J

TO: 0KS-2-*

FRON: OS-7-1

Supplemental Plan of Exploration

Control No. .

•., . mmvNm fmjg v,-.... •••• 'fimwm * m r_ _ ^

MICR0H L M E 0

• i. Lease OCS-6 V V J i

TO l «

ARCO Oil and Gts Company South Louisiana Districl Post Office Box 51401. Oil C t n t t r Lafaytt ' t . Louisiana 7OS0S Telephone 311 264 4410

John L. Morgan Oltshora District Drilling Superintendent

March )2, 1981

Mr. D. W. Solanaa Araa Oil & Gaa Supervisor U.S. Geological Survey P.O. Box 7944 Matairla, LA 70010

jr. • Dear KT". *ux«nas:

Vith thia latter and tha accompanying documents, we ara submitting a Supple­mental Plan of Explbratlon for Viosca Knoll Block 863, OCS-G-4133. OS-7-1.

Should you require additional information, please "ontact aa at 318-264-4000.

Si- carely,

W. R. Worthington

District Drilling Engineer, Cffshore

SCL:/lew

MICROFILMED

jjm-«*B

ARCO OIL & GAS

SUPPLEMENTAL PLAN OF EXPLORATION VIOSCA KNOLL BLOCK 863

(OCS-G-4133) OS - 7 - i

TABLE OF CONTENTS

A. Discussion

B. Estimated Time Table

C. Vicinity Plata I . Public Information

D. Shallov Hazards Report (Proprietary) 1. Proposed Well Locations 2. Watar Depths 3. Structure Map

E. Geological Information (Proprietary) t. Interpretation Letter 2. arface and Boctom Hole Location Maps 3. Structure Map

F. Onshore Support Facility

G. Oil Spill Contingency

9. Drilling Mu<* Information

I . Rig Description

J. Prior Correspondence Referenced to OS - 7 - 1

KOFiLMED

D R I L L I N G D I S C U S S I O N

ARCO OIL & GAS COMPANY

VIOSCA KNOLL BLOCK 863

OCS-G-4133

D r i l l i n g w i l l be done with the se l f -propel led semisubmersible r i g ALEUTIAN KEY,

which hes a water depth ra t ing of 2,000'.

Thirty Inch OD 1" WT structural pipe w i l l be j e t t e d / d r i l l to 350' below the mud­

l ine (BML). No BOP equipment w i l l be ins ta l led on the wellhead wheo d r i l l i n g

the 26" conductor hole due to the formation competency $\\. being adequate to

permit c i r c u l a t i n g the d r i l l i n g f l u i d s back to the d r i l l i n g +1200' above the

mudline. I n th^unMl^Tv^ event that a major gas flow Is encountered, the

contingency plan tu winch in the up current anchors and use the vessel'L power

to move i t to a safe distance from the location i s described under "Emergency

Procedures". A schematic diagram showing the equipment f roo the rotary table to

tha conductor shoe sett ing depth i s enclosed with t h i s appl icat ion. A 9 7/8"

p i l o t hole w i l l be d r i l l e d to 1,000* BML using seawater, wi th a viscous mud

sweep used as needed to keep the borehole clean. Af te r the p i l o t hole i s logged,

the hole w i l l be opened to 26" and f i l l e d with viscius mud pr ior to running 20"

conductor casing. Returns for t h i s hole w i l l be c i rculated to the seafioor. The

20" conductor w i l l be tested tc 200 psi before d r i l l i n g out the shoe.

The subsea BOP stack, r i se r , and diver ter system w i l l be run and connected to the

20" wellhead. Before d r i l l i n g below the 20" casing, cnly the diverter system con­

sis t ing o f a d iver te r head and two 10" diverter l ines w i l l be used to control a

well kick. ' The diver ter system w i l l be tested by closing the diverter and pumping

through each 10" l ine pr ior to resuming d r i l l i n g operations. The diverter l i n e

w i l l be equipped wi th automatic remcte-controlled valves which w i l l be opened p r io r

to shutting i n the we l l . The two l ines w i l l discharge at the opposite ends of the

vessel so that downwind diversion can be achieved. A diagram of the diver ter sys­

tem (Sec t . I ) i s enclosed with th i s appl icat ion. A p i t of 12.0 ppg mud w i l l ba

mixed and held ready in case a shallow gas sand is encountered before the 13 3/8"

surface casing i s set @ 43500' BML.

MICROFILMED

The 13 3/8" surface casing w i l l be set and cemented at +3500' BML. The previously

run, remotely-controlled hydraulic subsea preventers, consisting of two 18 3/4"t

5000WP Hydrii Type GL annular preventers and four 18 3/4", lOOOOpsi WP ram type

preventers w i l l ba used below the surface casing string. The BOPE system, except

for the 13 3/8" surface casing w i l l be set and cemented at +3500' BML. The previous­

l y run, remotely-controlled, hydraulic subsea preventers, consisting of two 18 3/4",

5000psi WP Hydrii Type GL annular preventers and four 18 3/4", lOOOOpsi WP ram-

type preventers, one of which is a blind/shear ram type, w i l l be used below this

casing string. The choke and k i l l lines, choke manifold, and hydraulically -

operated adjustable choke are a l l rated at lOOOOpsi WP. The preventer system w i l l

be stump tested prior to running and periodically tested and blowout d r i l l s held

in accordance vith OCS Order #2. The 13 3/8" surface casing w i l l be tested to

15G0 psi before d r i l l i n g out the shoe. After d r i l l i n g out the shoe and a maximum

of 50' of formation, a leakoff test v i l l be conducted and recorded. This data

v i l l oe used to help determine the depth of the next casing string i f needed.

As pore pressure or other hole conditions dictate, a 9 5/8" casing string v i l l

ba run as an intermediate protective liner @ +8700' BML. The 9 5/8" liner v i l l

ba run and the same blowout control system utilized on the 13 3/8" casing w i l l

be used. The casing w i l l be pressure tested, and a leakoff test performed and

recorded before d r i l l i n g ahead. ^

I f abnormal pressure or other hole control problems occur, a 7" contingency

liner can be run. When this protective d r i l l i n g liner is run, the same procedure

used for the 13 3/8" ana 9 5/8" casing w i l l be followed.

The v e i l v i l l be drilled to a total depth of approximately 5100', logged and

evaluated. Since the well is planned as an expendable exploratory well, i t w i l l

be permanently plugged upon evaluation, as per OCS Order #3. The specific pro -

cedure for P&A operations w i l l not be initiated without prior approval of the USGS.

An adequate inventory of nud materials, within available storage space on the r i g ,

v i l l be maintained to provide a margin of safety while d r i l l i n g this well.

See attached DRILLING PROGRAM

DRILLING 26" HOLE-WITHOUT MARINE RISER - SCHEMATIC

(NOT TO SCALE)

9 7/8" Hole to 1,0 00' SML

Casing Size

30"

20"

13 3/8"

9 5/8"

7"

D R I L L I N G P R O G R A M

ARCO OIL 6 GAS COMPANY

VIOSCA KNOLL BLOCK 863 OCS-G-4133

Depth Set

+350' BML

+1000' BML

+3500' BML

+8700' BML

+11700' BML

Geologic Data

Test Preaaure Max Pore. Press Anticipated Hasards

None

200 psi

1500 psi

2000 psi

2500 psi

8 9 ppg

10.0 ppg

12.0 ppg

15.0 ppg

17.0 ppg

NONE

NONE

NONE

NONE

NONE

See accompanying Formation Characteristics Plot for further Information

Casing Program

SIZE WEIGHT

tm GRADE CONN DEPTH

RBK CASING DESIGN FACTORS

COLLAPSE BURST TOOL JOINT PIPE BODY

30" 20"

310 133

B K-55

WELDED 1650' BTC 2300'

ML JV46 2.70

1.98 1.87 10.00 10,00

L3 3/8" 72 S-95 BTC 4800' 1.99 1.55 - — ML 5.83 1.72 9.10* 9.28

9 5/8" 47 S-95 BTC 10,000' 3.36 1.13 -45O0' 1.95 1.31 7.32 7.41

7" 32 P-110 ITC 13,000' 4.24 1.75 --_ 9700' 3.80 1.69 10.CO 10.00

6 7" i s planned only as a contingency d r i l l i n g l i n e r .

Logging Program

ISF/BHC Sonic, FDC-CNL-GR,

ISF/BHC Sonic, FDC-CNL-GR,

HRD and Veloc i ty Surveys at

SWC <» +2300'!RKB

SVC @ $4800' RKB & Intermediate Log Runs

T.D.

D R I L L I N G P R O G R A M

ARCO OIL & GAS COMPANY VIOSCA KNOLL BLOCK 863

OCS-G-4133

Mud Prograa

Depch - RKB

0 - 4,830'

4,830 - 10,000'

10,000 - 15,000'

Weight

9.0 - 9.6 ppg

9.3 -12.0 ppg

12.0 -15.0 ppg

Viscosity

40

40-45

40-50

Water L 3*

No control

4

4

BCP

BOP System

Over Casing String

None - D r i l l w i t h open returns to sea f l o o r . 30"

2 - 1 8 3/4" H y d r i i Type GL* 20" 2— 18 3/4" CIW Type "U" Double Rams* 1 - 22" Regan KFDH Diverter 2 - 10" Diverter Lines with Hydraulic Valves

2 - 1 8 3/4" H y d r i i Type CL 13 3/8" 2 - 1 8 3/4" CIW Type "U" Double Rams of which 1 i s blind/shear

type. A l l equipped as subsea stack.

Sane as 13 3/8" 9 5/8"

*Will not be used to control wel l over t h i s size casing

Testlr^ of BOP systems will be as prescribes in OCS Order 92.

Auxiliary we l l - con t ro l equipment fo r a l l d r i l l i n g operations w i l l include the fo l lowing :

1. Inside BOP f o r d r i l l pipe i n use. 2. Safety valve f o r a l l work s t r ings . 3. Kelly cock below swivel. 4. Full opening 5,000 psi WP k e l i y cock on bottom of k e l i y . 5. 10,000 ps i WP hydraulically-operated adjustable choke. 6. Recording PVT System. 7. Pump stroke counter on d r i l l e r ' s console. 8. Flow-show device in flow l i n e . 9. Mud logging u n i t with continous measurements of :

. a) hot wire gas detector; b) chromatograph gas log; c) penetration rate; d) d-exponent log ; e) pore pressure; and f ) l i t ho logy .

10. Degasser

ESTIMATED TIME TABLE

The f i r s t well on the block, well #1 (Loc A) was spudded on July 14, 1980 snd

finished December 4, 1980. The second well (#2 Loc B) spudded December 4, 1980 snd

finished January 4, 1981. The r i g was subsquentiy moved to another lease (Mississippi

Canyon Block 28) where operetions are presently underway. The earliest date that tha

th--d well is V.K. Blk 863 could be spudded would be May. 1, 1980. This time frame

would involve moving the r i g immediately upon completion of the present well in M.C.

Blk 28.

The present time estimates, are 100 days to d r i l l and evaluate each 15,000 TVD

well. The total number of wells or the order at which they w i l l be drilled cannot

be determined exactly at this time due to uncertain geological interpretations. Hov­

ever unlikely, the maximum duration of ARCO 0 & G*s operations in this block may be

3 years, i f most of the proposed wells are dulled. Attached is the d r i l l i n g time

estimated for the third well (well #3 Loc C).

_ , _ Aleutian K*T n»ei»ATnaAHCO Q I C COMTHACTOH

Vl*oca I c o l l Block 863 WELL NAME e NO. BaS * 3 a f g a

Surface 300 FWL & 4050' FSL LOCATIONLoci-ion C

OATC <»unnrnA«r1»1w M.w 1 JOB^

CONBLCTCO A* T.D. J , ' . 100 M

DCS ACS H a s . 'COOCN*

t

8 6 2

i t * oa" • r . r t * " ta* » ' oa.i 11*

n

' 3 , 8 4 0 . 0 0 '

or ucx ico |||

VICINITY MAP

I t ... *••» " t a * i t ' 0 « . 4 S 7 ^ ^ _ |

TtJO Or

. . . . . . ; 1

BLK.

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© V © V

!

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8 6 3

C en I f f P o i n t

I • l . t l 1 . 7 * 0 . 0 0 ' T « 10 , S T J . 1 0 ^ . 0 0 ' L a i I t " O T ' 4 V » J t '

LHf aa* t o ' >«. Tas'

C C 5 -6-4 3.

. u i at* oa" ro.aaa* Lo.» 2 t ' 03 0 3 6 '

MA5TEK SHEET

15,640 00

907

La* L r .

O t ' 12 t T ' • t ' o a a s T '

i

S C A L f

PROPOSE MINER/ L DEVE XPMFNT

'JOSCA K N 0 L . L AREA

GULF APPL.CATION BY

SEPT IS i9«n

OF M E X I C O APCO OIL B C AS L C A D I ' I S I O K

OF ATLANTIC RIC^HELD CO.

