Ifi Reply Refer To: DEC 1 2 T384

Sun Exploration end Production Coapany Attf-ntlrn: Nr. Alfred B. Uorwood

ost Office Box 150! Henttou, Teias 772S1

ftentleeen:

Reference It nade te your Initial Plan of exploration received Noveaber 2ftt

1984. for Leases OCS-G 6366 and 6369, Blacks 229 anU 273, respectively, Gar len Banks Area. TMs plan includes the activities, proposed fer Hells A through F ef Block 229 and Wells A through E of Block 273.

tn accordance with 30 CTR 250.34, revieed Decanter 13, 1979, and our letter dated January 29, 1979. this plan has been determined to be cornel et* at of Dec enter I t , 1984, end 1s now being considered for approval.

Toe plan control neater 1s N-1926 ano should be referenced In y - r cownunice­tion and ccir?spondence concerning this plan.

Sincerely yours.

Original Signed: font I Stauffer 0 " 9 . V. Solanas

Regional Supervisor Kelts and Production

•oc: Lease OCS-G 6366 (OPS-2-3) (FILE ROOM) Lease OCS-G 6369 (OPS-2-3) (FILE ROOM)

lgfc l -5 w/Pub11c Info. Copy of the plan (PUBLIC RECORDS ROOM)

AOGobert:gtJ:ll/29/«4 Disk 3b

PLAN OF EXPLORATION

OCS G 6366/6369

GARDEN BANKS AREA BLOCKS 229/273

SUN EXPLORATION AND PRODUCTION COMPANY

November 20, 1984

Contact:

A.B. Norwood Sun Exploration and Production Company

P.O. Box 1501 Houston, Texas 77251-1501

Phone: (713) 531-2158

*« mmm

GARDEN BANKS AREA BLOCK 229/273 OCS G 6366/6369

TABLE OF CONTENTS

Description of Work

Shallow hazards Statements

Area Location Maps

Base Support Fac i l i t y Data

Vicini ty Map

Environmental Safeguards

List of Mud Additives

Description of D r i l l i n g Rig

Air Quality Computations

Geological and Geophysical Data

Environmental Report

Coastal Zone Consistency Cer t i f i ca te

Shallow Hazard Survey Report

SUN EXPLORATION AND PRODUCTION COMPANY PLAN OF EXPLORATION

GARDEN BANKS AREA BLOCK 229/273 OCS G C366/6369

This Exploration Plan for these blocks has been prepared 1n accordance,.with 30 CFR 250.34-1, Gulf of Mexico OCS Orders and Notice to Lessees No. 83-3.

These Blocks were leased on July 1-, 1983. Geophysical activities have been conducted and the first exploratory well should begin as early as January 15, 1985 - subject to the availability of a drilling rig, approval of this Exploration Plan and the required pennit to d r i l l .

Well Surface Location TVD Drilling Days

GB 229 A 5650' FWL 2100' FSL 16000' 120 B 5750' FWL 4500' FSL 16000' 120 C 500' FWL 7900' FSL 16000' 120 D 3000' FWL 5200' FSL 16000' 120 E 3300' FEL 500' FSL 16000' 120 F 2000' FEL 11,800' FSL 16000' 120

GB 273 A 2000' FEL 2300' FNL 160°0 120 B 1000' FEL 1000' FNL 16000 120 C 500' FEL 8400' FSL 16000' 120 D 6800' FWL 500' FNL 16000' 120 E 6000' FEL 6000' FNL 16000' 120

Subject SHALLOW HAZARDS AT PROPOSED WELL SITES GARDEN BANKS BLOCKS 229 AND 273

teroffice orrespondence

Date |

Location

9-5-$4

U.S. Offshore and Alaska Region Gulf of Mexico and East Coast District

From Joe Molenaar

To Al Norwood

A high resolution multi-sensor geophysical survey was conducted by John E. Chance and Associates during November, 1983.

The seafloor 1s smooth 1n Block 229 with no apparent surface faul ts or areally extensive amplitude anomalies at any of the fol lowing surface locations.

The seafloor 1n the northeast half of Block 273 1s smooth, although the subsurface 1s obscured due tc biogenic gas-saturated sediments.

Bathymetry wi th in the southwest hal f of Block 273 1s very complex. High angle escarpments and calcareous outcrops characterize th is portion of the study area.

The following surface locations are situated 1n the northeast hal f of Block 273 wi th in the area of the_smooth seafloor.

