pink Shriap P. duorarue BT
Seabob XIphopenaeus kroyeri BT
Royal Red Shriap Hyaenopenaeus robustus BT
RocJc Shrlan Slcyonla brevlrostrls BT
Blue Crab Callinectes sapidus CT.BT.TL
Oysters Crassostrea sp. 00,OT
BT Bottoa Trawl
CT Baited Crab Trap
00 Oyster Dredge
OT Oyster Tongs
TL "TrotlIne"
John E. Chance & Ameoc* Inc.
9
o i l , and f i sh solubles for indust r ia l use. Menhaden are estuarine dependent
with planktonic eggs. West Cameron Area Block 477 l i e s beyond the
"Principal Menhaden Harvest Area" (U .S .D. I . , FREIS, Gulf of Mexico, 1983,
Visual No. 4 -1 ) , however, the poss ib i l i t y of negative impacts on menhaden
f i shiny do not e x i s t .
Industr ial bottom fishes make up a large f ishery in the Gulf . Within
th is group are f ishes taken on or very near the bottom by commercial
trawlers. The fo l lowing fishes generally account for 95 to 98 percent of
the Industr ial bottomflsh trawl f i shery : croaker, spot, sand seatrout,
s i lver seatrout, c a t f l ' - io» jspine porgy (U.S.D. I . , 1983).
Many of the r i in the Inci te bottomflsh category spawn
In offshore waters, and v . is possible that we eggs might be adversely
affected by contact wi th d r i l l cut t ings and/or d r i l l i n g mud I f they were
present near the r i g during such releases. These discharges may also cause
temporary re locat ion of adults due to Inundation of feeding ground at the
d r i l l s i t e . Fishing ac t i v i t y w i l l be temporarily Interrupted by the
placement of the d r i l l i n g r ig but no long-term effects are anticipated as a
result of th fs proposal. Industr ial bottomflsh are usually sold as
Indus "ishmeal and f i sh solubles, but th is group also produces some
foodfi food, and FPC ( f i sh protein concentrate).
Other species fo r which s ign i f i can t commercial f isher ies ex is t Include
striped mul le t , groupers, snappers, and f lounders. Mullet are taken near
shore and in estuarine waters in seine nets , g i l l nets, and cast r e t s .
John E. Chance £ Assoc* inc. 10
Snappers and groupers are taken by hook and 1 Ine throughout the OCS wherever
natural ly occurring or man-made benthic features provide su f f i c ien t habi tat .
Flounoers a-e also caught commercially by hook and l i ne and are taken
seasonally in very s h a l l . * tstuar lne water by gig (Di.:bless spear).
Weakflshes, croakers, and drums are also taken commercially by hook and l i ne
as foodflshes. Table 2 presents a l i s t of commercially Important Industr ia l
nottomfishes and sport f ishes found In the Gulf of Mexico.
Overal l , commercial fishermen have benefited from the growth of the
petroleum Industry In the OCS water of the Gulf of Mexico. While
technological improvements have enabled commercial fishermen to increase the
volume of landings, development of the petroleum industry has also had a
posit ive Impac y. f i sh ing . Because X S petroleum development 1s dependent
on extensive marine vessel u t i l i z a t i o n , harbors and po- ts have been
Improved, port access waterways have been expanded and Improved, arid the
ava i lab i l i t y and qua l i ty of marine vessel maintenance and repair f a c i l i t i e s
have Increased s i g n i f i c a n t l y . These Improvements have de f in i te ly had a
posit ive ef fect fi fishermen ( L a s s l ^ r , 1980).
