Ia Raply Refer Tos PO-2-1 Bap teaser 6, tfl

SOHIO rrtroleua Ooapaay Attentloni **. Cary *. levlls f W ^ t t i i M I fiaaijai

niiillaaaajl

Reference ir aada to yoar Initial Plan of Exploration ani snooapaAylna inforaation rsotleed August 21. 1MB, for 'aaa* "HH! t^fji Blook A-218, Oalvaatoa araa. Thla plan Ina lad aa tha activities propoaad fbr Valla A through B.

In secordA.ce with 30 CFR 250.33, thla p)*a la hereby deened subnltted and la aw being oonaldeied for approval.

Tear plan aonfrse nueaer la B-3107 and should be refer aaa ed ln your ooanaanl-oatlon and eerr .pondenoo eomerniat thla plan,

yJaaaraJgy yours,

(Ori6. Z:±) A. C:na.j Giroir

* D. J . Bourgeois Boatman Supervisor Field Qpsrallnao

boot Laaae OCS-G 9063 (OPS-3-2) (PILE BOOM) /OrS-3-4 a/ Public Info. Copy of tha plan I, aad aoooap. Info (PUBLIC RECORDS)

hD Joseph!ockx08/23/88:p

SOHIO PETROLEUM COMPANY i-. " : • i

COK'iNINTAc * OFFSHORE D.uV<»\ August 15, 1988

Nr. D. W. Solanas Regional Supervisor Offshore Operations Support U.S. Department of the Interior Minerals Management Service P.O. Box 7944 Metairie, LA 70010-7944

Re: Plan of Exploration Galveston Block A-218 OCS-G-9063, Wells A,B,C,D & E Offshore Texas

Dear Mr. Solanas:

Please find enclosed five (5) Confidential and six (6) Public Information copies of the Plan of Exploration (POE) for the above referenced project. Accompanying this POE are one (1) set of processed seismic Une data offsetting each wel. location, and two (2) copies of the Hazard Study by John Chance & Associates, Inc. for Galveston Block A-218.

If you have questions or require additional information, please cal l Cynthia Arnold at (713) 552-3810.

Sincerely,

Cary W. Kerlin Regulatory Supervisor

CLA/dsh Attachments

cc: Mr. W. D. Harris

SOHIO PETROLEUM COMPANY

PLAN OF EXPLORATION

OCS-G-9063

6ALVEST0N BLOCK A-218

OFFSHORE TEXAS

PUBLIC !NFOPMAT!OM

LIST OF ATTACHMENTS

A. Description of Drilling Rig

B. Letters from Sohio Petroleum Company's Regional Geophyslclst

C. Vicinity & Well Location Plats

D. Geologic Cross Section & Structure Maps

E. Drilling Mud Components

F. Projected A1r Emissions Schedule

SOHIO PETROLEUM CONPANY GALVESTON BLOCK A-218

OCS-6-9063 OFFSHORE TEXAS

Pursuant to tht requirements of 30 CFR 250.23.1, Sohio Pttroltum Company sub­

mits tht following Plan of Exploration (POE) for Galveston Block A-218.

(1) EXPLORATION ACTIVITY

Tht propostd exploration activity for Galveston Block A-218 consists of

drilling Wells "A, B, C, 0, & E" from five (5) dlfftrtnt locations. The "0 & E"

locations will be drilled as straight holes and the "A, B & C locations will be

drilled as directional holes. The estimated time to drill these five (5)

exploratory wells 1s about one hundred-seventy (170) days, with an October 31,

1988 anticipated spudding date for the "A" location.

(111 PROPOSED DRILLING RIG

Sohio presently does not have a rig under contract for the "A, B, C, 0 & E"

locations; however, these wells will be drilled with a Jack-up drilling unit,

similar to the "Keys 302" owned by Keys Offshore. This rig 1s capable of

drilling to 20,000* 1n water depths of 300'. The rig's specifications, BOP and

Diverter systems are shown 1n Attachment A.