ARCO OIL AND £AS VENICE RA>t

ARCO 0 & 6 South Louisla.io Offs»ert D i s t r i c t rperates federal « .c ' t a t . Tea:es

from i ts -base located 1n ' er. ice, Plaquemines Parish, lc/1siai.<< ine oase

is s ta f fed w i th 21 employ .-ec, some cf wi work or a rotat1or.ai >1 s; > L-adini;

f a c i l i t i e s include a 35 ton crane and ..iu re cont-act personnc. a."»i

materials are transferred to 2nd from var*sur. seagoing vessels. Tubular

goods are stored and transferred rron. A-Z's pip? yigriUnsxt uoor Coi^.ny

personnel are normally transported to d i f f e ren t locat ions on nellccvpte " i

provided b J ^ ^ ^ m ^ ' r \ e \ i c o p t e r s Inc's 1n Venice. Communicri';nrr> eo'iiTtrant

consist o f microwave, telephone l ines md short " ive rad io , .he- base h* '

'..-(equate parking and 1s fenced i n .

Oil S p i l l Contingency Plan

I n t ' • i^ent of an o i l - p i l l , control cno clean-up ru-oceduc« t t i l l ba

ixaple,-en*ed according to the approve-: "Oi l Spx.ll Contingency Pian" or*

f i l e uich the USCS A. r e * Supervisor by Atlant ic RichfieLd Comrany (ARCO).

A?XO lb a member of Clean Culf Associates, which has r*;ynr,»e ba«=es

at Venice, Grand I s l e , Intracoastal City, and Careron in Louisiana.

The response time of -lean Gulf Associates i s v i t h i n approximately

eveIve (12) hours.

MUD OPPONENTS

Typicr* mud c::1'.nents that will b» used to dril l 'hese wells can be

found on the following four pages.

MINIMUM MUD MTCUALi REQUIRED ON LOCATION

MUD MATERIALS 0-4700 4700-13.000

Gel (sx) 500 200 Caustic Soda (sx) 50 100 Lime (sx) 20 Barite'(5- 100 ^ ?000 Lignosi iate (sx) - 150 Loss circulation materials (sx) 50 100

UUi.VARA • E MUO PRODUCTS BY TRADE NAMES DMcrlptlon or IMCO Principal Component SERViCFw B.iold Magco tar irinehtm Prinary Application

W E G H T I N G A G E N T S A N D Y I S C O i l F l E R S

Ban'.* Baroid. . Magcobar.

Lo-Watt

Aquagel Magcogel.

kt .Tv te ' te—

\c* . ( i - l aud . -Bet. e

. iMCO BniN«iGS'

. IMC? HYB

. Barrco High Tleld_..~

Blend b-1 Clay

..Zrog*.: ..Salt Gel . . . .__.

..C-'iek-Gtl Kwlk-Thik S u w C o l .

, „Ml l-Ba For increasing rrvid weight up 20 PPfl-

MM W.O. 30 ..for increasing weighi of on muds up W.O. SC to 10.* ppg.

. „ Milgel Viacoaity and . l i f . r l . i . M r o l In water-base muda.

Graan Band ...—For usa wher. iirgei pa .A V s't• la da-Clay airad lor vlscoatty w d '.vatlco control

_ Salt Water Gei.-VJsccsifiar In ta i rwi ' t r muda.

Asbetto. Tatrfc . Ih.Cf-SHLRLIFT.

BacterUVry P.oduuvd .. IVC O X C . Polyr.-«r

Plot*!

...... XC Polym-

. V'squick. Rosal ...

Ouovis XC Polymer.

S -vo.lu „ II/. -? CUr"

_Oulck viscosity In'. esh-w i t r . upper-hole muds with n v i m u - chemical treatment.

...Viscoslfler lor trash- •, a tar or stitwaitr muds.

. . Viscosifier and f i t '4*lota control addi­tive lor low-solids muda.

...Viscosifier in a I weicr-case muda, especially higrY-temparatura wi l ng Butda.

Sodium Tetra pneaphat*

Sodium Add — Pyru^aphate

D I S P E R S A N T S

IMCO PHOS ......Barofoa Magco-Phcs Oil Fos ...Thinner for tew pH freth-watei mucs where temperatures do not excee-180".

. .SAPP. .SAPP S>.rt>

Outbrtcho _ Compound

IMCO OBT

MudHtad Tannin DESCO

Procetaad Lignite IHCO LIG

n h a . _ IK CTJ THiN

Modified IMCO VC- ' 0 Lignotulfonata

Bfc»r*ed Ligncs--' IMCO R l V . 1 1 — fonate Compound

Chrome-r ret ll.'.CO RD-2000.... Ligrw.jifenaM

Tannex M-C Queb'tcho.. Tanco

Dasco Ct;-.o.._

Carbonr". T«nn A Thn. Ligco

CC-1C Caustilig 'Ligcon... .

C-Brcx:n Spersene _Uri -C«l

, SAPP --For treating c? nt contamination.

..—^Thinner lor -wtler and lime muds.

Desco Thinner for fresh-water and salTwaler muds alkalized lor pH control.

.>..DispersanL emulsifier and supplemen­tary additive lor fluid-losa cor.troL

1-6 ratio cauatic-lignlte dispersed emulsifier and Buppler*>?r'ary Mutt*, teas additive.

Dispersant anr* :iui j-.oas contn I addi­tiva for wtter-'iesi m.ids.

.Blended multi-purpoaa dispersant. fluid-tess agent and inhibitor tor IMCO RD-111 mud systems.

.X-K3 Thin .Dispersant and fluid-loss control addi­tive for water-base muds.

F L U I D - L O S S R E D U C E R S

CtLW: *•>•* set IMCO PSRMALOlD— ' " iXTR lD— - ..-Centrcls fluid toss in water-base sys­tem*.

Pf t f t* : . ' ' iZtC IMCO LOID Imprrmex My-Lo-Jtl M-',:arcn Controls fluid less in saturated salt S'Mr i wtier. and lime muds.

SocumC? coxv .. l l /CO CMC Cellvx Magco CMC Miichem C M C . For fluid-lots cor.'.rol and btnie sus-mc.nyi Cs.i; : :e 'Regular) (Reg Mar) »Re;uiar) (Med-Vis) pensicn .n water-base muCa.

Solium Carbei-y- IMCO CMC ...... Cellex Ma;co CMC ..Menem CMC ...Fer llultf-lc • control and visecfT;' rretr.yl Cellulose (Mi-Via) (Hi-Vis) (Hi-v-s) (Hi-Vis) building in lc *-seii?s muca.

.Fluid-loss control aceitive ».nd vtseos-.'.ttt in salt rruds.

Drispac Drispac Driscac Ke4yt,Risnic Ct i uiesit DP.lSPAC. rclyntr

»6»). *r.e CailulctiC DPISPAC Dnssac— D'isptw. Drisaae...... Prirr..ry flu'd-icis srdltive. secondary rClyi- f SUrrRLO Superlo SuperWj 5 r , : x »isccs!>er in wai f -base mucs.

•S5C.U-. IMCO S?-10^ •Wyacrytiia

.Fluid-less ct-.-.roi m ca cium-ti*e low SCliCS ir-.f >cr.c -otrsec mucs.

Dril l ing Mud Additives 15.

COMPARABLE MUD PRODUCTS BY TRADE NAMES (Continued) Description or IMCO Pilnelpil Ccrrpenent SERVICES Btrold Magcobar Miichem Primary Application

LUBRICANTS, DETERGENTS, EMU'-.SIFIERS, AND SURFACTANTS Extreme Praaaura. Lubricant

Proceaatd. — Hydrocarbons

Water Dispersible. Aaphalta

C ' ' v.enible. .« i i .

Cil Soluble — Surfactants

IMCO EP. LUBE

SOLTEX _

.EP Mud Lube Bit Lube.

. Soltex. Soltex.

IMCO . HOLECOAT

..... IMCO. MUO OIL

Detergent.

IMCO.... FREEPIPE

, IMCO MD -

-Baroid Aaphalt

.Skot-Free

Zon Det.

. „ STABIl-HOLE

Pavt-A-Hoie.

Plpa Lax...

D-0.

rr i -WD..

. Carbo-Seal _ .

Bland of Anionic..™.. Surfactants

An O'ganic Entity Neutralized with Amines

Blend nf Ftny Acids. Sulfonates, and Aapnaitic Materials

. IMCO SWS Trtmulso Salinex

IMCC- ... , L^S-

IMCO SPOT „

Tore Tr.m DOS-3 r_.. Mil-Plate 2.

_ SF . .0...

. Lubri-Film Used in watar-baaa muda to Impart' extreme preaaure lubricity

.Soitax Uaad in watar-baaa muda to tower downhole Iluid toss and minimize heaving shale.

...Lubricant and fluid-torts reducer for watar-baaa muds that contain no diesel or crude oil.

- Lubricant end fluid-less reducer lor water-base fluids thai contain diesel or crude o i l

.-Nonweighted fluid for spotting to fret differentially stuck pipt.

—Used in waler-baae muda lo aid in dropping sand. Emulsifies oil. reduces toroue and minimizes bit-balling.

...Emulsifier for aaltwater and fresh­water muds.

— Supplies the lubricating properties of oils without environmentai pollution

— Invert emulsion thai may bt weighted to deaired dertity lor placement lo free differentially stuck pipe.

. Petrocote

Miichem MD..

. — Atlosol &..„ Atlosol S

DEFOAMERS, FLOCCULANTS, AND BACTERICIDES . Aluminum.

Stearate Aluminum Aluminum ,

Stearale Stearate Aluminum-Stearate

Uquid Surlier- ....... Active Age-it

Surface- »ctivt Dispe'iibie Liquid Delt«mer

TioceuSiting Agent IMCO FLOC Barelloc._ Floxit

Blended IMCO CIDE Solutions

.MCO DEFOAM L.

. IMCO FOAM3AN

A'uminum Defoamer for lignoaulfonate muda Staarate

Defoamer for all water-base muds.

.....W200_ LD-7 All-purpose defoamer. W300

Separan Used to drop drilled solids where clear water is desirable for a drilling fluid.

- Bectericide used to prevent terrrwnta tion.

Fibrous Material...

Nut Shells: Fine

M e d i u m „ „ .

Coarse

Ground Mica: Fine

Coarse

Cef.cpp.ane

Ccmtmatien cf ;rz'.- ae, ranee, s? fistava mattrials z. vaneut s::es « e-

LOST CIRCULATION MATERIALS , IMCO FYBER Fibtnex Mud Fiber Mil-Fiber Filler es well es matting material

IMCO PLUG _ Wall-Nut Nut-Plug Mil-Piug Mcst often used to prevent lost circu­lation.

.IMCO PLUG Wall-Nut Nut-Plug _ Mil-Plug Used in conjunction with fibers or f.a«es tr regain lost circulation.

IMCO PLUG Wall-Nut Nut-Plug Mil-Plug „ Used wher« large crevices or fracturea are encountered.

IMCO MYCA Micatex Magco M:ca Miim.ca Used for prevention of lost circulation.

iMCO M Y C A _ Micatex .... Magco-Mica— Miimica Forms a good mat at face of wellbore.

u.'CO FLAKES _..Jei Flake Ceii-O-Seal.... Miiiiake Usee to regain los: circulation.

KWIKSEAL Kwik-Seal Kwik-Seal Kwik-Seal Usedwher arge crevtets or fractures te are encountered.

COMPARABLE MUD PRODUCTS BY TRADE NAMES (Continued) peseriplion er IMCO Principal Componenl SERVICES

S P E C I A L T Y P R O D U C T S

Bentonite Extender — IMCO GEL EX Benex Benex Benex.

inhibiting Agent.

Baroid Magcobar Miichem Primary Application

..IMCO IE PAC.

Synergistic IMCO POLY Rx Rasinex Polymer Blend

Biodegradable IMCO FOAMANT Surfactant

High-Temperature IMCO ORILTHERM Polymer

Multipurpose IMCO POLYSAFE Polymer

..Increases yield ot bentonlte to l om very low-solids drilling fluid. -

..Imparts high-temperature lluid-loesj control, temperature stability and in­creased inhibition.

...Rheoiogicai stabilization and nitration] control.

„ Foaming agent In air or mist drilling

...High-temperature fluid-loss control

Polymer for fluid-loss conlrol.

Sodium m.

Chromate

Sodium Hydroxide —

Sodium Carbonate —

Sod ium— Chromate

.Caustic Soda.

. Soda Ash

Sodium-Bicarbonate

Barium Carbonate

Sodium Bicarbonate.

Barium Carbonate. . . .

Calcium Sulfate Gypaum ..„

ICalcium Hydroxide — Ume

Sodium Chloride ...

C O M M E R C I A L C H E M I C A L S

.Sodium Sodium Sodium

Chromate Chromete Chromate

.Caustic Soda Caustic Soda Cauatic Soda..

.Soda Ash Soda Ash Soda Ash

. Sodium Sodium _._ Sodium Ricarbonate Bicarbonate Bicarbonate

. Anhydrox Barium Barium Carbonate Carbonate

..Used In water-base muds to proven! high-temperature gelation.

...For pH control in watar-baaa muds

.Gypsum Gypsum Gypsum.