2. Shipping
A designated shipping fairway 1s located approximalely two miles south
of West Cameron Area Block 477. Another shipping fairway Is located
approximately ten miles north of the c lock. I t Is l i ke l y that the marine
vessels w i l l u t i l i z e the shipping fa i * * * * / located north of the block to gain
access the support base, however I t Is un l ike ly that they w i l l have any
John E. Chance & Assoc* Inc. n
TABLE 2
A CHECK LIST OF COMMERCIAL 4 SPORT FISHES
OF THE NORTHERN GULF OF MEXICO1
COMMON NAM? SCIENTIFIC NAME2
Gulf Menheden Brevoortia patronus
Hardhead Catfish Arlus f e l l s
Gafftopsall Catf ish Bagre marlnus
Warsaw Grouper Epinephelus n igr i tus
Jewfish Epinephelus I ta ja ra
Red Grouper Epinephelus morio
Rock Hind Epinephelus adscenslonls
Florida Pompano Trachlnotus carolInus
Red Snapper Lutjanus eampeehanus
Sheepshead Archosargus probatocephal us
Northern Kingfish Menticirrhus saxa t l l l s
Black Drum Pogonla: :roais
Atlant ic Croaker Micro, jgonllS undulati.s
Spotted Seatrout Cy nose lor. nebuiusus
Sand Seatrout Cynoscion arenarlus
Red Drue Sciaenops ocellatus
Snot Leiostomus xanthurus
Striped Mullet Mugil cephalus
King Mackerel Seomberomorus cavalla
John E. Chance & Assoc., Inc. 12
TABLE 2 (cont 'd)
A CHECK LIST OF COMMERCIAL 4 SPORT FISHES
OF THE NORTHERN GULF OF MEXICO
Spanish Mackerel Sccmberomorus maeulatus
Unclassif ied Flounders Paral ichthys spp.
1 . Based on landing s ta t i s t i c s compiled by the National Marine
Fisheries Service, New Orleans, Louisiana.
2. Scient i f ic nomenclature from American Fisheries Society (1980)
John E. Chance £ Assoc., Inc. 13
e f f e c t on fairway t r a f f i c . Hie d r i l l i n g r i g and each of tne marine vessels
w i l l be equipped with a l l U. S. Coast Guard required navigational safety
a ids .
3. Recreation
The open Gulf encompasses a broad expanse of saltwater which i s
u t i l i z e d by numerous sports fishermen and a small but rapidly Increasing
number of SCUBA divers. Many fishermen charter boats to deep-sea f i sh and
sport dive In the northern Gulf. The states of Alabama, Miss iss ippi , and
Louisiana support approximately 120 charter boats which conduct a majority
of the i r f ishing a c t i v i t i e s in the waters of the OCS (U.S.O. I . , 1983).
Petroleum platforms in the northern Gulf provide recreation for fishermen
and scuba divers because they act as a r t i f i c i a l reefs a t t ract ing and
establishing aquatic communities Including highly sought a f ter food and
sport f ishes. The reef e f fec t created by petroleum p' l t forms 1s well known
and 1s evidenced by tne numerous pr ivate boat owners who regularly v i s i t
offshore f a c i l i t i e s to harvest food and sport f ishes.
Frequently, offshore r igs and platforms serve as svlgation points for
small commercial and recreational marine c r a f t . Manned d r i l l i n g r igs and
platforms can also provide a haven for small c r a f t operators forced to
abandon the i r vessels during storms or following boat accidents. The
Ins ta l la t ion and use of navigational a ids , l i fesaving equipment, and other
safety requirements pursuant to Coast Guard regulations are standard
procedure for i r i 11 ing r igs and marine vessels u t i l i z e d by Anadarko
John C Chance tt Assoc* Inc. 14
Petroleua Company.
4. Cultural Resources
Visual No. 11 from the Regional Environmental Iapact Statement
(U.S.O.I, 1963) Indicates that West Cameron Area Block 477 f a l l s within the
zones designated as areas with high probabi l i t ies of h is tor ica l and
prerrstor lcal cu l tu ra l resources. An archeological assessment was performed
for the block. This report indicates that there w i l l be no s ign i f icant
Impacts upon c u l t u r a l l y s ign i f icant features.
5. Ecologically Sensitive Features
West Cameron Area Block 477 Is located approximately twenty-nine miles
from Fanthom Bank and f i f t y miles from Coffee Lump. There are no other
known ecological ly sensit ive areas near West Cameron Area Block 477.