(111) GEOPHYSICAL WORK

All of the geophysical work prepar lory to Initiation of exploratory opera­

tions has been completed. A velocity survey may be run on these wells when

total depth has been reached. No other geophysical work 1s planned unless data

obtained from drilling operations necessitates additional definition detail from

conventional reflection seismic methods.

Plan of Exploration Galvaston Block A-218 Page 2

Two (2) copies of the shallow hazard report entitled, "Hazard Study Block

A-218", prepared by John Chance & Associates, Inc. are submitted with this POE.

The Galveston Area Hazard Study has been reviewed by Mr. Tom Allotta, Sohio's

Regional Geophyslclst. Letters frow Mr. Allotta in which he agrees with John

Chance's conclusions and addresses shallow hazards at each well site, are

included as Attachments B-l through B-4.

Attachment C-l 1s a vicinity map depicting the subject tract's position rela­

tive to the Texas shoreline. No new onshore facilities will be required for

drilling these proposed exploratory wells. Existing service company facili­

ties 1n the Galveston Area have sufficient capacity to accommodate this project

without modification or expansion.

Attachment C-2 shows the proposed surface locations for Wells "A, B, C, D,

E". The Bottom Hole Locations for Wells "A, B & C" are shown on the

Confidential copies only. The total depth, water depth and surface locations

for each of these wells 1s as follows:

Mv) VICINITY ANO LOCATION MAPS

Well "A" TO: Water Depth: Surface Location:

265' 10,140' FNL 8,670' FEL

Well "B" TO: Water Depth: Surface Location:

265' 10,140' FNL 8,670' FEL

Plan of Exploration Galvaston Block A-218 Pagt 3

"laFCSMVION

Well "C" TO: Wattr Depth: Surface Location:

260' 9,290' FNL

10,600' FEL

Well "O" TO: Water Depth: Surface Location:

236' 7,700' FNL 7,650' FEL

Well "E" TD: Water Depth: Surface Location:

265' 10,890' FNL 2,750' FEL

(v) STRUCTURE MAPS AND CROSS SECTIONS

Structure maps and cross-sections are Included 1n the five (5) confidential

copies of this Plan as Attachm»nts 0-1 through 0-5. Depths shown on

cross-sections and structure maps are sub-sea measurements.

(A) 011 SD111 Contingency Plan

Sohio Petroleum Company 1s a member of Clean Gulf Associates (CGA) and

would utilize that organization's equipment to clean up an oil spill.

The closest CGA bases 1n Texas are at Galveston and Rockport and 1n

Louisiana, 1n Cameron and Intracoastal City. Response times for C6A Fast

Response Units from thtst four (4) locations would bt 6, 18, 12 and 16

hours, respectively. Manpower to optratt the CGA's tqulpmtnt would bt

provldtd by Ptttrson Maritime Strvlcts, Inc., whose personnel are trained

for oil spill clean-up operations. Sohio's supervisory personnel would

direct the clean-up operations until successfully completed. Additional

details can be found In Soh1o*s 1988 Oil SpUl Contingency Plan, which

has been approvtd by tht Minerals Management Service.

(vi) OTHER RELEVANT DATA

Plan of Exploration Galveston Block A-218 Pagt 4

(B) List of Mud Components

Attachmtnt E 1s a 11st of tht propostd drilling mud components and addi­

tives. Including tht common and chemical trade name of each additive.

(C) Gaseous Emission*

Exploratory drilling operations will be conducted from the surface sites

described 1n section (iv) using the Jack-up drilling unit described 1n

Section (11). Operations will be of a maximum duration of one hundred-

seventy (VO) days.

At the drill site, gaseous emissions will be generated by the rig en­

gines, the attendant work boat, stand-by boat, crew boat, and helicopter,

and the production testing of possible prospective reservoirs. Gaseous

emissions at the dock site 1n Galveston, Texas will be generated by the

work boat, crew boat and helicopter. Onshore staging for this operation

will be from existing facilities, so there will be no significant

increase 1n emissions for this activity. Projected emissions from this

activity have been calculated and are presented 1n the environmental

report as Attachment F.