LOCATION J B C D E F

5,650' FWL, 2,100' FSL, Block 229 5,750' FWL, 4,500' FSL, Block 229

500' FWL, 7,900' FSL, Block 229 3,000' FWL, 5,200' FSL, Block 229 3,300' FEL, 500' FSL, Block 229 2,000' FEL, 11,800' FSL, Block 229

LOCATION JT B C D E*

2,000' FEL, 2,300' FNL, Block 273 1,000' FEL, 1,000' FNL, Block 273

500' FEL, 8,400' FSL, Block 273 6,800' FWL, 500' FNL, Block 273 6,000' FEL, 6,000' FNL, Block 273

Joe Molenaar

•Location E is situated 1,500' north of the area of high angle escarpments and w i l l require special orientat ion of the anchor chains.

A shallow Hazard Survey was completed 1r> March 1984. Three copies of this report are enclosed.

\

229

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-3300'-

! _

O PROPOSED LOCATION

N

Sun Exploration ft Production Ca OCS 6-6366

Garden Banks Blk. 229

Plan of Exploration

Brett Bozeman 4 /4 /84

Scale- r»200CT

I «

273 -eeoo

i i » i

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CHOOCV-

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O PROPOSED LOCATION

I N

Scole.- \\2QCXi

Sun Exploration 8 Production Ca

OCS 6-6369

Garden Banks Blk. 273 Plan of Exploration

Brett 3ozeman 4/4/84

• ' "

OTHER DATA AND INFORMATION

The onshore support base for these proposed development operations

w i l l be Sun's ex is t ing offshore embarkation'terminal at Sabine Pass,

Texas. This present (since 1973) offshore support terminal encompasses

a total area of 4.25 acres and includes an o f f ice bui lding with small

inside storage area; pipe and equipment storage yard, boat dock, bulk

mud storage, diesel fuel storage, and bulk cement storage and a large

warehouse.

Travel routes f o r boats w i l l be from Sabine Pass, Texas to the Sea

Buoy (18 miles) then d i rect ly to Garden Banks Blocks 229/273 surface

location.

Helicopters w i l l use the most d i rect route feasible. Boat and

helicopter t r i ps to Garden Banks Blocks 229/273 w i l l probably occur

on an average of three t r ips per week to transport personnel

and/or supplies.

AIR QUALITY CALCULATIONS

An Air Quality Calculations report 1s attached. The results of th is

report show that the amount of emissions expected for th is ac t i v i t y

are below the exemption amount and that further review is not required

1n accordance wi th 30 CFR 250.57-l(d).

HIGH | * L A ND t l a ^ - - 3

^ W E S T JCAMERO N ' ^ A B E A

- E A S T CAMEROr*

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CO

U.S. COAST GUARD PROPERTY

VAIEHOJSE tUHOIMB • 0 A 0

SUN OFFICE IUILOIHC

—.'»00C* FAC ILI IT

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D TEMP. OFFICES

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WAREHOUSE

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VU . TY MAP

IASE SITE 2 1

HOUSTON

i

SABINE PASS

0 10 20 30 AO 30

i 9 * i

SUM EXPLORATION I PRODUCTION" CO.

SABINE PASS IASE SITE

SA8INE PASS

JEFFERSON C3UNTT.TEUS

ENV I RONMENTAL - SAF EGUARDS

Vm: Exploration and Production Company (Sun) w i l l adhere to a l l applicable * -onmental standards of the EPA, MMS and U.S. Coast Guard. Sun is a

member of CVIean Gulf Associates (CGA) and w i l l * u t i l i z e thei r equipment and the manpov?r and expertise of Peterson Maritime Services, Inc. as well as othet special ists 1n pol lu t ion control and clean up as needed.

Existing o i l s p i l l cleanup equipment w i l l beach protection and bird cleaning stat ion are a l l within a few hours ca l 1 in the event ot* a s p i l 1 . This equipment is ma'ntilned on standby and in a ready state at C"*A locations at Grand iV.e, Louisiana; Houmc Louisiana; Intra ""oasta" City, Louisiana; Cameron, Louisiana; Galveston, Texas and R e p o r t , Tex."»5.

The average response times (Including load-out ? I t ravel) for the major pieces of o i l s p i l l containment and clean up equipment available ( i . e . , Fast Response Skimmei Systems I and I I , Containment Boom, l<?d1o System, Saucer Type SkittAen., Toat Spray System, e tc . ) are projected as f o l l o w :

Location Hours

Cameron, Louisiana 19 Intra-Coastil C i t y , LouUlan 19 Galveston, l i xas 19 Houma, Louisiona 25 Grand Is le , Louisiana 26 Venice, Louisiana 30 Rockport, Texas 31

The response times for larger equipment (High Volume, Open Sea Skinner Systein - Hoss Barge) and/or smaller equipment w i l l vary considerably according to the point of o r i g i n , type of transpo-t.w.on, weather condit ions, etc.

