In Reply Refer To: NS 5231 October 23, 1592

Seagull Energy E&P Inc. Attention: Nt. Rita Helntz 1001 Fannin, Suite 1700 Houston, Texas 77002-6794

Gentlemen:

Reference 1s made to the foil -ing plan received October 9, 1992:

Type Plan - Initial Plan of Exploration Lease - OCS-6 11283 Block - 552 Area - Brazos Activities Proposed - Hells A through 0

In accordance with 30 CFR 250.33, this plan Is hereby deemed submitted and Is now being considered for approval.

Your control number 1s N-4369 and should be referenced in your communication and correspondence concerning this plan.

Sincerely,

(Orig. Sgd.) A. Donald Gircir

D. J . Bourgeois Regional Supervisor Field Operations

AGobert :dc: 10/14/92: POECON

bcc: .Lease OCS-G 11283 POO File (NS 5032) [NS 5034 w/public Info, copy of the plan y. and accomp. Info.

SEAGULL ENERGY E&P INC.

^ O r r r , „ r n

OCT 0 91992 J < k OPWATIONS J * -

October 8,1992

Mr. Daniel J n >urgeois Regional S\\\ visor Office of Fielu Operations Minerals Management Service 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Reference: Initial Plan of Fxpioratioo Brazos Block 552, OCS-G 11283 Offshore Texas

Gentlemen:

Seagull Energy E&P Inc. herewith submits for your approval an Initial Plan of Exploration for Lease OCS-G 11283, Brazos Block 552, Offshore, Texas.

Seagull anticipates commencing activities under this Plan of Exploration about November 10,1991

Should you require additional information, please >* vise.

Very truly yon

on or

Rita Heintz Regulatory Coordina

rh

Attachments: 5 Proprietary Copies 4 Public Information Copies

. PUBUC INFORMATION

SEAGULL ENERGY E&l INC INITIAL PLAN OF EXPLORATION

BRAZOS BLOCK 552 OCS-G 11283

Seagu ergy E&P Inc. it the designated operator of the Brazos Block 552 and it subu. ag thit Initial Plan of Exploration in accordance with 30 CFR 250.33 and subsequent guidelines. Excluded from the "Public Infonnation" copies of this plan arc certain geologic discussions, well depths, and structure map.

PROPOSED OPERATION

Seagull proposes to drill four (4) wells, Locations A through D under this Plan of Exploration. Anticipated commencement date of operations it November 10, 1992 subject to plan approval and issuance of permits to drill. The proposed weUs should take approximately 30 o each to drill.

Other activities wmch may be conducted under thit plan would be the setting of a weU protector structure or template, running a velocity survey, and collections of soil borings.

DRILLING EQUIPMENT DESCRIPTION

The propoted wells will be drilled with a typical jackup drilling rig. Drilling and other operations will be conducted under the applicable provitions of OCS orders, notices and regulations and in the interest of safetv and pollution control. Schematics of a typical diverter tystem and blowout preventer are enclosed on Attachment A.

WELL LOCATIONS

WELL LOCATION PTD WATER DEPTH

A SL: 0900/FNL 6350* FWL 79* BHL:

B SL 0900* FNL & 6350* FWL 79* BHL

C SL 5200* FNL & 1100* FWL 79* BHL

D SL 5200* F N L * 1100* FWL 79* BHL

Location plat, structure map, and bathymetry map are enclosed on Attachments B,C,andD.

SHALLOW HAZARDS

Information on geological and physical hazards pertinent to the surface locations of the proposed wells is enclosed as Attachment E.

OIL SPILL CONTINGENCY PLAN

Seagull it a member of the Clean Gulf Attociatet whh an approved Oil Spin Contingency Plan on Sle with the MMS. Seagull intends to exercise due diligence towards protection of tbe environment owing drilling and production operation*. An oil spill trajectory and response analysis it included on ArtartmtrmF.