<°> Coestal Zone Management fCZH, Consistency Cert1f1ce^9P

A Coestal Zone Management Consistency Certification for activities

described 1n this plan 1s not required.

mm

z b §

SL

7630' FCL

I o.eoo*

i i 1-

SL J ^ ' L O l ••TO'FtL ,

^ 2730' FCL

PUBLIC INFOIWTION COPY

STANGAflO t>L PROOUCTION CO T f « A §

BLOCK A-2 IB

WELL LOCATION PLAT PROPOSED LOCATIONS

A, B.C.Q.B E

o- •. C s»Cf 0

Ir

PERFORMANCE & DIMENSIONAL

SPECIFICATIONS

ATTACHMENT A

KEYES 302

INDEX

Description Page No.

1. Equipment List 1

2. Rig Loading Information 5

3. Cantilever Beam Load Chart 6

4. Overall Dimensions 7

5. Innerbottora Tank Arrangement 8

6. Machinery Deck 9

7. Main Deck Arrangement 10

8. Spud Can Details 11

9. Leg Dimensions 12

10. Outboard Profile 13

KEYES 302

EQUIPMENT LIST

1. Prilling Unit:

Frlede & Goldman Design No. L780 - MOD 2 Cantilever Jack-Up Drillinq Unit, complete with :he following specifications: 9

(a) Hull Dimensions: 180' - 0" length x 175' - 0" width

(b) Water Depth Design Criteria:

300 ft. - 50 ft. wave; 100 knots wind (one minute average) 250 ft. - 5< ft. wave; 100 knots wind (one minute average) 200 ft. - 57 ft. wave; 100 knots wind (one minute average)

(c) Cantilever Extension: 40 ft. rotary centerline from stern of barge 10 ft. transverse movement each side of barge centerline.

(d)

(e)

Living Accommodations: 50 persons

Capacities:

Drilling Water Fresh Water Fuel Oil Liquid Mud Bulk Mud/Cement

2. Drawworks:

3. Mud Pumps:

4. Auxillary Pumps:

5. Derrick:

5200 bbl. 1348 bbl. 2481 bbl. 1874 bbl. 7925 cu. f t .

Continental Emsco C-2 Type I I , with 1-1/2M

drill line, nominal 20,000 ft. depth rating, driven by two (2) 900 MB DC electric motors rated 1,000 HP each, with an Elmagco Model 7838 dynamic brake.

Two (2) Continental Emsco FB 16C0 tr iplex pumps, rate 1,600 HP; 7" l iners, driven by two (2) 900 NB DC electr ic notors, with 5,000 psi f lu id end.

Six (6) Mission Magnum 5 x 6 centrifugal pumps for charging, mixing, mud-cleaning, desandlng and desi1 t ing.

Continental Emsco Model 20R0, 147 f t . x 30 f t . base mast, with a 1,400,000 lb . gross nominal rat ing, designed for a 100 mph wind with fu l l pipe setback.

1 10/20/84

Substructure:

Hoisting Equipment:

Rotary:

Power Equipment:

Air Compressors:

BOP and Controls:

50" x 40* x 25* Substructure, with a 50' x 40' drill floor structure. Maximum drill floor loading 1,200,000 lbs.

Continental Emsco RA 60-6 Traveling Block, 650 ton, with six 60" diameter sheaves grooved for 1-1/2" drill line.

B-J 5750 Oynaplex hook with positioner, 750 ton.

Continental Emsco Model LB 500 Swivel, 500 ton.

Continental Emsco Model T-3750, 37-1/2" Ro­tary, Independent drive with a 900 MB DC electric motor.

Varco Type Kelly BusMng/MPCH Master Bushing Unit for 5-1/4- Hex Kelly.

Three (3) EMD MD12E8 Diesel Engines Driving 1,050 KW continuous, 600 VAC, ABS rated generators.

One Caterpillar 3412 Diesel Generator Set with ABS rated 320 KW generator.

Ross Hill SCR Power Distribution System.