.Lime Lime . . . . Lime

...For treating out caleium sulfate in low pH muoa.

...For treating out calcium sulfate or] cement in nigh pH muda.

. .For treating out calcium sulfate (pH| should be above 10 lor best results)

.Source of calcium for formulating gyp muds.

Chrome Alum (chromic chloride)

. Salt - Salt... Salt Salt

.Chrome Alum Chrome Alum Chrome Alum Chrome Alum.

..Source of calcium for formulating lime muds.

.For saturated salt muds and resistivity] control.

..For use in cress-linking XC Polymer Systems.

O I L - M U D A D D I T I V E S

»rimary r nu l * i l i e r IMCO KENOL-S (L) . . Invermul Vertoil and IMCO KEN-X Cone. »1(L)

rViseosifier and IMCO KEN GEL Gel-Tcne VG-C9 Gelling Agent and and

IMCO KEN-X CONC.*2 Petro-Tone

Wlgh-Tempernure IMCO KEN-X Duratone HT. DV-*? and Stabilizer Cone. «3 DV-33

JStabiiiets Eorenc' t . . . . I M C O VR Ccnei'.iora

, Carbo-Tec (D).„Pr:mary additives to lorm stable water-and in-oil emulsion. Carbo-Tec (L)

. Carbc-Gel. Provides vijccslty. weight suspension. and filtration control.

.Improves emulsion under high-temperature conditiona.

.Stabilizes running shale, improves emulsicn. weight suspension, and fluiC loss under hign-temperature ceneitiona.

C O R R O S I O N I N H I B I T O R S

[Zinc Ccmpcunc IMCO SUlF-X II - - For use as a hyer<,gen aulfice scaven-J ger in water-base mc oii-b*«* mucs

IMCC CRACK CHEK _ Prevent stress cracking of crii. stnr.gs m an K,S environment.

r LiCViC Cerrcs:Sfl i inA'SitOf I U C*:a:>:es IMCO XC- Coat 77T A-2C2 For use as sn cxygen scavenger. ; Amms'ntf-iyrr Bisulfite

?,<- a-—e IMCC X-ZZ" .Corrosion innifciic

- » L J ! ; ' I I " C N C » » E « - » * " * ^ n n *•»•«>•«

Drilling Mud Additives 17 .

COMPARABLE MUD PRODUCTS BY TRADE NAMES (Continued) description or Principal Component

IMCO SERVICES Baroid Magcobar Miichem Primary Application

C O R R O S I O N I N H I B I T O R S ( C o n t i n u e d )

P l l m l n n A m i n At . _. „ IMCO PERMAf ILM _ ..-Corrosion Inhibitor. r R f M e t T M e ^ f i e * r 1 W — » — —

Of/ " t« f * i r **n lvf f leVf — _ IMCO SCALECHEK Scale inhibitor. - ' I ' j C ' i l V W ' J X W * — — —'

Calcium Oxide

Ft try Acid --

IMCO KFNOX u ....Calcium source lor saponification.

- ' I ' j C ' i l V W ' J X W * — — —'

Calcium Oxide

Ft try Acid -- iur.r> t f fw Oil! t i t Primary emulsifier and stabilizer loi Emulsititr SUPREME Cone. A oil-base driUing fluid!..

Eniuiiiofi • , | u o o KEN .. DG-S5 —Imparts gels, contributes to viscosity Stabilizer SUPREME Cone. B for weight suspension, and provides

firtra'ion control.

Specially Modif ied.-. Saponified Fatty Add Chemicals

^ IMCO KEN PA.< -SF-100 .. ...Geiling agent lor formulating high-g vl ation easing packs.

Specially Modif ied.-. Saponified Fatty Add Chemicals

...Geiling agent lor formulating high-g vl ation easing packs.

kWttinfi Aoernt and _ IMCO KEN CAL-L .....Wetting agent and dispersant for oil Ditpertant muds lor the reduction and/or stabili­

zation of viscosity.

NOTES

SECTION " I " 1 of 8

DRILLING RIG DESCRIPTION

ARCO O & G plans to use the Aleutian Key, owned by Keydrll I nc . , or a

d r i l l i n g vessel of s im i la r speci f icat ions to d r i l l these wel ls . Speci f icat ions

of t h i s semisubmersible r i g which 1s presently dr511ing the f i r s t well on

Viosca Knoll Block 863 can be found in the next 7 pages.

Storm-Survival:

The American Bureau o ' shipping (A3S) Registry Rating for th is Vessel Is

MaTVese Cross A - l , t r 1 i m i t e d ocean operation. I t i s designated to meet

a l l U.S. Coast Guard and ABS requirements using 100 knot design wind

condit ions and waves.

C •j' page 2 Of gs

ARCO 017. & GAS COMPANY KEYDRJLL ALEUTIAN KEY

'« DIVERTER BOP SYSTEMS

SYSTEM Over Casing String

None - D r i l l wich open returns for sea floor. 30"

2 - 18-3/4" H y d r i i Type GL* 2 - 18-3/4" CIW Type "U" Double Rams* 1 - 20" MR 18-5/8" Vetco Type 'HY' Diverter 2 - 12" Diverter Lines with Kydraulic Valves

20"

2 - 18-3/4" H y d r i i Type GL 2 - 18-3/4" CIW Type "U" Double r^ms of which one i s

blind/shear type. A l l equipped as subsea stack.

13-3/8"

Same as 13-3/8 • i 9-5/8

* H i l l n o t D e u s e d to contro.V wel l over t h i s size casing (only diverter w i l l be used.)

Testing of BOP systems w i l l as prescribed i n OCS Order #2.

Auxiliary w e l l - c o n t r o l equipment fo r a l l d r i l l i n g operations w i l l include the f o l l o w i n g :

1. Inside BOP f o r d r i l l pipe in use. 1

2. Safety valve f o r a l l work s t r ings . 3. Kelly cock below swivel. 4. Ful l opening k e l i y cock on bottom of k e l i y . 5. Hydraulically-operated adjustable choke. 6. Recording PVT System. 7. Pump stroke counter on d r i l l e r ' s console. 8. Flow-show device i n flow l i n e . 9. Mud logging u n i t wi th continuous measurements of :

s) hot wire gas detector; b) chromatograph gas log; c) penetration rate; d) d-exponent l o g . e ) pore pressure; and f ) l i tho lugy

10. Degasser 11. 4 - 18-3/4" Rem Type Preventers, 10,000 psi WP, 3 pipe rams and 1 blind-shear

ram; BOP's actuated by 3,000 psi accumulator system with s u f f i c i e n t f l u i d capacity with con t ro l console at d r i l l e r ' s s ta t ion and two remote locations.

A l l B0PE is 10,000 ps i W.P. xcept two 5000 psi W.P. Hydri i preventers Diverter Operation: At the f i r s t sign of a k i ck , which w i l l be an increase i n mud p i t vol'ime and/or increase i n flow rate, the 12" diverter l ine downwind of the r i g w i l l be opened. Then B o P b e closed to d iver t the well f l u i d s away from the r i g . The diverter line w i l l always be opened before c i r s ing the Vetco Diverter to prevent flow around the shoe of the conductor pipe.

BOP & DIVERTER SYSTEM, rigure 1, i s on fol lowing page.

c £ p.ge 3̂ of &

Keydrill Aleutian Key

BOP & DIVERTER SYSTEM

Port Dlverter-Ilne

To Shaker

Starboard Divorcer ——< Lxne

Keraataly-Canc-olled Hydraulic Valves*

•10,000 p t i W?

J

Riser Tension Uses RKB .

-Diverter Read

0>

Fill-Dp Use

Choke Line*

? Q T -

Ball Joisr

5,OOO Psi W» Arsulex Prrverxer

Rtser Cc

3.000 Psi W> Amulax Preventer

Blind/Shear Baa*

Pipe Raas*

Teocely-Cantrolled Rvr=TT.:11c Valves*

•'JeLlheaC Corrector

Section " I " • of 8

- /> C

FIRS :* IGHT ISC EQUIPMENT

F i r e r i g h t i n g Equipr-ant : One (1) Fixed KIDDE C02 sysre.- f o : nud pus? rocc: .2 - Cylinder and hose nozzles, 150 *.b. cn?.

One (1) Fixed KIDDE C02 systen £or engine rcco ar.d engine c o n t r o l roon, t o t a l . -)d£c£ type, 75 l b s . 36 b o t t l e s

One (1) Fixed KIDDE, CO 2 systee . f o r paint locker t o t a l f l o o d i n g type, 75 lbs . x 2 b o t t l e s

Th i r ty -Nine (39) C02 (15 l b s . ) porccbie e x t i n ­guishers

Three (3) ?oa= (2.5 gel) extir.3uisr.ers, Tvo (2) Dry Powder (iCO lbs) Ext inguishers , placed

Hi _ W " " around the r i g Cne (1) F i re AI i r r . Sensor Systez, (T«XO) f o r

p r o u l s i o r . -achir.e rooa One .(!)' AF-DC-250C-2R A=ericen Skid Dry C'r.e-ical

Fire Ext inguish ing Cr.ic v i t h :v.-c (2) 150' r ee l s , hoses and r.ozzles.

r i v e '5) A7-uTn-A : a r i c i n Skid Ligr.t V.sr.ar Uait (1500 gal) w i t h two (2) 150' reels , hoses ar.d nozzles.

One (1) Model 60C Srir,er console Gas Setectcr Systen

( Section- I * of 8 « i - -

POLLUTION C0X1F L , SEWAC." TREATMENT,

/ J D WASTE COyT.'.OL

A. Sewage Treating end Sol id Vfcste "isposO.

The Aleut ian Key i s equip?, wi;V a. FAST Model 80DO/60D4G Sewage Treatment Systen which w i l ] neet or exceed a l l regulatory requirements f o r ef f i ' . je r . t discharge. Sol id waste materials w i l l be transported to shore d isposal . -

B. L i c u H Disposal

The d r i l l i n g nud and cu t t ings which do not contain any o i i or substances which may be hanaful tu aquatic l i f e or w i l d l i f e , or i n j u r i o u s in any manner to l i f e or proper ty , w i l l be disposed i n t o t r - ocean waters.

C. P o l l u t - Jontrol Equipnent on D r i l l i n g Vessel

The d r i l l i n g vessel i s equip*ed w i t h curbs, gut ters , t raps , < l r i - ans end drains lead'.r.g to tvo o i l - w a t e r separators located i n - center caisson f e r removal of o i l , greases or po l lu tan t s as required by r e g u l - _ o r y bodies f o r vater discharge.

m ' A L E U T I A N KEY / m*%.+e& "X" * of s

<£0 **v

Emtrc,?r zy

Ovirbccrd

Tc Mud S i t u m rrc ce ssing Equipment

A.c; ucit<< "o!\e ( t yp icc : }

To Sub Ste = 0. ?. Stack F i ! ! L ?

Lin*

V ' f i t c - y ; t "HY" Oiv t .Mt ; S y t u n wi: Ecc "*feve.-tc , Cc.-.trefi c: DriSitr 's "C$i!il-. Cn Of:!! ' \zzt

l o r r . c l Cptrs i ip 'n - Vcive " i " Open , Vckes " a " £ "C" C l c s t d , ?cc Pr ev •.*.•», r

E.T.er;*.-.* / Opercfion - Vcive " i " C!*.i«d = :_5 ?rtvfi.-.ie: Clcicc , Either Ve*vi " S" or 0;s (0 ;«*J VcJvt icw.-.r.-i.ii S.'i* r,

KSYDRit.

/ Section V 7 of 8 i '

HOSITORINC EQUIPMENT

Mud Voluae Indicator i KVTX-4 Explosion Proof Mud Voluic Totalizer Systea (Martin-Dack«r) for four pics consisting o f : (1) KVCX4 Indicating end Alara ccnsoU v i t h

Total Voluae.Mtttr, Cain/less deviation aecer v/centar sero, gain/less sac poinc alara, integral audio signal v/?rovi*ion icr t x t e m i l -custoaer supplied tudiectr visual alara.

(M) H1012X-12 Series Fiotr/Trtr.sductr ?robe

C-.» (1) MVPV2-1 Recorder (Martin-Decker) tvo th*.•::*! >f iccrd to ta l barrels ar.d ja in/ los* daviic:

Mud Volume Recorder

•••

Xyr n o v - F i l l Indicator Sw <r. : KFIX2-3 Mud Flow-Fill Systea (Msrtir.-Seckar)

KTCM2-1 Indicating and a l i r a console v i t h (1) MFTX2-2 flow sensor ar.d (2) K1234A ?ur\? sttoka sviteres

TYPICAL SEM I-SUBMERSIBLE RIG

SHEET 2 OF 3

PROPOSED MINERAL DEVELOPMENT

GULF APPLICATION BY

OF M E X I C O ARCO OIL 8 GAS COMPANY

4 Oivtsio, 0' ITUHfTlC NCNhtLB CO. LAFAYETTE, L A .

COASTAL AREA BOARD t CERTIFICATION OF CONSISTENCY APPROV-

FOR OCS LANDS PLAN

TO: Mr. Frank S. Pons, Act ing Com. Mgr. CAB Reference 9 GS-80-01 United States Geological.Survey ?. 0. Box 7944 M . i t a i r i e , LA . 70010

FROM: Alabaaa Coastal Area Board P. 0. Box 755 Daphne, Alabana 36526 (205) 626-1880

1. T i t l e o f OCS Lands Plan: Explora t ion Plan and Perai t Appl ica t ion f o r OCS-G 4131. Viosca Knol l Block 863. Wells 1 and 2. USCS gQS-7-2.