A copy of Sun's 011 Spi l l Alert Procedure for the G j l f of Mexico 1s on f i l e with the U.S. MMS off ices in the Gulf of ? ' r . /1^ area. Sun intends to u t i l i ze Pt'srson Maritime Services, Inc. fo» cleanup operations sr>uld an o i l sp i l l occur. . . . .

Sui w i l l not dispose- of well f l u i ds containirg free o i l Into the Gulf of . 'xico. Any f l u i d containing tree o i l w i l l be brought to shot* P*r proper disposal. A l l solid wastes K i l l be disposed of as per IKS Ordar No. 7. Sun's personnel w*11 br >.,t. <jcted 1n the t?c!.n1ques ot equi^nei r maintenance and operation r e l ? f - i pol lut ion prevention, and pol lut ion Inspections w i l l ba perf oi rer OCS Order No.7.

Sun's base of operations i:. . se of an o i l s p i l l 1s the emergency response center 1n our o f f i ces at rfou*>toii9 Texas. Field personnel w i l l .-.e dispatched f rom jour case support fad21 > at Sabine Pass, Texas.

OCS G 6366/6?C0

GAPOcN CANKS BLOCKS 229/273

DP ILL I No MUD' iTERIALS

fr de N?mas (MogcoLir) • rcr ic Name

Sa""!t 6V A t t a p u l r t e Magcogei Bentonl Magccar Bu-ite XP-20 Chrome Lignite Spersene Chrome Lignosulfonate Caustic Soda Caustic Soda Drispac Polyuiiionic Cellulose Aluminum Sterate Aluminum Sterate Bicarbonate of Socd Bicarbonate of ir»da Nut Plug Walnut Hulls Magco-Mica H K ;

Sc Ash "?oda Ash CMC Carbonxy-metliyl Cellulose HEC Hydroxy-ethy• Ce" iu!c5*J Graphite Graphite DD Dr i l l i ng Detergent XC Polyn«?r "arbohydrate Biopolym'^ XC Polyn«?r

V1scosif1er Tanathin Lignite MC Quebracho Lignosulfonate Ben-Ex YirM Acetate-Maieic

Anhydride Copolymer WO-3P (H1/chem) Graded Calciun Carborate PUwiser (Major Mud & Chem) Mineral 011 w/surfactant 01 s ht'.t (Major Mud & Chem) Mineral 01' w/gi lsun.-° CV Spot (Delta) Mineral Oi 1 w/amic.'

emulsi f ier , fa t ty acids, and wetting agent

Black Magic* - Sack Fishing Diesel w/a blown asphalt, ra!cium Hydroxide, fa t t y adds , surfactant

• I f this materia 1 s used, 1t w i l l i»e hauled to shore . >r disposal.

D r i l l i ng mud w i i l be u t i l i zed on w e l - w e l l basis with the excess being dumped overboard.

1C4/843 - (1)

I I DESCRIPTION OK DRILLING Rib

The d r i l l ' g r i g co be used has not been contra'-' •-* i , however Sun Intends to ne i seml-3ubmerslole such as the "Ocean Scoit" which l s descr a .ereln.

"OCEAN SCOUT"

GENERAL DESCRIPTION:

The "Ocean Scout" ls a semi-submerslble (unrestricted classification) drilling platform built ln 197^ by Bethlehem Steel Corporation, Baltimore, Mary?.?nd for ODECO, Inc., New Orleana, Louisiana.

The d r i l l i n g platform constats of two parallel rectangular shape hulls spaced 1^0*-0" on centera, with four corner colums and .i upper watertight hull supported by the corner columns, four Intermediate columns., four transverse tubular trusses and two Inclined longitudinal trusses

The d r i l l flcoi ls supported by a horse trufj and two colt trusses at the 1?7 ,~6 H level.

DESIGN CHARACTERISTICS:

The platform i« capable of drilling ln water depts up to 600 ft. at M8«-0 M S '-O" drafts and with nominal modifications deeper water depths can be obtained.

Stability of ti:v "Ocean Jccut" has fcc*n approved by the American Bureau of Snipping. The structu la designed for Qulf of Mexico sea conditio- . (68 f t . wave height - 15 second period) at a nominal draft c. 4b f t .

App < yiniate natural motion periods with f u l l deck load are as fallows -

Roll Pitch Heave

3*».0 (seconds) 25.0 (seconds) 17.0 (seconds)

. I •

QUARTERS:

AccommoG^iions are provided for'a crew of 59 men in a i r conditioned quarters. • ,

HELICOPTKh DECK:

The.helicupter deck has a clear landing area o" 67 f t . X 56 f t . ar . w i l l accommodate an S-61 hell copter.