NEW OR UNUSUAL TECHNOLOGY

Seagull will not use any new or unusual technology in the drilling of these

LEASE STIPULATIONS Na 1 - A Cultural Resource Report wat submitted with the Shallow

Hazards Survey.

DISCHARGES

DgctmrfT Retet All discharges associated with the drilling of the proposed wells will be in accordance with the EPA NPDES General Permit for the Gulf of Mexico. A discussion of the apprcorimate anticipated discharge rates per well are listed on Attachment G.

ylittngM«iifl does not plan to utilize oil bated muds during the drilling of these Monthly and end of well LC50 toxicity tests win be performed in

accordance with EPA regulations. Any drilling fluid contaminated with ofl wfll be transported to shore for proper disposal at an authorized disposal she. A list of mud additives is enclosed on Attachment H.

fc Waste will be treated on location. Solid domestic wastes wfll be transported

to shore fo proper disposal.

k Drainage dt drainage will be estimated by amount of rainfall and wash water used. All

discharges will be free of oil.

HYDROGEN SULFIDE

A geological review of the Brazos Block 552 indicates no evidence of hydrogen sulfide. Data reviewed included all infonnation from Transco Exploration's No. 1 weU in Brazos Block 552 (OCS-G 6082) which penetrated a depth of 8882'. This well is located approximately 2650 feet south of our proposed location "A". Based on this data, Seagull requests that in accordance with 30 CFR 250.67 a determination be made that this area is classified as an area where the absence of PLS has been confirmed.

PROJECTED EMISSIONS

Refer to Attachment L Air Emission Schedule.

ONSHORE BASE

Brazos 552 is located approximately 25 mfles from shore. The water depth is approximately 79*. A location map of Block 552 relative to the shoreline and onshore base is enclosed on Attachment J.

Seagull wfll utilize existing onshore facilities located in Freeport, Texas. This will serve as port of debarkation for supplies and crews. No onshore ei pension or construction is anticipated with respect to this activity.

This base is capable of providing the services necessary for tbe proposed activities. It has 24 hour service, a radio tower with a phone patch, dock

During drilling operations, one supply boat will be making four trips per week, one crew boat will be making seven trips per week and one helicopter will be making three trips per week.

The onshore activities associated with Brazos 552 should not result in any increase in tbe size and number of onshore support and storage ranThies or land and personnel requirements.

AUTHORIZED REPRESENTATIVE

Inquiries regarding this plan should be addressed to the following authorized representative of Seagull Energy E&P Inc

LIST OV ATTACHMENTS

A. BOP/Drverter Schematic B. Location Plat C Structure Map D. Bathymetry Map E . Shallow Hazards Analysis F. Oil Spill Trajectory Analysis G. Discbarge Rate Table H. Mud Components I. Projected Emissions J. Vicinity Map

Rita Heintz Seagull Energy E&P Inc. 1001 FannuvSuite 1700 Houston, Texas 77002

713/951-1368

3

Attachment A

DIVERTER AND BOP SCHEMATIC

DIVERTER ASSEMBLY

eaaverepeta—fci w

H R . M M U C « « b « 0 « U V t l v *

i 1 D

-r-m—' • l a R M M U C M U « I Oat* Veto*

BOP ASSEMBLY

U I / l k W H U n i t i i W

t i l . a Ii

2 1/ IOM Cat* V . l v . . OMOaU Vatv*

a 1/ i thL IMeflMkVMM 2 1/1 «m. ioMHCnv.lv, S 1 / U t a lOMCkMk Valve

API 10M-1J 0/S-P.SP.dA H2S Trim

t 1/1« M. 1MIHCH V^v*

6350' 18 SEAGULL c - ^

4 ^ * * * . * . OCS-G-11283 5 5 2

I

I UOO' r , « C Loc. A S.L. 'or D \

SEAGULL ENERGY E & P INC.