2. Naae and Address of App l i can t :

Naaa A t l a n t i c R ich f i e ld O i l and Gas Coapany Street or Sox P. 0. Box 51408 C i t y , S ta te , Zip Lafayet te , LA 70505 Hone Phone Business Phone

3. /X7 Tha Coastal Area Board has reviewed t h i s OCS Lands Plan and C e r t i f i -c a t i o n of Consistency and has found i t to h* consistent w i t h the Coaatal /.rea i'aragereent Progran. This approval i s cond i t iona l ,?on compliance w i t h che management progran and the f o l l o w i n g condi t ions : - Th«a applicant s h i l l carry out t h i s p r o j e c t according tc the design

Standards described i n the GCS lands Plan. - The -lupllcant sha l l neet a l l conditions set f o r t h i n the NPDES

p e r a i t pertaining to t h i i a c t i v i t y . '

4. / , Tha Coastal Area Board has reviewed t h i s OCS Lands Plan and C e r t i f i ­c a t i o n of Consistency and has found l t to be inconsis tent w i t h the Coastal Area Management Prograa. The reasons and supporting decal ls f o r the objec t ion and a l t e r n a t i v e aeans suggested by the CAB to conduct the use i n compliance w i t h the management program are a t tached. The appl icant has a r i g h t o f appeal to the Secretary of Coranerce i f the a c t i v i t y i s consistent w i t h the object ives of the A c t , or i f necessary l n the In te res t of n a t i o n a l secur i ty , as described i n Section 4, 15 CFR Part 930.

/ /

Authorized CAB Signature

cc: Assis tant Ada in i ' j t r a to r , O f f i c e of Coastal Zcne Management A t l a n t i c R i c h f i e l d O i l and Gas Conpany

United States Department of the Interior GEOLOGICAL SURVEY RECEIVED SO. LA

M M m u . o r r i c c »i-DO . u o . N C A U M W A Y B L V O

M E T A I R I E . L O U I S I A N A 7 C O I O FEB 2 019ft\

In Reply Refer To: OS-7-1 OFFSHORE DRLG.

FEB 17 1981 ARCO 011 and Gas Company At ten t ion : Mr. Wally Worthington Post Of f ice Box 51408 Lafayet te, Louisiana 70505

Gentlemen:

Reference 1s made to your telephone conversation of February 10, 1981, between Mr. W. • f f T t f T f * " ' * anc Mr. Kent Stauffer of t h i s o f f i c e , concerning the withdrawal of your Supplemental Plan of Exploration for the proposed a c t i v i t i e s 1n Viosca Knol l , Block 863, Lease OCS-G 4133.

Included with the enclosed plans are checklists and guidelines which may ho oT assistance to you for future plan proposals.

Sincerely yours,

D. W. Solanas Deputy Conservation Manager Off 'hore Operations Support Guli of Mexico OCS Region

Enclosures

». ARCO Oil and Gat Cort£Jfoy • S f . : ih Louisi- na District

Po t t Office Box SU08. Oil Center Station Lalayet t t , Louisiana 7050S T t lephona 318 2B4 4000

January 30, 1980

Mr. D. W. Solanas Area Oil & Gas Supervisor U. S. Geological Survey P. 0. Box 7944 Metair ie, La. 70010

Dear Mr. Solanas:

This l e t t e r 1 * a request to amend our Federal Exploration Plan fo r OCS-G 4133, Viosca Knoll Block 863. Because of addit ional seismic Information 1n Viosca Knoll Block 863, we h*opose to move our No. 1 well locat ion to 1,800' South of the North Line and 2,400' West of the East L ine. This w i l l allow tes t ing o f the subsurface s t ruc ture in a more opfr.ium locat ion . The projected TD f o r t h i s well (13,000' TVD) remains the same.

A sidetrack we l l (OCS-G 4133 12) 1s planned to be d r i l l e d from th i s loca­t ion with pro jected bottom hole locat ion as shown on the o r ig ina l explora­t ion plan. Projected TO for th is wel l is 6,5f ' TVD.

Subsequent surface locations and/or bottom hole locations of sidetrack wells d r i l l ed from t h i s new location w i l l be determined from informat ion derived from our f i r s t w e l l .

Please advise i f addi t ional information i s needed, or i f there Is anything we can do to a id in the review process.

Very t r u l y yours , /

D. L. Edmiston C. C. Lowe, Jr. w/attachments W. G. Stoddard F. L. Knioht J . W. Schmidt

VRW:mc A»*£ cc: Kessrs. B. E. Booth

ARCO Oil and Gas Company South Louisiana Diatrict Poat Ofllce Boi 51408, Oil Center Station Lafayette, Louisiana 70505 Telephone 318 264 4000

October 14, 1980

Mr. D. V. Solanas Area O i l & Gas Supervisor U. S. Geologica l Survey P. 0 . Box 7944 M e t a i r i e , LA 700J0

Gentlemen:

As proposed by ARCO and approved by you we have changed the proposed PBHL of the s ide t r ack w e l l (OCS-G-4133 02) t o be d r i l l e d f r o o the present w e l l OCS-G-4133 # 1 . The proposed PBH l o c a t i o n was the *D' l o c a t i o n s u b m i t t e d i n the Supplemental Plan of E x p l o r a t i o n which inc luded l o c a ­t i o n s C through J . To e l i m i n a t e approving the ' D ' l o c a t i o n tw ice ARCO i s r e v i s i n g the l o c a t i o n p l a t and s t r u c t u r e p l a t t o i n d i c a t e the c o r r e c t Supplemental Plan of E x p l o r a t i o n f o r l o c a t i o n s B,C and E through J . L o c a t i o n A i s the s i t e o f w e l l #1 and l o c a t i o n D i s the PBHL of Wel l #2 and t h e i r l oca t ions are i n d i c a t e d i n r e d . Locat ions A and D are a l ready approved .

A t t ached are a l o c a t i o n plac ard s t r u c t u r e map showing locs txons B, C, E, 7 , <?, E, I , end J nt the l o c a t i o n s f o r the Supplemental <?le.. o f E x p l o r a t i o n . A l l o the ; p e r t i n e n t i n f o r m a t i o n to the p lan rea-,.ins the same as o r i g i n f - l i y submit t . e J .

Please i d v i . e l f a d d i t i o n a l i n f o r m a t i o n i s needed.

R e s p e c t f u l l y vours,

W. R. Worthington D i s t r i c t D r l g . Engineer-Offshore

sh

cc: Messrs: J. L. Morgan L. G. Shivers C. R. Veillon W. G. Stonddard E. Dauterive V.K. 863 Gen. Lease File

Attachments

»»co on

ARCO Oil and Gat Con ;.y South leuisiena Districl ^us . Ol l ic t Box 51408. Oil Center Station Laiayette. Louisiana. 70505 Telephone 315.264 4000

VK SCI rUe.* **°K

September 10, 1980 f ^ S E P 2 5 i 9 8 Q .

Mr. D. W. Solanas N t 4 f c l f c S W P W * r o f S ^ Area Oil h Gas Supervisor ^*<<JL?.C??!LS*^ U. S. Geological Survey P. 0. Box 7944 Meta i r i e , La. 70010

Dear S i r :

This l e t t e r transmits nine (9) copies of an addendum to our approved Exploration and Permit Applicat ion for OCS-G 4133 (Viosca Knoll Block 863). This addendum submits eight possi­ble additional locations for th is block. Information derived from our f i r s t w e l l , which is current ly d r i l l i n g , w i l l help determine the next optimum locat ion. Five copies have the conf iden t ia l Structure Contour Map.

Ple«-.»e advise i f addit ional information is needed.

Very t r u l y yours,

V. R. Worthington D i s t r i c t D r i i i i n g Engineer - Offshoi" 1

nc

cc: Mr. J. L. Morgan V.r. L. G. Shivers Mr. C. R. Vei l lon ^ Mr. V. G. Stoddard '••13 Sfc3 General Lease Fi".e

ARCO < »n and Gas Company ^ v :iou«h Louisiana Qlstrict

' -v *• 5 r»ost Ott ict Box 51408, Oil Cenler Station • • Lafayette, Louisiana 70505

Telephone 318 264 /•-•OO

September 15, 1980

Mr. D. W. Solanas Area 011 & f.as Supervisor U.S. Geological Survey P.O. Box 7944 M e t a i r i e , La. 70010

Reference: OS-7-1 Viosca Knoll Block 863 Exploration Plan Addendum

Dear S i r :

We are J ^ J L J M I B T " ' '"-"-) copies of addit ional information requested by your department in regards to the addendum to the approved Exploration plan fo r Viosca Knoll Block 863. This includes:

a. Location Plat b. V i c in i t y Plat c. Estimated Time Table

•d . Shallow Hazards Description e. Onshore Base F a c i l i t y f . Oil Sp i l l Contingency g. EPA Discharge Information h. Mud"Components L i s t

• I . Rig Description J . D r i l l i ng Program

As mentioned in our cover l e t t e r of September 10, 1980, we wish your approval fo r addi t ional possible locat ions previously not covered by our Original Explorat ion plan. We w i l l apply fo r indiv idual permits from the Metair ie D i s t r i c t as soon as we decide on the exact locat ions of the next we l l s . Please advise i f more information is needed. Your prompt reply w i l l be appreciate*

Sincerely yours,

Wally R. Worthington D i s t r i c t D r i l l i n g Engineer-Offshore

j s

cc: C. R. Vei l lor - attachments L. G. Shivers V. R. Worthington J. L. Morgan W. C. Stoddard VK 863 Ghl Lease File

i

DEPARTMENT OF THE ARMY N E W O R L E A N S D ISTRICT . C O R P S O F E N G I N E E R S

N C W O H L C A N f l . L O U I l ' A M A

P. O . BOX . « 0 * * 7

LMSOD-S? (Gulf of Mexico) 2665 2 1- FEB 1980

Arco O i l L Gas Company Divis ion of A t l a n t i c R i c h f i e l d Company Arco Plaza, 515 South Flower Street Los Angeles, C a l i f o r n i a 90071

Gentlemen:

Inclosed i s permit dated this date authorizing construction, maintenance, operation, and removal of structures and appurtenances required for o i l , gas, or other mineral exploration, production, storage, and transportation operations i n the Gulf of Mexico, block 863, Viosca Knoll area, central to a point about 63.0 ailes northeasterly from Pilottown, Louisiana, off Plaquemines Parish.

Your attention is directed to the terms and conditions of the permit, especially to conditions which require that the location and plans of a l l structures or work authorized by this permit shall be submitted to and approved oy Che District Engineer before work thereon is commenced, that the permit is revocable by authority of the Secretary of the Army, and i f the work is not complett i or. or before 31 March 1990 the permit, i f not previously revo1 id or specifically extended beyond that tine, shall cease and be null and void. I f you desire the permit to be extended beyond the expiration dete, yoL should apply for extension 120 days prior to expiration.

If work authorized by this permit is not begun within 1 year of the date of issue, approval of the District Engineer must be obtained prior to corzsenceaent of operations.

LMi; FL 628-1 Edition cf ?5 Oct 73 is obsolete. 1 Feb 75 (ER 1145-2-303)

Applies* « aaBBsSECftilf n f ifaicaXZfifiS

Name of .Applicant Arco O i l ar.d g v. Company

Effective Oate

Expirat'-on Date (If applicable!

DEPARTMENT OF THE ARMY PERMIT

Rrfe*ri te t o wr i t ten reouest lated 1 t i o v e r ' b p r 1Q7Q i 0 , , permit to:

t X) PeHorm work in or allecting navigable waters of the United States, upon the recommendation ol'.'tm Chief o< Engineers, pursuant to Section 10 o> the Rivers and Harbors Act oi March 3.1899 (33 U.S.C. 4031:

< * Oiteha'v* dredgee or (ill material into waters of the United States upon the issuance ot a permit (torn the Secretary o< the Army 1 throws* the Chiel ol Engmeers pursuant to Section 404 ol the Federal Watar Pollution Cont-oi Act 186 Stat. 816. P.L.03-500):

( I Transpon Or edged material fee i « purpose o l dumping n mto ocean waters upon the issuencjp^^.-.ermi- from the Secretary of *he Army acting through the Ch* ngineers pu-suant to Section 103 ol the Marine Protection. Re*e*rcn ano Sanctue-wt Act ol 1972 186 S u i . 105'/. P.L. 92-5321.