Two (2) 100 HP Rotary Compressors, Ingersoll Rand, each rated 400 CFM at 125 psi.

One (1) Refrigerated Air Dryer, Ingersoll Rand 300 CFM.

One (1) 11 BPD Air Compressor on rig floor.

One (1) Cold-Start Compressor, Ingersoll Rand, 45 CFM, with Lister Diesel Engine.

One (1) NL Shaffer Spherical Preventer, 21-1/4- bore, 2,000# WP RX-73 flange bottom, H2S service.

One (I) Diverter Spool with two (2) 6" valves.

One (1) NL Shaffer 13-5/8" Annular Pre­venter, 5,0001 WP with 5,0001 WP studded top and 10,0001 WP hub bottom connection, HoS Service.

2 10/20/84

? ! ! e J i ' C d m « P O n T yP« "U" Single Preventer.

? ; l / l 6 Ranged outlets, clamp hub con­nections, H2S service.

J ^ J i 1 C a m e r o n T yP« Double Preventer, 10.0001 WP with 5- pipe rams and blind rams, and four 3-1/16" 10,0001 WP flanged outlets, clamp hub connections, H2S service.

One (1) extra set of 5" pipe rams.

One (i) Choke Manifold, 10,0001 WP, 3-1/16" valves, with two adjustable chokes, provi­sion for two super-chokes, H2S service.

Two (2) Mud-Gas Separator.

5 2 ^ C 5 n t r o 1 U n 1 t " R o $ $ H 1 1 1 Controls Model C240-2E25-2AG, sixteen 15 gal. accumulators, two air pumps, two 25 HP triplex pumps, 374 9 a \ - r , e s e r v o 1 r . «nd seven station control manifold with remote electric operated station.

12. Mud Processing Brandt Oual Shale Shaker, double screen, two 3 HP motors.

One (1) Brandt Oual Mud-Cleaner and Oesil-ter, with sixteen 4" cones.

One (1) Pioneer SR-8-6 Desander with eight 6" cones. 3

Three (3) Brandt Mud Mixers, 20 HP. 1.750 rpm.

One (1) Degasser Unit, Wellco Modol 6200.

One (1) Shear gun for each mud pit.

Seven (7) Demco Mud Guns.

Two (2) Mission Mud Hoppers.

One (1) Seventy Cubic Foot Bulk Mud Surge Tank. '

13. Drill String; 12,000 ft. - 5" OD Grade "E" Drill Pipe with 5H XH Connections.

fM

,0?S ,ft* " 5" 0 0 G r a d t "G" Dr111 P*P« ̂ th 5" XH Connections.

Thirty (30) Joints - 5- 00 Hevi-Wate Drill Pipe with 5" X-Hole Connections.

3 10/20/81

Six (6) - 6-1/2" 00 Orill Collars witn 4-1/2" H-90 Connections.

Twenty-One (21) - 8" 00 Orill Collars with 6-5/8" H-90 Connections.

One (1) King Circulating Head with 4" and Z" valves.

One (1) EZ Torque Unit for make up and break out of BHA.

Necessary X-Over Subs, Kelly Subs, and Bit Subs for Contractor's dr i l l string.

14. Dr i l l Tools: One (1) Hex Kelly - 5-1/4" x 2-13/16" ID

One (1) Foster Model 77 Kelly Spinner, Elevators and Slips for dr i l l collars and 5" dr i l l pipe. (Kelly length will be at least 47 f t . )

One (1) Pipe Splnntr, Wtatherford-Lamb •Spinner-Hawk'.

Rotary Tongs, Type DB, 3-1/2" - 14-3/8".

One (1) Gray Inside BOP, 5" X-Hole Connections.

Two (2) Hydril 4-1/4" Kellyguards, 10,OOOf WP, 5" X-Hole Connections.

One (1) Omsco 5-1/4" Kelly Cock, 5,0001 WP, 6-5/8" API Reg. L. H. Connections.