ATTACHMENT B

BRAZOS BLOCK 552 OFFSHORE TEXAS

PUBLIC INFORMATION

S C A U : i - • 2000' OATC :

Attachment E

SHALLOW HAZARDS REVIEW BRAZOS BLOCK 552

OCS-G 11283

Gulf Ocean Services, Inc. completed a shallow hazard survey in Brazos Block 552 for Seagull Energy E&P Inc. Company during September, 1992. Tbe data obtained included side scan sonar, magnetometer, subbottom profiler, fathometer and sparker.

geophysicists have reviewed the geophysical data pertinent to tbe locations of the wells and determined the area dear of any natural or

man made hazards.

Attachment F

OIL SPILL TRAJECTORY ANALYSIS

vriume open sea skirnmer based at Grand Isle. "" ^ u S S X providing equipment, the CGA also supplies a d v f o • > -JSL ^J^SJ? flPWm available from CGA and the base it is located il l ^ i ^ f r t b T ^ ^ l % ? ^ * * * * * * loca'ted X A ^ ^ ^ S M M U ^ T ^ U 5 ? addjt»ortar equipment transported frcm? tneiJSSS equipment base on-site as required. ^ ™ n 1 0 6 nearest

Estoutted response time for a spill iii Brazos Block 552 duriaa normal weather corjdrtkms couk vary from 14 to 16 hours based on the fortowmg^

PROCEDURE HODBS

L Procurement of equipment and transportation vessel 40

2. Load out of Fast Response Unit ZO

3. Travel to deployment site from CGA bav (80 miles 8.0

4 ° 2 > , 0 y m C n l 0 1 w u i n m * « t "nd dean »p equipment on 1 0

TOTAL ESTIMATED TIME •if

150

S S S L f 2 ? 0 0 0 1 1 1 0 * operations cn Brazos Block 552. Sea-uil h«

^ T < ^ S S T ^ " ' 6 l a n d °f oil spill ton, ou,

LAND AREA SGMNT

W-12 7 W-12 8 W-12 9

COUNTV PCNT PROB CGA MAP #

Calhoun Matagorda Brazoria

\% 38% 9%

TXMap2 TX Map 2&3 TXMap3

S3SS

Attachment H

DRILLING MUD COMPONENTS FOR POE

COMMON NvME DESCRT TION < *F MATERIAL

WeighUngAgeLts Barite Calcium Carbonate Heavywate

Viscosifiers Gel Benex Salt Water Gel Asbestos Fibers Polymer

Dispersants Phos SAPP Lignosulf nd'e Ltgniu* Tannin

Filtration Control Add tins Starch CMC P. is pac Cypan, W:."(.'

Chemiccl' Lime Bicarb Soda Ash Caustic

Sodium Chi jmate

Gypsurn

Sat, Chi erne Al'ini De'-(/f...icrs. Ilocculants Aluminum Stearate Defoam Foamban

Barium Sulfate (BaSO<) Aragonite (CaC03) Iron Oxide (FeiOs)

Ben'onite, Montmorillomte i* ilymer, Clay Extender Attapulgite Gay Ouysotilt Asbestos w\»nthetic Polymer

Sodium Tetraphosphate Sodium Acid Pyrophosj- iate Sodium Lignosulfonate NaCH Treated Lignite Sulso Methylated Tannin + Sodi rm Dichromate

C jrn Stare! Sodium Carboxymethyl CeilM }*e Polyanionic Cellulose Sodium Polyactylate

Calcium Hydroxide Sodium Bicarbonate ( I ^liCQi) Sodium Carbonate (Rsf O3) Sodium Hydroxide (NaOH) Sodium Chromate fNaCrO4.10H2O) Calcium Sulfate (CaSO <5) Salt (Nav Chromic _h'uride