The Intracoastal C i t y . Louisiana support base 1s located approximately
seventeen miles from Harsh Island (U.S.D.I . FREIS, Gulf of Mexico, 1983a,
Visual No. 3) .
In general I f a l l a c t i v i t i e s are executed as planneo, encountering no
unusual circumstances, the environmentally sensit ive areas w i l l not be
af fected.
John £. Chance & Assoc., Inc. 15
6. Existing Pipelines and Cables
A shallow hazards survey was performed fo r Anadarko Petroleum Company
by John E. Chance and Associates, Inc. This report indicates that acoustic
void zones at depths of 45 to 82 feet below the seafloor were present within
the block. Although shear strength values may be decreased within these
areas, the low pressure gas deposits should not s ign i f i cant ly I n f l u e ^ e
d r i l l i n g operations 1n the v i c i n i t y . Mo Indications of M*h e s v i n gas
accumulations were noted during the survey. A fault, waj U-..H ..• the
north-central port ion of the lease. Anadarko Pf* •'• 1/7 aware of
the potential hazards and has taken the necessary prec ,mry measures.
There are two known pipelines located wlihft , the block. The exact
location of these pipel ines are depleted In the Shallow Hazards Report.
7. Other Mineral Uses
There are no other known mineral resources located 1n or near West
Cameron Area Block 477.
8. Ocean Dumping
The major sources of ocean dumping related to OCS petroleum exploration
ac t i v i t y are d r i l l i n g f l u i d s , or "muds," and d r i l l cu t t ings. Anadarko
Petroleum Company does ant ic ipate dumping the i r excess water based d r i l l i n g
John E. Chance £ Assoc., Inc. 16
f l u i d s (approximately 1200 b b l s ) . I f any ; | - O i s e d a i s used :. •-•"ny the
d r i l l i n g operations, 1t w i l l be returned r tne vendor r j r proper disposal
at an approved s i t e .
D r i l l cut t ings . *e brouyht up by the d r i l l i n g mud in range in size from
grains of sand to peb)1es. The cutt ings are separated and s i f ted and then
disposed overboard. Treated a st lc wastes and d r i l l waters w i l l also be
disposed at the proposed d r i l l i n g s i t e . There w i l l be no intentional
discharge of any o i l y or hazardous materials 1n v io la t ion of DOI or EPA
regulat ions.
West Cameron Area Block 477 Is not loca tea wi th in an approved E.P.A.
disposal area or m i l i t a r y ordinance disposal area.
9. Endangered or Threatened Species
Endangered or threatened species which might occur In West Cameron Area
Block 477 are blue whale (Balaenoptera musculus). finback whale
(Balaenoptera physalus), humpback whale (Megaptera novaeangllae), sei whale
(Balaenoptera bo rea l i s ) , sperm whale (Physeter catodon), Kemp's r id ley
t u r t l e (Lepidochelys kempii) . green t u r t l e (Chelonia mydas). hawksbill
t u r t l e (Eretmochelys Imbricata). leatherback t u r t l e (Dermochelys coriacea)
and loggerhead t u r t l e (Caretta caret ta) (U .S .D . I . , Region IV Endangered
Species Notebook).
Endangered and threatened species expected to occur In the v i c i n i t y of
V John £ Chance 6 Assoc* Inc. 17
the onshore base are bald eagle (Haliaeetus leucocephalus), the brown
pelican (Pel ec anus occidentalis), and American all igator (Alligator
•Isslsslpplensls)(U.S.D.I., Region IV Endangered Species Notebook). The
brown pelican was a coaaon resident of Louisiana but this species became
virtual ly extinct In the late 1950's (Frit ts et a l . , 1983). By 1960, the
estlaated Louisiana population of brown pelicans was four birds (NFUL,
1980). Re-establlshaent of a breeding population in Louisiana has aet with
varying success (Fr i t ts et a l . , 1983). The act iv i t ies proposed by Anadarko
Petroleua Coapany are expected to have no Impacts on the brown pelican. The
American all igator Is classified as threatened In Louisiana due to
similarity of appearance. This species Is neither endangered nor threatened
biologically in Louisiana and a regulated harvest Is permitted under State
law (U.S.D.I., Region IV Endangered Species Notebook). No Impacts on
American alligators are expected. The presence of marine mammals 1n coastal
Louisiana Is considered sporadic and probably no resident populations exist.