15. Wireline Unit: Mathey Surveyor Wireline Unit with 25,000 f t . of .092" wireline.

16. Fishing Tools: Overshots to catch Contractor furnished dr i l l pipe and dr i l l co l lars .

4 10/20/84

f

KEYES 302

LOADING (KIPS)

Lightship Weight 13,055

Elevated Variable Loads

Drilling and Stand-by 4,080

Storm Survival 2,630

Preloading 11,650

Preload Jacking 7,201

Emergency Jacking 9,380

Maximum Hook Load 1,000

Maximum Rotary Load 1,000

Maximum Load at Bottom of Spud Cans - Dry 8,235

(During preload)

Maximum Bearing Pressure at Spud Cans 7.37 (During preload) (Klps/Sq. Ft.)

Spud Can Area (Sq. Ft.) 1116.9

KEYES 302

CANTILEVER BEAM LOAO CHART

300 385 470 555 640 725 640 555 470 385 300 40

440 519 598 677 756 835 756 677 598 519 440 33

580 653 726 799 872 945 872 799 726 653 530 26

720 776 832 888 944 1200 944 888 832 776 720 34

800 850 900 950 1000 1200 1000 950 900 850 800 32

900 933 967 1000 1000 1200 1000 1000 967 933 900 30

1000 1000 1000 1000 1000 1200 1000 1000 1000 1000 1000 28

1000 1000 1000 1000 1000 1200 1000 1000 1000 10C0 1000 26

iOOO 1000 1000 1000 1000 1200 1000 1000 1000 1000 1000 24

10.0 8.0 6.0 4.0 2.0 0.0 2.0 4.0 6.0 8.0 10.0

Distance Starboard of Hull Centerline to Centerline of Rotary (feet)

Weight 1s the combine allowable hook, rotary and setback (k ips ) .

Distance Port of Hull Centerline to Centerline of Rotary (feet)

Km

iTAXIOAlO • } • »0«T

STCM

1=3= • A Maximum allowable individual loads as follows:

o Hook o Rotary o Setback

1000 kips 1000 kips 450 kips

10/20/84

KEYES 302

7 03/28/84

KEYES 302

INNERB0TT0M TANK ARRANGEMENT

03/28/84

KEYES 302

03/28/34

KEYES 302

?PUP CAN PETAILS

12 - 03/28/84

r 7

GALVESTON AREA SOUTH ADDITION

ATTACHMENT C-l

STANDARD OIL PRQQUCTIOil rOfPAav

0RILLIN6 MUD CtptQMWf

Products of Oresser-Magcobar Dril l ing Fluids Strvict* arm i . I l lustration purposes. Equivalent I e l K r S u ^ $trv1c. companies such as IACO Services. Nllpark. and N.L. Baro*d* *

Tradt Name

Magcogel

Caustic

Lime

Rapid Mud

Nagccnol

Magcobar

K-l 7

Sptrstnt

Orlspac

Bicarb

KXP-20

KOH

ES-828-N

XC-Polymtr

Composition Purpose

Wyoming Bentonite; A naturally Provide good fllttr cake or'^i ?! I l T E * 5ont?|n1n« P^tts quality, flltratt control, of Silica and Alumina (Intrt). t vlscoslfltr for wattr

bast drilling fluid.

Sodium Hydroxide

Calcium Hydroxide

High Molecular Weight Anionic Liquid Polymer

2-ethylhexanol, 2-ethylhexyl alcohol

Barlte: BaSOa

Potassium Lignite

Chrome-Llgnosulfonate

Polyanionic Cellulose

Sodium Bicarbonate (Ne HC03)

Potassium Chrome Lignite

Potassium Hydroxide

Proprietary Guar Gum based polymer

Xanthen gum

Alkalinity Control

A salinity Control

V1scos1f1e<\ Imparts shale stabilization

Defoamer

Weighting Agent

Thinner, fluid loss additive, potassium source

Dispersant, fluid loss control

Fluid loss control and viscosifier

Treating out cement

Thinner, Inhibitor, fluid loss additive, and potassium source

Alkalinity source and potessium source

Shale encapsulator

Viscosifier and fluid loss additive.