Aluminum Stearate Sodium Alkvl Aryl Sulfonate Surfactant

DRILLING MUD COMPON L ^ PAGE 2

COMMON NAME DESCRIPTION CF ItATVRLAJ,

DeterasaU, Bacteriocides, Lu brican t > Preservative DME Soap Sector* HoleeoatR

UMnI Shaletrol Noxygen rrecpipc Spotting Fluids

Black Magic SFT*

Lost Circulation Materials Nut Plug Mica CeDoflake lUHfctai* Diase u-Mp

l'a.aformaldehvde K m-tonic Emulsifier billing Fluid Deten»cut PJ ocessed Hydrocarlo.is Water Dispersable Asphpits BiodVrjadable Vegetable Oil Aktsionuu Organic Add Complex Catalyzed. Sod":- SnKfce OilSf Juble Sntbumt Fauy Adds, Nulfo.ui'. Lt and A .phallic Materials Si eked Con;entr*trd Asp^Hines

Ground Nut She!!* Ground Mica 'lastic, Shsedtv 4Mlophane Combination <J Grhn Jes, Flakes and Fibers nous Si es High Watr;: L , IMatornite Blend

Attachment I

AIR EMISSION SCHEDULE FOR POE BRAZOS BLOCK 552

OCS-G 11283

GENERAL LNFORV^lOrx

Location of Project:

Location of Shore Bare. 6C. ) Miles N£

MO*." J rype: Ope.' tor.

Company Representative: Footage Planned 1992-3: Planned Con»rnencemeit Date: Exemptic* evel Calculations:

Distance io shoreline (CO) E-S ''0fD2/3) (NOx.VOC.TSP.SO2) B-33.3(D)

MAJOR OCVSHORE SOURCE

Brazos Blot Ic 552 OCS-G 11233 Freeport, T.*xas Existing 'adlitir* Bottom S unxmed lack Up Seap>-.li Energy EOP lie. 1001 Fannin, Sulu 1700 Houston, Taaa 77 W? Ms. Rita Heintz

November 10. 19f/2 Air Emissions Miles 25.0 Tons/Yr 29070 Tons/Yr 832

POWJ used by tlrUiing unit: 12 J Day* Duittion

Projected Enussioos

CO SO1

w\ VOC TSP

Lbs/Day

96 42

359 10 36

Approximate footage to be drilled •

Tont/Yerx

5.75 2.52

2' 57 ,<3 2.16

• 7'.«od oa 60 HpHr/Ft from ' Ai joipbenc Erciukx.' u-.u, Offshore Oil tad OM Development aad I rt>.«etie*i", Table t-3, EPA Nc. *50n 77-026, June IV77.

•• Flvm * Cc mpiUuoc of Air Pollution Bmi" JO Factor.', Table 3.4-1, EPA Report AP-42, Fourth Edition, Lcptember I9ft'i.

AIR EMI.1'v ION SCHEDU1 £ SEAGULL sNBROY E&P INC. PAGE 2

MINOR OFFSIiiORE SOURCF. • HpHrs/

Trc~~port H i Trips Weeks Cycles Supply Boat 2000 4 17 1088000 Crew Boat 1800 7 17 1028160 DAIIMmmmm

rkeiicorjier N/A 3 17 SI

Minor EmissicMU Lb-Day Lia/Year Toot/Year CO 116 131%' 6.95 SO* SO 593* 2.98 NOx 4 i ! 50876 25.44

JC 13 1590 0.80 rsp 43 5210 2.60

• From 1 Compilation oi Air Pollution Emisiior. Factor Volume I , Tibia* 3.4-1, 2.1-1, Volume II . TabbM O-I 2, n-1-3, n - I - l , 1-PA Report AP-42, Fourth Edition, SeptMnbcr 1985.

SOURCE TOTALS (Tons/ Year)

1992-3 CO NTs VOC TSP Major 5.75 2.52 21.57 0.63 2.16 Minor 6.95 2.98 25.44 0.80 2.60 Total 12.70 5.49 47.01 1.42 4.76

ONSHORE SOURCES

No additional onshore facilities arc required for this operation. Trie onshore source emission total shou ' be less than the Minor Source Total.

EMISSION EXEMPTION STATEMENT

Due to the low level of emissions associated with this operation, it has been determined per DOI/MMS regui».*Jon* that this project is exempt from further air quality review and will not have an advnst affect on air quality.