A - C O O i l and Gas j"—itTf^jWi -D i v i s i o n c f A c l a n f f l ' ^ - i - n r l a i d Coepany Arco Plaza, 515 Soutb Flower Street Los Angeles j Ca l i fo rn ia 90C71

iv he i-h> auihwri<cil iV; the Secretary r l the Army: 1 0 cons t ruc t , maintain, operate, and remove structures and appurtenances required f o r o i l , gas, i r other mineral explora t ion , production, storage, and t ranspor ta t ion operations,

j :he Gulf of Mexico, block 363, Viosca Faol l

*1 c e n t r a l to a point about 63.0 miles northeasterly from Pi lot town, Louisiana, o f f Plaquecines ?arish,

in j . i u i f i j r t r w i th the plans and c twfasp attached hrreio which tie incurpuralcti in «id made i pari . this permit (on d.rawtuf*! five file nu*:'.h«r ur u lhei deli.-'ite id rn i in t , l ion marks.) . - . , , , ,_ . , . ,

in four s ts, t i t l e d , "Oil well structures i t . he Gulf of Mexico * * *," dated 10 Decenber x979,

M*fM«k1 l u t h r i i 'K.n. inf cundiiioni

I. Centra: Conditions:

a The: a" eCtrvwei lOentM.ed ano authontee " ( i ^ 'hail be consistent with tne ie»m, and conditions ol i h i , permit, and that anr a o . .•••et no: tpec>i-ca"v io>nnl.ed and authonied he rem sha" consntute a violation oi the ten •. a-d conditions ol this pe.m t which r-v»» -es-'t •« me mooilicanon. suspension oi revoraiiO" c" this oermn. m wftoie oi in part, as set lorth more spec •<-can v m General CO'C-t O-t , C k h f 'e ie , end ie the institution ol Such i r c j pioceedmci as the United States Government may -.onsider approoriate.

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b". Tha t al l a c u i t i e s a u t h o r i z e d h»»ein she l l , if t h « y i n v o l v e d u r i n g f h * i r c o n s t r u c t i o n or o p e r a t i o n , any d ischarge of p o l l u t a n t s i n t o wa ie ' s o l i n« u n u t d S u t e s or ocaan maters, ba at an t imes cons i s ten t w i t h app l icab le wa te r q u a l i t y - . tandards. e i i i u e n t l i m i t a t i o n s and standards o l p e r l o » m * n c e . p r o h i b u - o n t p r e i ' e a i m e n i s tanda rds a n d manaoemen t pract ices es tab l ished p u r s u a n t t o the Feoera l Wate r P o l l u t i o n " C o n t r o l A o o f 1 S 7 . IP .L . 92 500 : 8 6 S ta t . 8 1 6 1 . t h e M a n n e P r o t e c t i o n . Research and Sanctuar ies Ac t o l 1972 ( P . L . 9 2 - 5 3 2 . 86 S ta t . 10521 . o r p u r s u a n t i o aoo'-cabie State a n d l oca l l a w .

C. That w h e n the a c t i v i t y a u m o n t t d ha rem invo lves a d ischarge d u r i n g i n c o n s t r u c t i o n or o p e r a t i o n , of any p o l l u t a n t ( i n c l u d i n g dredged or t i l l m a t e r i a l ) , m t o waters o l the U n i t e d - S t a t e s , the a u t h o r i z e d ac t i v i t y sha l l , i f app l i cab le wa te r c u a i . t y standards are rev ised o i mod i i >ed d u r i n g the t e r m o l th is p e r m i t , be m o d i f i e d , i t necessary , t o c o n l o r m w i t h such revised or m o d i f i e d wa te r q u a l i t y s tandards w i t h i n 6 m o n t h s o l the e f fec t ive date o l any rev is ion o r m o d i f i c a t i o n of w a t e r q u a l i t y s tandards, or at d i r e c t e d b y an i m p l e m e n t * ! o n p lan c o n t a i n e d in such revised or i n o d i l i e d s t a n d t r d s . o r w i t h i n such longer p e r i o d o< t - n t as t h * O i t i r i c t Engineer , i n c o n s u l t a t i o n w t : n l h * Reg iona l A d m i n i s t r a t o r Of the E n v i r o n m e n t a l P r o t e c t i o n A g e n c v . m a y d e t e r m i n e t o be reasonable unde r t h * c i rcumstances.

d . That the d ischarge w i l l no t dest roy a t h r e a t e n e d or endange red species a* i d e n t i f i e d unde r the Endangered Species A c t . o r endanger t h * c r i t i c a l hab i ta t of such ipeews.

* . That t h * p e r m . t t f e agrees to make every l e a s o n * e f f o r t t o p o s e c u t i the c o n s t r u c t i o n o r o p e r a t i o n of the w o r k a u t h o r i s e d herem i - i manner vo as t o m i n i m i z e any adverse i m p a c t o n l i t h . w i l d l i l e . and na tu ra l e n v i r o n m e n t a l values.

' -vat the p e r r t M i i e * agrees lha th< v i l l o 'osecure the c o n s t r u c t i o n or w o r k a u t h o r i s e d here in in a m * n n * i t o at t o m i n i m i z e eny d e c ' i t i o n o l w e t * ' q u a l i t y .

g. T h a t t h * permn-.ee t h a n u e r m n the D is t r i c t Eng ineer or h i t a u t h o r i z e d r * p r * * * n t a t h r a ( l or dcsignee(s) t o make p e r i o d i c inspect ions at any n m * d e e m e d necessary m o rde r t o assure t h a t t h * a c t i v i t y b e i n g p e r f o r m e d u n d e r a u t h o r i t y of —, i p e r m i t as in accordance w i t h t h e te rms and c o n d i t i o n s p rescr ibed h e r e i n .

h . Tha t the c e r m i t i e * shal l ma in ta i n t h * s t r u c t u r e O' w o i k a u t h o r i z e d here-n m g o o d c o n d i t i o n and in a c c o r d e n c ; • the p lans a n d d raw ines a t t a c h e d h e r e t o

i T h a i Dcrmt - does n o t convey any p r o p e r t y l i g h t s , e i t h e r m real estate o r m a t e r i a l , o r any •ec lua ive pr iv i leges: and l h a t i r does n o t e u m o ' . v i n j u r y t o p r C D * ' t y o« i m « s i o n o ' n g h t s O' any i n f r i n g e m e n t o« Federa l . S ta te . 0 ' loca l laws or regulat ions nor does i t obv ia te t n * r e o u i r * m e r i t o o b t a m State o> i x a i assent ' * q u i ' * d by law (or t h * ac t i v i t y a u t h o r i z e d here in .

j . T h a i th is p e r m i t may be summar i l y t u p e n d e d , i n w h o l e o ' m p a n . u p o n a l i n d m g by t h * D i s t r i c t Engmeer that i m m e d i a t e suspension of t h * a c t i v i t y au tho r i zed n * r * m w o u l d be m t h * genera l p u b l i c -nterest . Such suspension shal l be e ' l e c t - v * u p o n r«c*<> ' by t h * pe rm i t t ee o l a w r i t t e n nonce thereof wh . cn t h i l l mc ct>t* ! 1 ) t h * e x t e n t o l t h * suspens ion. 12) t h * reasons for th is a c t i o n , a n d (31 eny c o r r e c t i v e o> p reven ta t i ve measures to be t a k e n by t ' e p e r m i t t e e w h i c h are d e e m e d necessary bv the D is t r i c t Engineer t o abate i m m i n e n t hazards t o the general publ ic interest . The p e r m i t t e e shal l t a k e i m m e d i a t e a c t i o n t o c o m p l y w i t ' the p rov is ions o f t h i s n o t i c e . W i t h i n t en days f o l l o w i n g i*c*<pt o l this n o n c e o t suspens ion , t h * p e r m i t t e e m a y request a hear ing ir. order t o present i n f o r m a t i o n r * i *van t t o 3 d e c i s i o n as t o whe the r his pe rm i t s h o u l d be r e i n s t a t e d , m o d i f i e d o r r e v o k e d . H a hear ing i t reques ted , u shal l be c o n d u c t e d Putsuan i t o p r o c e d u r e * prescr ibed bv the C h i e ' o l Eng ineers . A l t e r c r r - i p i e t i p n o> the hear ing , or w i t h i n a reasonable t ime a l te r issuance of t h * suspens ion n o n e * 10 t h * p r r m . i t * * i f no heanng i t r e q u e s t e d . ' e o e r m n w i l l * i t h e r b t r * i n s t a t * d . m o d i f i e d or r e v o k e d .

k. T h a t t h u p e r m . i m s y be e n h e i m o d i f i e d . s u t p * n o e c O' ' e v o k e d in w h o l e or m part i t i n * Secre tary o l the A r m y or his a u t h o r i z e d representat ive c e t e m m e s that there hat been a v -o i a i - on o i any o r r n * terms or c o n d i t i o n s of th is p e r m i t o- l h * i such a c t i o n w o u l d Otherwise b * i n t h * p u b l i c in terest . Any . j e h m o r j i l i c t o n . s u s p e n s i o n , or r e v o c a t i o n shal l become e l f e c t i v * 3 0 ays a h t f r * e * i p t by lhe p e r m u t e * of w n t t e n n o n c e of such acnon w h i c h Shall spec i fy t h * l ac i s o ' c o n d u c t w a r r a n t i n g u m * unless (11 v . t h i n t h * 3 0 - d a y p e r i o d l h * p e r m u t e * is abie l o u n s l e c t o n i y demons t ra te tha t la) t h * a l leged v i o l a t i o n o l t h * t e r m s and t h * c u n d m o n s o i th i s p e r m i t d i d n o t . in ' e c u occur o r ' l b ) m e surged v m i a n o n wat acc iden ta l , and t h * p e r m i t t e e has been o p e r a t i n g i n comp l i ance w i t h the te rms and c o n d i t i o n s of ihe p e r m i t ana u able i o p iov -oe u t i t t e c t o r y assurances t h a i f u t u r e ooera t ions shal l be m f u l l comp l i ance w i t h ' the i r - r m a n d c e n d m o n s o l th i s p e r m i t ; o r 121 w i i n . n the t l c e s a - C 3 0 - d a v p e n o d . ihe p e - m u t c * l e o u e t t i i ha i a p u b l * hear ing b* he l d to present o ra l and w r i t t e n ev idence c o n c e m m c the proposed m o f l i l i e n . o " . t u s o e n s o n or r e v o c a t i o n . The c o n d u c t of th is hear ing and ihe p r o c e d u r e s l o r m a k i n g a f i n a l dec is ion ei ther to m o d i f y , suspend o» ievok > ' h n n . i in w h o i e or in p a r t shall be pu rsuan t to procedures p rescr ibed by the Chief of Engineers .

I. T h a t m n i u m c th is p e r m i t , the > . - " l e n t has re l i ed cm the - n f o r m a t i o n and data w h i c h ihe p e r m u t e * has p r o v i d r o m c o n n e c t i o n w i l h h i t p e r m i t app -cat ion If , t u b s i j u e n i to the .• j n c » i f tn i s p e r m i t , such i n l o r m a t i o n and data prove to be la ise. i n c o m p l e t e pr inaccura te , th is p e r m i t m a y be m o d i l i e d . suspendec -eve • - m w h o l e or in p a n . e n d / o - i h t G o v e r n m e n t may , ir. a d d i t i o n , i n s t i t u t e app rop r i a te legal p roceed ings .

m . T h a i any m o d i f i c a t i o n , s- n o n . o ' e v o u - o n o f th i s p e r m i * »haH n o t be thr basis l o ' any c l a im t o ' damages e c a n t i t h * U n u e d States.

- That the p e r m i t t e e sh*n - - n l y n , r , , , , C I F n g i n e t ' hat l i m e .he a, ry e u t n o r i t e d here in w i l l be c o m m e n c e d , at far m aevanct Of l h * t i m * o f c o m m * r - ant as t h * i «g -ee- T.« s p e c i f y , a n j o l e-> -uspens ion o f w o r k , if for a p e n o d o t m o r e than c e w e e * , r e s u m p t i o n of w o r k * n c -is c o m n i e n o v

0. Thai .1 jhe activity authorized herein i i not started on or before day o l . 19 _ _ _ _ _ _ •on* yea* dam the date o l issuance of thn permit unlets otherwise specified) and is not completed on or be Iorr ^ h •< T r y — f S r c r day of M a r c h 19 9 0 Ithree yean from t h * dete o l issuance of thn permit unless otherwise spec I tied I this permit, if not previously revoked or specifically extended, shall automatically expire.

p. Thai this permi : does no t au thorn* or approv* th * construction of particular structures, t h * authorization or approval of which may require authorization bv the Conor ess or other agencies of the Federal Government.

q. That i l and wh*r. the permitte* desires 10 abandon the activity authorized herein, unlets'such abandonment is part of a transfer procedure by which the permit ler is transferring his interests herein t o a third party pursuant to General Condition t hereof, he must restore the area to a condi t ion satisfactory to the District Engineer.

r. That if t h * recording of this permit is possible un<s*r applicable State or local law. the permittee snail take such action as may be necessary to record this permit w i th th * Register ol Deeds or other appropriate official charged w i th the responsibility for maintaining records ol title to and interests in real property.

!•>* s That there thall be no unreasonable inter I erence with navigation by the existence or us* of t h * activity authorized herein.