Attachment E

Air Quality Review For

Galveston Area Block A-218 OCS-G-9063

Sohio Petroleum Company 9401 So«ithw°*t Fre«»wav

Suite 200 Houston, Texas 77074

Submitted to Ms. CyntSia Arnold

Regulatory Specialist

August 10, 1988

Prepared by John E. Chance & Associates, Inc. Regulatory & Environmental Division

Project No. 88-8131

John kZ. Chance & Assoc., Lie.

ATTACHMENT F

Projected Emissions Schedule for Project

I. General Information

Location of Facility - Galveston Area Block A-218 Name of Rig/Platform - Jack-up

Owner/Operator - Sohio Petroleum Company 9401 Southwest. Freeway Suite 1200 Houston, Texas 77074

Contact Person - Ms. Cynthia Arnold Regulatory Specialist

Project Start Oate - October 30, 1988 Project End Date - April 16, 1989

49,480 Feet to be Drilled 78 Miles Offshore

II. Total Emissions for Drilling

Total Time for Drilling 5 wells: 6 months

Projected Emissions (Tons/Month of Drilling)

Emitted Substance CO S02 N0X VOC Tc1

Drilling Operations 3.55 0.97 17.17 0.88 0.69

A. Transportation Emissions, Drilling

Projected Emissions (Tons/Month of Drilling)

Emitted Substance CO S02 VOC TSP

Crewboat 1.30 * 9.10 0.49 *

Supply Boat 0.03 0.03 0.17 0.02 *

Stand-by Boat 0.14 0.14 0.72 0.09

Helicopter 0.25 0.01 0.03 0.02 0.01

John E. Chance & Assoc** inc.

B. Miscellaneous, Drilling

Projected Emissions (Total Tons)

Emitted Substance CO so2 VOC TSP

Tow Tugboat(s) 4.32 * 19.98 1.60 *

Cementing Skid 0.16 0.05 0.74 0.06 0.05

Crewboat horsepower of 2,500 Galveston, Texas Waiting Time 4 hour(s) per trip

14 trip(s) per week

Supply Boat will 200 kw generator Galveston, Texas Waiting Time 10 hours(s) per trip

4 tr1p(s) per week

Scand-by Boat Generator rating 200 kilowatts Running 24 hours per day

Helicopter Galveston, 1exa.<>

10 trip(s) per week

To %g Tugboat horsepower of 4,500 Working for 6 day(s)

Cementing Skid horsepower of 400 Working for 1 day(s) per well

I I I . Project Summary, Total Emissions

Emitted Substance CO S02 N0X "0C TSP

All «ble (tons/yr) 62069 2597 2597 2597 2597

Projected Emissions (Tons/Year)

Year 1 25.63 5.81 122.97 6.86 4.16

Total Emissions are comprised of all Construction, Drilling, and Production Emissions.

Jkthn £ C h a n c e et Aemoc^ Ano.

III. Project Summary, Total Emissions (cont'd.)

This may Include the following which are not specified in each section:

- Welding machines and cranes utilized during construction and drilling operations.

- Crane(s), Generator(s), Heater Treater, and Compressor utilized during production.

IV. Findings of Air Quality Review

As per DOI-MMS regulations, this facility 1s exempt from further air quality review as it has been determined that Its operation will not have a significant adverse environmental impact on air quality. Calculated emissions are for a worst case condition. Actual emissions from this project will probably be lower.

V. Meth dology

Drilling - horsepower-hour/ft drilled method Boats - horsepower-hour method Helicopters - landing/takeoff (LTO) cycle method All Others - horsepower-hour method

VI. References

ATMOSPHERIC EMISSIONS FROM OFFSHORE OIL DEVELOPMENT AND PRODUCTION, EPA-450/3-77-026 (June, 1977).

COMPILATION OF AIR POLLUTANT EMISSIONS FACTORS, EPA Report AP-42 (September, 1985), 4th Edition.

* The EPA does not provide SO2 and TSP emission factors for boat engines or TSP emissions for diesel powered electrical generators.

John EL Chance & Aseotx-, Ano.