I t Is unlikely that onshore or exploration act ivi t ies related to West
Cameron Area Block 477 wi l l have any effect on the previously named species.
B. Socio-Economic Impacts
In accordance with DOI/MMS guidelines (OS-7-01), dated November 20,
1980, the In i t ia l OCS Data Base Report wi l l be developed for submission on
or before the prescribed due date. Subsequent Environmental Reports
provided by Anadarko Petroleum Company wi l l address this data and related
activity Impacts as required.
John £*. Chance & Assoc., tna. 18
IV. UNAVOIDABLE ADVERSE IMPACTS
The greatest threat to the natural environment Is caused by Inadequate
operational safeguards that aay cause nr contribute to an o i l spi l l or well
blowout. These accidents can be greatly reduced In nuaber by ut i l iz ing
trained operational personnel and employing a l l available safety and
pollution control systems. These aeasures are standard operating procedure
for Anadarko Petroleum Coapany. Anadarko Petroleum Coapany has an approved
011 Spill Contingency Plan.
I t should be noted that most large crude o i l and refined products
spi l ls have occurred during transportation and not during dr i l l ing or
production operations. Furthermore, the probability of an o i l sp i l l
occurring during exploration dr i l l ing operations 1s low (Danenberger, 1976).
Transportation and river runoff contribute an estlaated 34.9 percent and
26.2 percent, respectively, to the hydrocarbon contamination of the world's
oceans while offshore production activi t ies account for only 1.3 percent
(National Academy of Sciences, 1975). Natural seeps of petroleum and
natural gas, which occur throughout the northern Gulf of Mexico (Zo Bell,
1954; Geyer, 1979), contribute an estimated 9.3 percent to the contamination
of the world's oceans (National Academy of Sciences, 1975). Additionally,
i t was noted In the executive summary of a recent study of petroleum
production platforms In the central Gulf of Mexico (Bedlnger, 1981), that
natural disturbances ( I .e . river flooding and storms) can acre greatly
affect normal biological communities that the current Industrial development
of the Louisiana OCS. The preceding discussion Is not Intended to minimize
John £ Chance at Ammoo* Ino. 19
the significance of major o i l sp i l l s result ing from petroleum exploration
and production a c t i v i t i e s but i s provided to establ ish a perspective
re la t ive to the i r probable occurrence.
Thirteen cf the f o r t y - s i x blow-outs on the OCS between 1971 and 1978
were associated with exploration d r i l l i n g a c t i v i t i e s , none of which released
any o i l to the marine environment (Danenberger, 1980). The IXTOC I s p i l l of
1979, however, demonstrates that advanced d r i l l i n g technology and available
safety and pol lu t ion control systems are not I n f a l l i b l e . r***t s p i l l s are
subjected to Immediate containment and cleanup e f f o r t s . The ult imate fate
of o i l spi l led in the marine environment is generally considered to be one
or a combination of tne fo l lowing: evaporation and decomposition In the
atmosphere, dispersal In the water column, Incorporation Into sediments, and
oxidation by chemical or biological means (National Academy of Sciences,
1975).
The unavoidable adverse Impacts that w i l l occur as a resu l t of the
exploration d r i l l i n g and discharging of d r i l l i n g f lu ids and treated sewage
w i l l be few 1n number and temporary In nature. The primary adverse Impacts
Include a localized degradation of water and a i r qual i ty In the v i c i n i t y of
the d r i l l i n g s i t e , the potential obstruction to commercial and recreational
f i sh ing vassels, and the disruption and/or k i l l i n g of benthic and/or pelagic
organisms during locat ion of the d r i l l i n g r i g and during disposal of muds,
c u t t i n g s , and domestic wastes and sewage.