1. That this permit may not be transferred to a third peny without r " o r writ ie -o t ic* 10 t h * District Engineer, either by the wantleree's written agreement to comply with all terms and conditions of this permit or by the transler sie vubsc-ioing 10 this permit in th* space provided below and thereby agreeing 10 comply witn all terms and conditions o< this permit. In addition, if t h * permittee transfers ihe interests authorized herein by conveyance of realty, the deed shall re'erence this permit and th* terms and conditions spec 1 lied herein and ihis permit shall bs reco>3ed along with t h * o«*c with th * Register ol Deeds or other appropriate official.

I I . Specu' Conditions: I Here list canditiont relating specifically to t h t proposed structure or work authorized by this permit):

u. The loca cion and plans of all structures or work au??orized by this permit shall le submitted to and approved by the District Engineer, Corps of Engineers, OS Army, in chaxze of the area in vhich the work is located before work thereon is cc <&&&C**~~

v. The s t ruc tures and other work authorized herein are included i n the coverage of the blanket bond dated i November 1972 in. the penal sum of One Hundred Thousand Dollars ($100,000), heretofore furnished by the permittee *od approved by tbe Departnent of the Army 16 November 1972 to insure compliance w i t h a l l the conditions of the permit .

v . I f , i n the judgment of the Chief of Engineers, the said permittee does not at a l l times exercise due caution i n the handling of o i l , gas, or other po l lu t ive , noxious, or l e t h a l substances to prevent condit ions deleterious to health or seafood, or hazardous to navigat ion, or d--.ugerous to persons or property engaged i n commerce or otherwise on s?iu waters, or f a i l s on d_and to i._ove promptly any structure or structures or parts thereof , no longer used /or the purpose f o r which they are constructed, t h i s permit may be revoked and a l l operations authorized by i t may be terminated.

x . This au thor iza t ion i s wholly unconnected and unconcerned v i t h the ownership of or r i g h t s i n the underlying s o i l and creates no property r i g h t s .

y. Fog signals as may be prescribed by the United States Coast Guard shal l be i n s t a l l e d and maintained by and at the expense of the owner.

T n t lo- .owing Special C o n d m o n i w i l l be appl icable w h e n a p c o p n a t . . :

S T R U C T U R E S I N O R A F F E C T I N G N A V I G A B L E V A T E R S O F T H E U N I T E D S T A T E S : • a. Thai t h u p e r m i t does n o t a u t h o r i re t l x m t e r t V e n c e w i t ' a n y ex i s t i ng o r p roposed Federa l p r o j e c l and t h a t ttsc p e r m i t t e e t h a l l n o t pe ent i t led to c o m p e n s a t i o n l o r ca rnage o r in ju ry t o t h e s t ruc tu res or w o r k au tho r i zed here in w h i c h m a y be- caused b y o r result I r o m eaist ing or fu ture o p e r a t i o n s u n d e r t a k e n b y t h t U n i t e d States i n t h e p u b l ' : in te res t .

b. That no a t t e m p t sha l l b e m a d e b y the permi t tee t o p r e v e n t the f u l l a n d f ree use by the p u b l i c of al l navigable wa te rs at o r ad jacent

101he act iv i ty a u t h o r i z e d b y t h i s p e r m i t .

C. That i l t he d iso tay o f l i g h t s a n d signals on any str . t u r e or w o r k a u t h o r i s e d here in is n o t o t h e r w i s e p r o v i d e d for by l e w . such l ights and ngned as m a y b e p r e s c r i b e d by th? U m t e d States Coast G u a r d shal l be insta l led and m a i n t a i n e d b v a n j at t h e expense o f t h e permit tee

d . That the p e r m i t t e e , u p o n rece.pt of a n o n c e of r e v o c a t i o n o f th i s p e r m i t or u p o n its e x p i r a t i o n be fo re c o m p l e t i o n o f t h e author ised s t ruc ture or w o r k , s h a l l , w i t h o u t expense t o the U n i t e d States a n d in such t i m e and m a n n t t as t h e Secretary o l t. • A r m y or his au thonred rep resen ta t i ve m a y d i r e c t , restore the w a t e r w a y t o i ts f o r m e r c o n d i t i o n s . If the p e r m i t t e e fai ls t o c o m p l y w i t h t h e d i rect ion o< the Secre ta ry o f t h e A r m y or h n au tho r i sed represen ta t i ve , t h e Secretary o>" h i t designee m a y res tore the w a t e r w a y t o i ts former c o n d i t i o n , b y c o n t r a c t o r o t h e r w i s e , and recover the cos t the reo f n o m the p e r m i t t e e .

c. Strt-ciures (or S m a l l B o a t s : T h a t pe im i t t ee hereby recognises the poss ib i l i t y tha t the s t r u c t u r e p e r m i t t e d he re in may be sub jec t t o Damage by wave wash f r o m pass ing vessels. The issuance o l t h i t p e r m i t docs not i t i i eve t h e p e r m i t t e e I r o m t a k i n g al l p roper steps t o enure the in tegr i ty of t h e s t r u c t u r e p e r m i t t e d here in anc 4 t h e sa le ty o f boa ts m o o r e d m e r e i o f r o m damage b y wave wash a n d t h e permi t tee than r.ot h o l d t h e U n i t e d States l iable for any such damage .

M A I N T E N A N C E D R E D G I N G :

a. That when the w o r k a u t h o r is here in inc ludes p e r i o d i c n tenance d redg ing , i t may b e p a r l o r m e d under th is p e r m i t for «»••—. t r o m t h e d a t e of issuance of t h i : :: ! : : . - , un le ts o the rw ise i n d i c a t e d ) :

b. That the 'Permi t tee w i l t adv ise t h e D is t r i c t Engineer m w r i t i n g at least t w o weeks b e f o r e he i n t e n d s t o u n d e r t a k e any ma in tenance d r tugmg.

D ISCHARGES OF D R E D G E D O R F I L L M A T E R I A L I N T O W A T E R S O F T H E U N I T E D S T A T E S :

a. Thai the d ischarge w i l l b e c a r r i e d o u t in c o n f o r m i t y w i t h the goals a n d object ives of the E P A Gu ide l i nes establ ished pu rsuan t t o Section « 0 4 ( b l 0 f t he FVVPCA a n d p u b l i s h e d in 4 0 C F R 2 3 0 :

b. Tha*. me d ischarge w i l l cons i s t n f sui table ma tena l f ree f r o m t o x i c p o l l u t a n t s in o the r t h a n t race q u a n t i t i e s :

e. That the l i l i c r u t e d b y t h e d ischarge w i l l be p i o p e r l y m a i n t a i n e d t o p revent e ros ion a n d o t h e r n o n - p o i n t sources o l p o l l u t i o n ; a n d

d . That t'-e J ischarge w i l l n o t o c c u r in a componen t of the N a t i o n a l W i l d and Scenic R iver S y s t e m r r i n a c o m p o n e n t o l a Sta-.e w i l d a n d scenic river s y s t e m .

DUMPING OF D R E D G E D M A T E R I A L I N T O O C E A N W A T E R S : t . That the d u m p i n g w i l l b e c a r r i e d out in c o n f o r m i t y w i t h ihe goals, ob iecnves . and r e c u i r e m e n t s o f the E r A erne; .a es tab l ished

Pu 'sua i t t o Sec t ion 1 0 2 o f t h e M a r m e P ro tec t i on . Research a n d Sanctuar ies A c t o l 1972 . p u b l i s h e d m 4 0 C F R 2 2 0 - 2 2 8 .

b. T h a : i h t p e r m i t t e e sha l l p l a c e a c u p y of ih is p e r m i t i n a consp i cuous place m the vessel t o be used l o r the t ' . n s p o ' t a t i o . - i s n d / o r dumping o l the d redged m a t e r i a l as a u t h o r i s e d here in .

Th is permit shall b e c o m e e f f e c t i v e o n the date of ihe D i s t r i c t Eng ineer 's s igna tu re .

Permni-e hereby accepts a n d agrees l o c o m p ' y w i t h ihe terms a n d c o n d i t i o n s o l th is p e r m i t .

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GEOLOGICAL SLRVEY

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Z * T Z l ! . ; 5 N C i . J I . V 4 t t w . C

• O ' S O * ? B 4 4

M E T A I R l E . L O U I S I A N A 7 0 0 1 0

In Reply Refer To: OS-7-1 MAR 28 1280

ARCO Oil and Gas Company Attention: Mr. Jerry W. Schmidt Post Office Box 51408, OCS Lafayette, Louisiana 70505

Gentlemen: 03**%

On December 11, 1979, you submitted to this office an Exploration Plan for wells Nos. 1 a •^^ t ^rzw^- ICS-G 4133, Block. 863, Viosca Knoll Area. Approval of ".his Exploration Plan, as amended on February 5, 1980, is hereby granted pursuant to 30 CTR 250.34.

Please be reminded that any future OCS activity within an area adjacent to a state and/or any OCS activity that would terminate within, or transverse the uoundry of a state with an approved Coastal Zone Management Prcgram w i l l require a Coastal Zone Consistency Certification and Environmental Report ( i f required) to be included with the plan for the proposed activity when submitted to this office.

The purpose of this letter is to communicate to you the above approval. How­ever, this is not final approval to d r i l l the wells. Approval of the respective applications to d r i l l , when submitted, is the responsibility of the District Supervisor, Metairie District.

Sincerely yours,

D. W. Solanas Oil and Gas Supervisor Operations Support Gulf of Mexico Area

ARCO Oil end C M Company South Louisiana District Post Office B~A SI«"•»•. Oil Cantar Lafayette, Louisiar -505 Telaphona 318 264 4000

J. R. Pollock Offshore District Engineer

March 13, 1981

U.S. Geological Survey ^ e ^ f W I ^ ^ P. 0. Box 7944 ^ ^ J Metairie, La. 70010

Re: Viosc Knoll Block 863, Supplemental Exploration Plan Envir amenta 1 Report

Dear Sir,

The attached Evironmental Report replaces the previous report submitted with the last POE supplement. Minor changes have been made to reflect current data on associated a c t i v i t y in the proposed area.

Please replace any remaining copies on f i l e with this revised edition.

Sincerely,

W. A. DeShazer EFD/la

attachments

ARCO Oil • >o C M C I » » » I •• • Di««-o<< ot atlaMh » i t » i »MCompt " )

ARCO OU and Gat Company South Louisiana Districl Post Office Box 5140C, Oil Center Station .afayette, Louisiana 70505 Telephone 318 264 4000

March 13, 1981

Department of Natural Resources Office of Coastal Zone Management P. 0. Box 44066 Baton Rouge, La. 70PJ4

Re: Viob- r Knoll - ck 863, Supplemental Exploration Plan Environmt--' - 1 "•—•ort

Dear Sir ,

The attached Environmental Report replaces the previous ?-port submitted with the last POE suptlement. Minor changes have been aaa. to reflect current data on associated a c t i v i t y in the proposed area.

Please replace any remaining copies on f i l e with this revised edition.

Sincerely

W. A. DeShazer EFD/la

attachments

A R C O OM O l d C M C o n p i n i i l • D.••».(>» o> A I U ' I ' C R i c h l . » m C o m p » i v

COASTAL ZONE MANAGEMENT

CONSISTENCY CERTIFICATION

SUPPLEMENTAL EXPLORATION PTJffl Type o f Plan

Viosca Knol l Block 863 4*

- -~

Area and Block

OCS-G-4133 Lease Number

The proposed a c t i v i t i e s described i n d e t a i l i n t h i s Plan comply

w i t h Alabama and Louisiana's approved Coastal Management

P-ogram(s) and w i l l be conducted i n a manner c o n s i s t e d v i t h

such Program(s) .

Atlant ic R ichf i e ld Ccnvpan ;

Lessee or Operator

C e r t i f y i n g O f f i c i a l

Date

T L A ^ ^ U C a i l B L I , COMPANY

' RE PORT

SUMMARY OF OPERATIONS

A t l a n t i c R i c h f i e l d Company submit : 3 an e x p l o r a t i o n plan f o r Viosca K n o l l 863, OCS-G 4133 i n December, 1979 which was p r i o r to the e f f e c t i v e date of oune 2, 1980 r e q u i r i n g the submibsion o f a i r emissions data as par t of the e x p l o r a t i o n p l a n . As a r e s u l t of necessary m o d i f i c a t i o n s i n the p l a n , which includes the d r i l l i n g o f poss ib ly as many as 8 a d d i t i o n a l wel l - ; .nd the subsequent changes of l o c a t i o n w i t h i n the b l o c k , t h i s a i r emissions daca repor t is hereby being submitted by request o f USGS under 30CFR Part 250 .5 / .

The l o c a t i o n of Well #1 i s 42.5 m i l e s from shore or 85.47 miles S 0 4 < W 3 3 " W o f USC & GS Mon. "Coden". As the f i n a l l o c a t i o n o f subsequent wel ls may change, and since most w i l l l i k e l y be w i t h i n the 42.5 i t i l e range, we have used t h i s f i g u r e f o r our c a l c u l a t i o n .