ELECTRICAL SYSTEM:

Main power i s provided by three (3) EMD dleael enginea, Model S-16-645, each rated 1950 HP at 900 RPM. Two (2) engines, each driving two (2. 1600 KWDC generators and one (1) 600/1000 KWAC generator. On*. (1) engine driving two (2) 1600 KWDC gener­ators .

MOORING SYSTEM:

The "Ocean Scout" 13 held on location by eight (8) 30,000 lb. Stato anchor". Bee ; anchor i s equipped with 2500 f t . of 2 1/2" diameter stud Xtri chain, break test 744,000 Iba., proof test 492,000 lbs. Additional chain can be added since locker volumn l s available.

There are four Bendlx-Skagit double drum anchor windlasses. Each windlass l s driven by a Westinghouse ;iodel 3/0 DZ, 1000 HP D.C. el e c t r i c t r a c t i o n motor, rated 184,000 lbs. p u l l at s t a l l . The band brakes have a st a t i c brake rating of 276,000 lbs. Releasable chain stoppers air also i n s t a l l e d .

The attached diagram shows a typi c a l anchor pattern for the "Ocean Scout".

t

V M A « « 3 i vr-j.MiC LAUNCH

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+ ' S Z \ OPPt« DECl * * y m - * * V 0* A fc C

DECK A fel.

A DECK t L

COMTfcSL KOO* DECK 7^ -9"Adl

DRILLING O V f T 4S-0*ABL

OCEAN SCOUT fe O U T B O A R D \ ' r l L E

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TYPICAL EIGHT POIHT SPREAD MOORING SYSTEM FOR SEMISUSME-RSI0LE; RlG

S u a * l - » IOOO*

• . 1

TYPICAL DIVEKTEK SYSTEM UASED UN THE

OULCO - OCEAN SCOUT

0

Flow Line To Shale Shaker

To tort

( T ) Regan tyu« KFDS divortar

Taluucopic Joint

12H Diverter Lino

150 yui WECO gate valve

X0

I To

Starboard

AIR QUALITY CALCULATIONS FOR DRILLING OPERATIONS

GARDEN BANKS BLOCKS 229/273

Using the QDECO "Ocean Scout" as a typical seifll-submersible d r i l l i n g r i g Equipment Includes:

3 EMDKS-16-645 rated 1950 BHP e SOO RPM 1 Lister SR-2Z rated 12 BHP G 1800 RPM 2 GM 6-7IN rated 238 BHP P 2100 RPM 1 GM 3-53 rated 68 BHP 9 2100 RPM 2 GM 8V-71 rated 318 BHP 9 2100 RPM

Fuel Consumption:

A. Dr i l l ing operations

B. Non d r i l l i n g operations

C. Transportation

Total Fuel Usage

5008 gal/day

2454 gal/day

1250 gal/day

8712 gal/day

Projected Emissions:

Particulates (TSP) 8712 gal x (365 days) x (*33.5 l b ) x (ton)

day x y r . 1000 gal 2000 lb • 53.26 tons

> *.

Sulphur Oxides (SOx) 8712 x 365 x *31.2 x 1 * 49.6 tons

1000 2000 y r .

Nitrous Oxides (NOx) 8712 x 365 x *469 x 1 - 745.68 tons

1000 2000 y r .

Hydrocarbons (HC) -8712 x 365 x *37.5 x 1 « 59.62 tons

1000 2000

Carbon Monoxide (CO) 8712 x 365 x *102 x 1 - 162.17 tons

1000 2000 y f T

*A1r emission factors obtained from EPA-42 Appendix C, Supplement 9

Garden Banks Blocks 229/273 are 136 miles from Pt. Wall (nearest land).

1C4/830 - (1)

1

SUMMARY OF EXEMPTION CALCULATION INFORMATION

Pollutant Formula •*

D(m1les) "E"(T/yr) Projected Emissions (T/yr)

Emissions ± E?

TSP E=33.3D 136 4,528.8 53.26 Yes

so2 E«33.3D 136 4,528.8 49.6 Yes

NOx E=33.3D 136 4,528.8 745.68 Yes

HC E«33.3D 136 4,528.8 59.62 Yes

CO E« 34000* 136 4,528.8 162.17 Yes

i

1C4/830 - (2)

I

Sun Exploration and Production Company, as Operator, believes th is

information submitted separately from Exploration Plan for OCS G 6366/6369

Garden! Banks Block 229/273 to be exempt fron. disclosure." Sun requests

that the data and information enclosed herewith be dispersed for use

only by the United States Government.

Geological information provided includes:

1. Structural maps.

2. Cross Section.