John C Chance & Assoc., htc. 20
Discharging froa the d r i l l s i te Is Inevi table during OCS operations,
par t i cu la r ly during explorat ion. Any materials that aay contain o i l or
other hazardous mater ia ls, and therefore would have a auch gre ite." adverse
Iapact on the environment, w i l l not oe discharged in ten t i c . i i y . Any
discharging w i l l be done pursuant to a l l DOI and EPA regulat ions. The
discharges to be disposed overboard as a resu l t of the exploration ac t i v i t y
w i l l Include domestic waste and sewage that i s treated on the r ig before
discharging and d r i l l cu t t ings .
The environmental fate and ef fects of d r i l l i n g auds and cutt ings has
been extensively addressed In a recent syaoslua (See Ayes et a l . , 1980 for
deta i led discussions). The discharging of d r i l l cutt ings and water-based
aud w i l l resul t In an Increase In water t u r b i d i t y , burial of benthic
organisas, and possible toxic ef fects on marine organisms 1n the immediate
v i c i n i t y of the d r i l l i n g r i g . A reduction In photosynthetlc ac t i v i t y and
plankton populations can also be expected as a resu l t of discharging. I t Is
expected, however, that pelagic and benthic organisms w i l l repopulate the
area rapidly a f te r discharging I f the e f fec ts are minimal and Intermit tent
as expected.
Offshore a c t i v i t i e s generate a small but s ign i f i can t amount of a i r
po l lu tants ; therefore, the deter iorat ion of a i r qual i ty 1s unavoidable In an
OCS operation area. In most Instances, these emissions a f fec t only the
Immediate exploration ac t i v i t y s i te and are rapidly dissipated by the
atmosphere depending upon cl imat ic condit ions. An Air Quality Review Report
has been performed for West Cameron Area Block 477 and Is Included as an
J o h n £ C h a n c e «f A s s o c . , I n c .
21
attachment to t h i s Environmental Report.
Commercial and recreational f ish ing would be affected by OCS
' development, but pr imar i ly In terms of Inconvenience and Interference. i
l Although the unavoidable adverse Impacts could Include some smothering of
| she l l f i sh , snagging of trawl nets, reduction of area presently used fur
unrestr icted f i s h i n g , and minimal f i n f i s h k i l l i n g , commercial f ishing
ac t i v i t i e s would not be s ign i f i can t ly e f fec ted, except In the unl ikely event
of an o i l s p i l l . An o i l s p i l l could resu l t In serious economic losses due
to the contamination of commercial f i sh species.
There Is a remote poss ib i l i t y that offshore areas of h i s t o r i c a l ,
c u l t u r a l , or b io logical signif icance could be damag et or destroyed by XS
exploration operations. Visual No. 11 from the Regional Environmental
Impact Statement (U.S.O. I . , 1983) Indicates that no archeological, c u l t u r a l ,
or h is tor ic areas are in the v i c i n i t y of West Cameron Area Block 477.
Anadarxo Petroleum Company w i l l make every e f f o r t to avoid disturbing any
h i s t o r i c a l l y , c u l t u r a l l y , or b io log ica l ly s ign i f i can t feature.
John £ Chance £ Assoc., too. 22
LITERATURE CITED
American Fisheries Society 1980 A L is t of Common and Sc ient i f i c Names of Fishes from the United
States and Canada (Fourth Edi t ion) . Special Publication No. 12. Betnesda, Maryland. 174 pp.
Ayers, R. C , N. L. Richards and J . R. Gould 1980 Proceedings of a symposium. Research on environmental r>te
and ef fects of d r i l l i n g f l u ids and cut t ings . Washington, D.C. 1,122 pp.
Bedlncer, C. A., J r . i i l Ecological investigations of pet.-o;?ura production pl? tfo»ir*s *n
the central Gulf of Mexico. Voiune I I I : Executive unrary. Submitted to the Bureau of Lan- ^nagemer New OrVi^Jis, Louisiana. Contract No. AA551-CT8-17. 29 pp.
Danenberger, E. P. . 1976 Oil s p i l l s , 1971 - H'75, C I f of Mexico * i t e r r -nt i . 5 Shelf.