A semi-submersible type r i g , the A l e u t i a n key, is being used to d r i l l these we l l s as Che depth is some 1068 fee t of water . A l i s t o f equipment associated w i t h t h i s t y p i c a l d i e s e l - e l e c t r i c r i g is at tached. Based or. ava i lab le ac tual oower/time use data from a n a t u r a l gas - fue led r i g o f comparative c a p a b i l i t y , equiva len t t o t a l load usage f o r the prime movers has been assumed.

Page 2.

AIR EMISSIONS DATA

Ex a p t i o n Formulas:

i i ) 33.3 D, aach, fo r N0 X , S 0 2 , TSP, VOC

(2 . 3400 D 2 /3 f o r CC.

Where ' a d i s tance from shore d e f i n e d aa landward o f the mean high wat*. mark

Maximum Allowables

(1) 33.3 x 16 - 322.8 tons/year each of N0 X , S 0 : , TSP, VOC,

(2) 3400 x 16 2/3 • 21,590.65 tons/year for CO. *

Dieacl Tank VOC Emission Forr-ale*

Lg • 2 .21 x l 0

W M ( - j j ! ? ; r ) 0 - M D 1 " I 0 " 5 1 F r CK c

where, Lg - Fixed roof brea th ing loss ( l b / d a y ) .

M • Molecular weight of vapor i n storage tank ( l b / l b mole) .

P. • True vapor pressure at bulk l i q u i d cond i t ions

D - Tank diameter ( f t ) .

H • Average vapor space h e i g h t , i n c l u d i n g roo f volume co r r ec t ion ( f t )

T • Average ambient temperature change from day to n igh t ( ° F ) .

F . = Paint f a c to r (dimension I ess ) .

C p " Crude o i l f ac to r (dimensi- • >ss)

Note : (1) The vapor space L.. a cone rcof is equiva len t i n volume to a cy l inder which has ch* r»".z base diameter as the cone and is one - th i rd the he ignt of the cone.

(2) K c •* (0.65) f o r crude o i l , K c • ( 1 . 0 ) f o r gasoline and a l l other l i q u i d s .

Fuel : No. 2 d i e s e l .

TYPICAL SELF-CONTAINED DRILLING RIG EQUIPMENT

T y p i c a l Natural Gas-Fueled Engines:

1 . Prime Movers - T o t a l o f four V-16 C a t e r p i l l a r G-399 n a t u r a l gas engines a v a i l a b l e ; three are u s u a l l y rn opera t ion and one i s a back-up.

Each ra ted at 930 continuous bhp at 1200 rpm

Based on 80% s i t e e f f i c i e n c y and from a v a i l a b l e power/ t ime use data on :Viis type r i g , ac tua l t o t i l load usage f o r prime movers i s 1366.5 hp /h r .

2 . Cementing U n i t - a) Two General Motors 8V-71 d i e s e l pumps ra ted at 335 bhp, 230 continuous bhp. Average o f 52 ac tua l use.

b) One General Motors 3-71 d i e s e l cement mixer rated at 90 bhp, 67 continuous bhp. Average o f 52 ac tua l use.

3 . Cranes - Two D e t r o i t d iese l 4-71"s ra ted at 131 bhp, 93 continuous bhp. Normally only one crane operates at a t ime , averaging 302 ac tua l use o f one engine.

4 . Emergency Generator - One C a t e r p i l l a r D-379 V-8 d i e s e l

715 continuous bhp at 1300 rpm

Emergency back-up use on ly - not f i g u r e d i n emission t o t a l s .

T y p i c a l Equivalent D i e s e l - E l e c t r i c Rig Engines

1 . Prime Movers - T o t a l o f four General Motors EMD 16-645 E-8 engines avai lable to d r i v e generators; two or three normally i n opera t ion and one i s a b » c k - u p .

1950 continuous bhp each.

For a t y p i c a l d iese l e l e c t r i c r i g w i t h equivalent c a p a b i l i t i e s of the n a t u r a l qas fueled r i g above, an equ iva len t average t o t a l load usage of 1366.5 hp /h r . should be assumed.

2. Cementing Unit - a) Two General Motors 8V-7i V-8 d i e s e l pumps ra ted at 335 bhp, 230 continuous bhp (average of 52 ac tua l use ) .

b) One General Motors 3-71 d i e s e l cement mixer ta ted at 90 bhp, 6? continuous bhp. Average of 52 ac tua l use.

3. Cranes - Two Detroit diesel -.-7":'8 rated at 131 bhp, 93 continuous bhp. Normally only one crane operates at a time, averaging 302 actual use of ont engine.

Page 4.

DIESEL-POWERED INTERNAL COMBUSTION ENGINE

PARAMETER EPA'S AP-42 EMISSION FACTORS (TABLE 3 .3 .3 -1 )

g /hp-hr . #/hp-hr

NO, 14 .030837

CO 3.03 .006674

S02 -931 .0020507

TSP 1.0 # .0022026

THC 1.12 .002467

NOTE: VOC emissions f r n n a 200 b b l . a i e se l tank are n e g l i g i b l e

- 2.21 x IO - 4 (13C) (.0081384) (11.004335) •' 1) (A.472136) (1.58) (.18) (10)

- .0032725 #/day

or 1.1945#/ ear

NATURAL GAS-FUELED

INTERNAL COMBUSTION ENGINE TURBINE ENGINE (//IOOO HP-HR) ( » / 1 0 0 0 HP-HR)

EPA:8 AP-42 EPA's AP-42 Emission Factors Emission Factors

NO* 24 NOx 2.9

CO 3.1 CO l . l

S0 2 .004 S0 2 .004

TSP - TSP

*TuC 9.7 *THC .2

*Total Hydrocarbons (THC) as methane and non-methane.

TOTAL EXPECTED EMISSIONS

Typical Natural Gas Fueled Rig and Platform Equipment

ENGINE AVG. POWER (hp/hr)

EMISSION TOTALS (tona /yr) AVG. POWER (hp/hr) NO, CO 'SO? TSP THC

1366.5 143.65 18.55 - - _ ___ 58.066

(715) (96.61) (20.91) ( 41) (6.91) (7.71) 11.5 1.55 .31 .11 .11 .11 3 .32 .10 .03 .C3 .04 28 3.88 .80 .25 .27 .30 (28) 3.78 (.80) (.25) (.27) (.30) 1000 12.70 4.82) .88

(335) (45.25) (9.7S) (3.01) (3.23) (3.62) 43 5.81 1.26 .39 .41 .46

(335) (45.25) (9.89) (3.01) (3.23) (3.62)

TOTALS 167.81 25.84 .78 .82 59.85

2 Prime movers Rig emergency gen. Cement unit Cement mixer Crane

3 Crane 2 P l a t f o r m gen. 3 F i r e pump

Pump down pump 3 E r e r g . gen.

Typ ica l D i e s e l - E l e c t r i c Rig and P la t fo rm Equipment

ENGINE

Prime mo -e-Cement v •r Cemen' T ver Crane

3 Cran« ^ P l a t f o r m generator 3 F i r e pump

Pump down pump 3Emerg. gen.

Avg.Power Usage(hpZhr)

1366.5 11.5

3 28

(28) 1000

(335) 43

(335)

TOTALS

NO, EMISSION TOTALS ( tons /year )

184.5 7 1.61

.41 3.78

(3 .78) 12.70

(45.25) 5.81

(43.25)

208.88

CO

39.95 .31 .09 .82

( .32) 4.82

(9.79 1.26

(9 .79)

47.25

rscb TSF THC

12.27 13.18 14.77 .11 .11 .11 .03 .03 .03 .25 .27 .30

(.25) (.27) (.30) .88

(3.01) (3.23 i (3.h?.« .39 ,u; J,f,

(3.01) U '3) (Vr.:.)

13. r * | 16

1 Ana lys i s u* >>>• ,as ind ica tes no s u l f u r conten t . 2 Natura l -gas t . e< < •• .nes - • se na tu ra l gas emission fac to r s in cacu l a t i ons . " These e n g i n e n< t l l y never used, so not included in t o t a l s .

Page 6.

B O I L E R

BOP C O N T R O L

R O O M

ENGINE ROOM

MUO PIT ROOM

QUARTERS

MUD PUMP ROOM

WAREHOUSE

\

M I S S I S S I P P I C A N Y O N A R E A G U L F OF M E X I C O

P P ' i C A T I O . J B Y A U A I . T I C " I C H F ; ; l . D CO

, ° : P L A N V IEW ^ . 1 S 6 0 L A F A Y E T T E . L A .

ENVIRONMENTAL REPORT

Supplemental Exploration Plan

aca Knoll

Block 663 (Tract 104)

At lant ic Richf ie ld Company

3/13/81

Earl F. Dauterive

P. 0. Box 5!

Lafayette, Lou: s

DESCRIPTION OF THE PROPOSED ACTION

r.« T r a n p o r t a t i o n v i l l inc lude boats and h e l i c o p t e r s . Personnel t ranspor t i s done almost e x c l u s i v e l y by h e l i c o p t e r . One l a r g e , and one small h e l i c o p t e r w i l l v i s i t the r i g d a i l y . Crewboats (100 ' ) u s u a l l y make about three runs I r week, whi le workboats (165*) make an average of f i v e runs per week d u r i n g d r i l l i n g . (See FEIS Lease Sale 58, Volume 1, pp. I I I - 9 , 10)

b . The base of operat ion f o r al?. o f f s h o r e a c t i v i t y out o f t h i s d i s t r i c t i s i n Ven ice , Louis iana . Suppl ies , personnel, and t r a f f i c movements are c o n t r o l l e d from here w i t h coo rd ina t ion from the s t a f f o f the D i s t r i c t O f f i c e i n L a f a y e t t e . A new base is now under c o n s t r u c t i o n d i r e c t l y across the road from our present base to complement the present f a c i l i t i e s . Attachment A is an area map uf the base l o c a t i o n . (See FEIS lease Sale 58 Volume 1, pp. I I I - 7 , 8, 90)

c. The new base, to be completed by the summer of 1981, w i l l provide f o r adequate pa rk ing , he l ipad w i t h w a i t i n g room, ample warehouse space and o f f i c e area, and g r e a t l y needed dock space for the boa ts . Attachment. B shows a layout of these r a c i l i i t e s .

d . Not a p p l i c a b l e

e. Attachment C shows the l o c a t i o n of th* proposed a c t i v i t y i n r e l a t i o n to both Lou i s i ana and Alabama. B l o r \ 863 is w i t h i n ;he boundary o f Alabama and the base of operat ions is i n Louis iana .

DESCRIPTION OF THE AFFECTED ENVIRONMENT AND IMPACTS

A. Phys ica l and Environmental

1) Commercial F i s h i n g

There is considerable evidence that o i l and gas operations have a favorable impact on f i s h a c t i v i t i e s since s t ruc tu res act as breeding g -iunds and a r t i f i c i a l r ee f s . No long term adverse e f f e c t i s expected as a r e su l t of these development a c t i v i t i e s .

St ructures can i n t e r f e r e » l en conmercial f i s h i n g by removing t r a w l i n g and puree se in ing areas. However, on a t o t a l areal basis the i n t e r f e r e n c e is m i n i m a l . Apprc i ~ ' t e l y 70% o f the catch by these two methods i n the Gul f o f Mexico is shoreward € : the 20m i soba th . The remainder of the catch by these methods is concentrated between the 20m and 200m isobath w i t h only nominal e f f o r t expended beyond these depths.See-Final Environmental Impact Statement, 1979 OCS O i l and Gas Lease ^>ale 58, Western and Central Gulf o f Mexico.

Desc r ip t ion - Volume I , pp. I I 220-231 FEIS Lease Sale 36, 1974 Volume I , pp. I I 272-277, (G-6) FEIS Lease Sale 41 1976 Volume I , pp. I I 36,37,38 (Table I I - 4 ) FEIS Lease Sale 58

IMPACT - Volume I , ^p I I I 18 , 1 9 , 3 9 , 4 0 , 4 i , V-2 (E) Pages 156-169 o f FEIS Lease Sale 2*> and pages 423-435 of FEIS Lease Sale 41 address var ious impacts on commercial f i s h i n g :

1 . Removal of sea f l o o r from use - vessels must mainta in safe distances around s t ructures r e s u l t i n g ir . a loss of on ly 0.2Z (10 acres) o f sea f l o o r per developed t r a c t .

2 . Structures a t t r a c t large numbers o f f i s h which can r e s u l t i n both negative and p o s i t i v e e f f e c t s .

3. Possible adverse e f f e c t s to commercial f i s h i n g vessels and equipment could r e s u l t from large pieces of debris or unburied p i p e l i n e s . However, Fisherman's Gear Compensation Fund provides means to recover damages. Money fo r t h i s fund comes from assessments on a l l operators i n the G u l f . Futhermore, new U.S.G.S. r e g u l a t i o n s require the marking of a l l equipment and supplies f o r purposes of i d e n t i f y i n g " los t" objects which may cause such damage.

U. In an area o f ar c i l s p i l l , commercial f i s h i n g a c t i v i t i e s are i n h i b i t e d i n ordar to avoid contaminat ion of f i s h i n g equipraent, vessels ano ca tch . However, the frequency and magnitude of such s p i l l s is m i n i m a l . Supporting t h i s , Mertens (1973) r e f e r s to Environmental Impact Statement Hear ing, August, 1972. "Despite-the presence o f t'-e o i l indus t ry i n t h i s area, the f i s h i n g catch has r i s e n markedly i n that period and present ly is greater than any other f i s h i n g i n the United S ta tes . " IFEIS Lease Sale 36, Vol I I pp. 168-169) .

5. While Louis iana was leading the n a t i o n i n n a t u r a l & s p roduct ion and running second behind Texas i n o i l product ion i n 1979, i t also ranked number one i n marine f i s h e r i e s . The va?-* of marine f i s h e r i e s products i n the dtate vns o.'er $100 m i l l i o n , more than doubl ing the lumber two s t a t e , Maine, w i t h $45 m i l l i o n , and numbsr three C a l i f o r n i a v i t h $27.7 m i l l i o n . (See Louis iana Petioleum Hews V o l . X V I , No. 1 p . 2 , February 1981)

2) Shipping v t r a n s i t lane3, anchorage areas, f a i r ' - a y s , e t c . )

Ship T r a f f i c and Nav iga t ion

I n the G u , f of Mexico sa fe ty fa i rways have been est at 1:shed f o r the s i f e passage o i vessels enroute to or f rom U.S. p o r t s . ' ' isequently, placement of r i g s or p la t fo-ms are p r o h i b i t e d w i t h i e f a i rways .

Ships o f course do not always use these fa i rways • ' ' i s increases the p o s s i b i l i t y o f a c o l l i s i o n wi th d r i l l i n g u 6 ; , per .et.t p l a t f o r m s , or vesse l" a t tending these p l a t f o r m s . The most serious environmental hazaru ' v o l v i n g o f f s h o r e s t ruc tures and shipping could occur i n the case of an o tanker c o l l i d i n g wi th a p l a t f o r m . •> minimise the chance of t h i s type of a c i d e n t , n a v i g a t i o n a l aids such as fog horns and beacons are i n s ^ a l l e c on o f f s h o r e p l a t >rms as per U.S. Coast Guard r e g u l a t i o n s .

S ta t ionary o f f s h o r e s t ruc tu res such as r i g s and p la t forms may f u n c t i o n as navigar. ioual aids f o r bmall boat opera tors , and thus have a b e n e f i c i a l impact. Also i n L o u i s i i . M . l i v e s have been paved by the presence of o f f s h o r e p l a t fo rms when pleasure boat crews nd passengers were forced to abandon t h e i r c r a f t dur ing storms or l o v i n g boat accidents .

Desc r i p t i on - FEIS Lease Sale 58, V o l . I , p p . I l l - 41,43 and p. V-2 (F) FEIS Lease Sale 4 1 , V o l . I , p. I I - 266 (G-4) •EIS Lease SAle 16, V o l . I I , p. I - 301, (G-4)

Jmpa_t_ - FEIS Lease Sale 4 1 , V o l . I , pp. I I I - 4 4 9 , (D) FEIS Lease Sale 3o, V o l . I I , p c IV - 181 (F)

Note: Minimal P > t e n t i a l Impact (See Appendix E, Tcble E - l , p.77,83 of FEIS Lease Sale 58, 1979

Small C r a f t Pleasure Boat ing, Snort F i sh ing and Recreation

Offshore minera l development i n the past 25 years has le 'o the e r e c t i o n of over 1000 major p la t forms i n thr- Gulf of M , most o f which are i n the c e n t r a l Gulf o f f the coas; Louis ia Some areas have become wide ly recognized over tht ars as ha mg a specia l i n t e r e s t t o f ishermen, scuba d ive r s and marine re archers because they serve as bree. mg grounds and a r t i f i c i a l r e e l s . Now most o f the o f f s h o r e f i s h i n g i n the c e n t r a l aid western G u l f , except b i g game f i s h i n g , i s focused around petroleum s t ructures and designated a r t i f i c i a l r e e f s .

Extensive test imony and evidence has been r ece i \ that o v e r a l l o i l and gas o^^.rations heve a favorable impact on sport f i s h i - g a c t i v i t i e s . The f avo tab le impact is thC r e s u l t of sport f i s h popula t ion enhancement due to the a r t i f i c i a l reef e f f e c t o f o f f s h o r e p l a t f o r m s . I n the open sea, o f f sho re p la t forms provide both food ant* cover- i n areas that ere l a rge ly devoid of these e s sen t i a l* . The average p l ? : f o r m i n 150 fee t of water provides 90,000 square fee t of hard surface f o r encrus t ing organisms. [FEIS Lease Sale 36, V o l . I I , p . 1891

Descr ip t ion - Volume i , pp. I I - 53, 54 (Table I I - 7 ) , 55

Impact - Volume I I pp. IV - 189, (H-5)

Volume I pp. I l l - 33,34,35,36

C u l t u r a l Resources - Known Archaeological and H i s t o r i c Area

See FEIS Lease Sales 36 and 58

Descr ip t ion - Volume 1, pp. I I - 55, 56, 57 FEIS Lease Sale 58, 1979 Volme I I , Visuals 1 and 4 pp. FEIS Lease Sale 58, 1979

Iapact - Volume I I , p. IV - 187 ( H - 3 ) , FEIS Lease Sale 36 Volume I , p . 463 ( I . ) , FEIS Lease Sale 41 Volume I , p . I l l •- 38

p . V - 3 (G) .

E c o l o g i c a l l y Sens i t ive Features

The lease area i« not loca ted i n or near an area o f b i o l o g i c a l s i g n i f i c a n c e .

See FEIS Lease Sale 58

D e s c r i p t i o n - Volume I , pp. I I - 41,42,43,44,45,46 (Figure 11-20)

Iapact - Volume I , pp. I l l - 3,22,25

Note: Minimal P o t e n t i a l Impact

Al though communities o f anemones, l impe t s , mo l lusks , barnacles tnd o ther forms of mar ine /es tuar ine l i f e vhich a t tach themselves to the subs t ra te are p r o l i f i c i n C a l i f o r n i a and New England, tew of these animals have a wide d i s t r i b u t i o n i r . Louisiana because of the

redominant ly s o f t - s u b s t r a t e beaches of the S ta t e . Those i nve r t eb ra t e sess i l e organisms which do colonize the j e t t i e s o f the M i s s i s s i p p i River are l a r g e l y protected from contact wi th o i l r e s u l t i n g from a s p i l l due to the gulfward movements of the r i v e r . (FEIS Lease .Sale 36 V o l . I I , pp. 146-147 ( C - 4 ) ] .

Socio - Economic

Pending f i n a l i z e d r epor t by the USGS and the states on or before January 3 1 , 1981.

To be submitted by A p r i l , 1981 and ry 6 months t h e r e a f t e r .

UNAVOIDABLE ADVERSE IMPACTS

(See FEIS Lease Sale 58, Volume I , pp. V - 1,2,3)

(See FEIS Lease Sale 36, V o l . I I , pp. V I - 281-291)

(See FEIS Lease Sale 4 1 , V o l . I I , pp. V - 565-576)

Summary - A l l unavoidable adverse impacts Lhat w i l l be sustained by the i.<«tural environment as a r e s u l t of "-outin* oper?t ions w i l l bf: r e l a t i v e l y l o c a l i z e d i n t h e i r e f f e c t s . Many w i l l be fo l lowed b / unhindered n a t u r a l recovery w i t h i n r e l a t i v e l y sho r t - t ime per iods . A massive acc iden ta l o i l s p i l l could r e s u l t i n shor t - t e rm severe and widespread damage of major consequence. A l l of the t r a c t s i d e n t i f i e d f o r o i l and gas product ion i n t h i s proposed sale do ' con ta in va ry ing degrees and types of adverse impact p o t e n t i a l s but only a massive o i l s p i l l accident could r e s u l t i n s i g n i f i c a n t adverse impacts. However, the p r o b a b i l i t y that such a massive s p i l l w i l l occur is very low.

The proposed ac t iv i ty w i l l be carried out and completed with the guarantee of the fo l lowing items:

1. The best available and safest technologies w i l l be u t i l i zed throughout the project . This includes meeting a l l applicable requirements fo r equipment types, general project layout, safety systems, and equipment and monitoring systems.

2. A l l operations w i l l be covered by a USGS approved o i l s p i l l contingency plan.

3 . A l l applicable Federal, State, and local requirements regarding air emission and water qual i ty and discharge for the proposed a c t i v i t i e s , as well as any other permit conditions, w i l l be complied wi th .

References

i . E o v i r o , » » t . l S t . t « - n t . OCS U ~ S . I . 58. 1979

2 E . v i r » « n t . l I » P « t S c . t « . n t , OCS U . . . S.U 36. 1974

3 E „ v i r o n » . n t . l I . p . c t S t . t ~ . n c , OCS U . . . S . L 41 . 1*76

E n v i r o n e d Protection A s - , . .977. E . U . i o n O.C..

. . .nov 1977. > | i l i r r J - t r o . Of f .no r . 5. Environm.nc.l Procccion A*«ncy, E

M l .nd C . C v - ' - l ' " n 6 reduct ion. . ^

u . i . i » . * « . . « - — • l 9 8 1 - V o U m ' * • l '

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VENICE, LOUISIANA

LOUISIANA ENVIRONMENTAL CONTROL AREA

GENERAL LOCATION MAP

US Diporlm»nt of Commnrtr Nolionol Oc»on S-rv»y Mop No. 11561

Scoll in F««t

IOOO 2 0 0 0

ARCO OIL AND GAS COMPANY

PROPOSED ARCO OIL AND GAS COMPANY DREDGE, FILL, AND BULKHEAD CONSTRUCTION

In: McDERMOTT CANAL NO. 2 At: PLAQUEMINES PARISH Stc«»: LOUISIANA

SHEET I OF 4 Dot*: NOV. 2, 1979

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ARCO OIL & GAS C O .

V E N I C E B A S E

NOT TO SCALE

N O V .. 1 9 8 0

Attachment "C"

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ARCO Oil and Oat Company South Louisiana District Post Office Box 51408. Oil Cenler Lafsyette. Louisiana ''0505 Telephone 316 264 4000

J . R. Pollock Offshore District Engineer

A p r i l 7, 1981

U.S. Geological Survey P. O. Box 7944 Metairie, La. 70010

Re: OS-7, Viosca Knoll Area, Block 863, OCS-G 4133

Dear Sir,

Enclosed i s the supplemental information as requested f o r the above referenced Environmental Report. We anticipate spudding of the #3 w e l l as early as the f i r s t week of May.

Your timely review would be most appreciated.

For further information please contact Mr. Earl F. Dauterive at (318* 264-4000.

Sincerely,

ARCO Oil and Oat Compm, n a Coition of AtianiicB.chimoComri»,

Supplemental Page 1.

DESCRIPTION OF THE PROPOSED ACTION

b. Personnel required at the present base includes the following:

a. M a t e r i a l s department 10 (ARCO) b. Telecommunications 1 (ARCO)

1 (CONTRACT) c. ARCO p i p e l i n e 1 (ARCO) ci. E ngineering group 2 (ARCO) e. Production department 2 (ARCO) f. Dock workers 8 (CONTRACT)

25 TOTAL

The new base should be i n operation about September 1, 1981. At that time the only change i n personnel w i l l be the addition of 3-4 contract people f o r pipe yard operation. The ol d base w i l l be used f o r most of the pipe storage and handling which i s presently done by A-2 Pipe adjacent to the base (west s i d e ) .

Personnel w i l l be able to arrive/depart d i r e c t l y from the new base instead of checking i n and d r i v i n g to PHI (Petroleum Helicopters, Inc.)

A s t a f f of approximately 200 people i n the Lafayette D i s t r i c t Office along with about 120 f i e l d personnel comprise the e n t i r e d i s t r i c t operation. However, some departments have separate onshore and offshore groups which reduces the actual number of people who support a c t i v i t i e s associated with t h i s base.

[See attachment "B"]

Supplemental Page 2.

3. Description of the Affected Environment and Impacts

(6) Existing pipelines and cables

No pipelines or cables Dresently e x i s t i n t h i s block.

(7) Other mineral uses

No other known mineral deposits of commercial importance occur w i t h i n the lease area.

(8) Ocean <* imping a c t i v i t i e s

No approved ocean dumping s i t e s e x i s t i n the v i c i n i t y of the lease area.

(9) Endangered or threatened species

[FES Sale 58, pp. 11-41,42 (B-9)]

Several f e d e r a l l y endangered species occur, either on a permanent or t r a n s i t i o n a l basis, w i t h i n the region of the Gulf of Mexico. With many of these species, no d e f i n i t i v e range i s i d e n t i f i e d ; thus i t i s d i f f i c u l t to portray the species accurately for environment assessment purposes.

A b r i e f discussion of the range of species can be found as noted above. Appendix H l i s t s those species i d e n t i f i e d as endangered by the U.S. Fish and W i l d l i f e Service. (Source: Bellrose, 1976; Roberts, 1974; and Murphy, 1967.)