Geological Survey d r c u l d ' /4... 47 pp
Danenberger, E. P. 1980 Outer Continental Shelf Oil and to* . s ju ts . L ' .vt i .S. Opsn-Flle
Report. 80-101. 15pp.
F r i t t s , T. H., A. B. I rv ine , R. D. Jennings, L. A. Col lum, W. Hoffrjan, and M. A. McGehee
1983 Tur t les , b i rds , and mammals in the northern Gulf of Mexico and nearby At lant ic waters. U. S. F1sh and Wi ld l i fe Service, Division of Biological Services, Washington, D. C- FWS/0BS-82/u5. 4b5 pp.
Gallaway, 8. J . 1981 An ecosystem analysis of o i l and gas development on the Texas-
Louisiana continental she l f . U. S. F1sh and Wildl i f * Service, Off ice of Biological ^ r v l c e s , Washington, D. C. FWS/OBS-81/27. 89 pp.
Gallaway, B. J . and G. S. Lewbel 1982 The ecology of petroleum platfonns in the northwestern Gulf of Mexico:
a community p r o f i l e . U. S. Fish and Wi ld l i f e Service, Office of Biological Services, Washington, D. C. FWS/OBS-82/27. Bureau of Land Management, Gulf of Mexico OCS Regional Of f ice , Open-File Report 82-03. XIV +92 pp.
Gallaway, B. J . , L. R. Mart in, R. L. Howard, G. S. Boland, ind S. D. Dennis 1981 Effects on a r t i f i c i a l reef and demersal f i sh ar4 macrocrustacean
communities. Pages 237-293 In B. S. Mlddledi t ch , ed. Environmental e f fects of offshore o i l produ t ^n . The Burxaneer r,as and 011 Field Study. Marine Science, Vol, , Plenum Press, New iurk , New York.
V John E. Chance & Assoc* Inc. 23
Geyer, R. A. 1979 Naturally occurring hydrocarbon seeps 1n the Gulf of Mexico and
Caribbean Sea. College Station, Texas: Texas A I M University Press.
National Academy of Sciences i975 Petroleum 1n the marine environment. Washington, O.C 107 pp.
National Fish and Wildlife Laboratory (KFWL) 1980 Selected vertebrate endangered species of the seacoast of the
United States: Brown Pelican, eastern and California subspecies. U. S. Fish and Wildlife Service, Biological Services Program FWS/OBS- 80/01.40. 16 pp.
National Marine Fisheries Service 1984 Louisiana landing stat ist ics from personal communication with Lee
USIA, NMFS, New Orleans. La.
U. S. Department of the Interior. Fish and Wildlife Service 19/6 Endangered and threatened species of the southeastern United States.
Region IV, Atlanta, Georgia (periodically updated).
U. S. Department of the Interior, Minerals Management Service 1983 Final Regional Environmental Impact Statement, Gulf of Mexico.
Vol. 1. Prepared by Minerals Management Service, Gulf of Mexico X S Region, Metairie, Louisiana. 527 pp.
Zo Bel l , C E. 1954 Marine bacteria and fungi, Fisheries Bulletin 55 (89): 217 - 222.
John E. Chanco & Assoc., Inc. 24
APPENDIX 1
COASTAL ZONE MANAGEMENT
CONSISTENCY CERTIFICATE
John £ Chance 4 Ammoo* ino. 25
COASTAL ZONE MANAGEMENT
CONSISTENCY CERTIFICATION
EXPLORATION
Type of Plan
WEST CAMERON AREA BLOCK 477 (OCS-G-7626)
Area and Block
. The proposed a c t i v i t i e s described 1n detai l In the attached Plan of Exploration conply wi th Louisiana's approved Coastal Managenent progran and w i l l be conducted In a manner consistent with such Progran.
Arrangements have been made with the State Tines In Baton Rouge, Louisiana to publish a Public Notice of the Proposed ac t i v i t y no la ter than
ANADARKO PETROLEUM COMPANY
Lessee or Operator
Cert i fy ing Of f i c ia l
Oate
V J o h n £ C h a n c e & M B B O O ^ « I C . 26
