I-

Refer To: uV-2-2 OCT 17*63

.enneco 011 Exploration and Production Attention: Mr, D. R. Ln.lanc Pott Offlci x 39200 Lafayette, L^jlslana 7f>503

Gentlemen:

Reference Is made to your Initial Plan of Exploration and Environmental Report received Stptr*bar 30, 1983, for Lease OCS-6 MM, Block 78, Grand Isle Araa. This plan Includes the dril l ing of five uel Is.

In accordanca with 30 CFR 250.34, revised December 13, 1979, and our letter dated January 29, 1979, this plan has been determined to be complete as of October 17, 1983, and is nou being considered for approval.

Your plan control number is N-13S3 and should be referenced in your communica­tion and correspondence concerning this plan.

Sincaraly yours,

I Di • glfli J.McIntoib"

0. W. Solanas Regional Supervisor Offshore Operatiens Support

bcc: Lease OCS-6 5656 (OMS-2-3) 10MS-2-2 u/Puf)Hc Info. Copy of the plan and ER

MMekmatdoost:gtJ: 10/3/83 Disk 3b

OcU*t983 R e c o rds Management

**«0-Artan,

Tenneco Oil Exploration and Production Eastern Gulf Division

, PO e-»« 39200

Laf»yeM» LCwi»tana 70503 > (3l8»9ei-7000

I September 30, 1983

U. S. Department of the In te r io r Minerals Management Service P. 0. Box 7944 M e t a i r i e , Louisiana 70010

A t t e n t i o n : Mr. D. W. Solanas

Re: Exploration Plan Grand Isle Block 78 OCS-G-5656

S i r :

Attached please f ind nine (9) copies of the Exploration Plan, Ei.vlronmental Report and Consistency Cer t i f i ca t ion re la t i ve to Tenneco Oil Company's OCS-G-5656 lease 1n Grand Is le Block 78.

The Well Informacion Attachment, the Structure Map and the Schematic Cross Sect ion are considered proprietary data to be exempt from disclosure under the Freedom of Information Act and should therefore not te made available to the pub l i c or provided to any affected state or to the executive of any local government. In th is respect , proprietary data have been removed from a l l but f i v e (5) copies of the Exploration Plan.

Yours very t ru ly ,

0. R. Leblanc* Sr. Production Analyst

lTOCP>t1»A9 •<

PLAN OF EXPLORATION

GRAND ISLE AREA '

BLOCK 78 (OCS-G-5656) I

Tenneco 011 Company, the operator of the above referenced lease, proposes to

conduct exploratory dri l l ing operations on said lease for evaluating the

potential commercial quantities of oi l and/or gas.

Plans are to commence dri l l ing operations on or about January 15, 1984 for the

OCS-G-5656 Well No. A uti l iz ing the "Marlin I I I" jack-up r ig. This well will

require approximately 60 days to d r i l l . The remainder OCS-G-5656 wells will

be dril led at a later date, contingent on the results of the No. A well .

These wells will also require 60 days each to dr i l l and al l exploratory

operations will be completed by the end of 1988. I f these wells are dr i l led ,

1t 1s anticipated that the "Marlln I I I " will also do the dr i l l ing.

Attached are the dr i l l ing Hg specifications of the "Marlln I I I" indicating

the Important features thereof, including features pertaining to safety and

pollution prevention and control. This rig will be equipped with typical

pollution control equipment, Including, but not imited to storage f a c i l i t i e s ,

deck drains, sumps, drip pans, and sewage treatment f a c i l i t i e s . Life saving

appliances and firefighting equipment of the "Marlln I I I"" will be 1n accordance

with U.S. Coast Guard regulations.

Attached Is Tenneco 011 Company's "Final Shallow Hazard Survey for Grand Isle

78 and 79 and Site Clearance for Grand Is le Location A. This 1s

supplemented by a Potential Geological Hazards Survey conducted by Intersea

Research Corporation which has been previously submitted. A l ist ing of survey

equipment is included 1n this survey. Also attached 1s a locat ion plat of the

leased block r e l a t i v e to the shoreline which depicts ttie proposed surface l

locat jot). A descr ipt ion of the onshore base f a c i l i t y is "included. Water

depth In this area ranges from approximately 160' to 195'.

There is one proposed mult i-wel l surface location which w i l l u t i l i z e templates

and caissons as wellhead protectors. The fol lowing is the proposed surface

locat ion: 7300' FNL and 4000' FEL of Grand Isle Blork 78.

On the Well Information Attachment are the prooosed surface loca t ion , bottom

hole location, measured depth and to ta l ver t ical depth for each w e l l . The

structure map and schematic cross section re f lec t ing the most current

geological/geophysical in terpretat ion are attached fo r your review. These

attachments are considered proprietary data and should be exempt from

disclosure under the Freedom of Information Act (5 U.S.C. 552) and

implementing regulat ions (43 CFR Part 2 ) .

Please refer to the Ai r Emissions Section to comply wi th A1r Quality

Regulations 30 CFR 250.57.

A br ief descr ipt ion of equipment, personnel, and procedures to be employed for

preventing, repor t i ng , and cleaning up a pol lu t ion s p i l l , including equipment

and deployment and travel time is attached.

See the attached 11st of mud components to be used during the d r i l l i n g of

these wells.

Please refer to the Cer t i f icate of Coastal Zone Consistency and the

Environmental Report to comply wi th 30 CFR Part 250 and 15 CFR part 930.

MARLIN NO 3. a self-elevating mat type mobile drilling platform, is one of the largest and moat'versatile offshore drilling rigs ever bu.lt. It is capable of oper­ating in 245" of water with 45' wave clearance (air space) during hurricane season Through the remainder of the year it will operate in 265 of water with 25" wave clearance. (ft r space) MARLIN NO. 3 has air conditioned accommodations for a 50-man crew plus ample supply storage facilities for extended operations without frequent servicing

BARGE SPECIFICATIONS FLAG U S A OFFICIAL NAME Marlm No 3 OFFICIAL NUMBER 299974

LENGTH Mat 240 2feet Platform i64feet BREADTH Mat 180 1 feet Platform 109

feet. 6 incnes GROSS TONNAGE 5170 40 — Net 5170 0 BL'LDER Bethlehem Steel Corp

Beaumont Tex HULL NO No 6788 YEAR BUILT 1965

GENERAL DIMENSIONS The Marlin No 3 consists of threj principal parts

1 Tne mat or foundation is 240' long x 180' wide x 10' deep with a 2 scouring skirl Slot in mat is 100' long x 100 wide

2 The platform containing all working and living areas, heliport and eguipment Platform is 164' long x 109 6' wide x 20 molded depth at sides Slot in platform is 50" long x 50" wide

3 Three trussed columns ?V on a side x 339 long

FACILITIES & EOUIPMENT OUARTERS

Air conditioned quarters for 50 mer. including galley pantry, freeze and thaw walk-in reefer, office, hospital and storage areas Maximum occupancy of each room ia four men The galley is equipped with modern electrical appliances including steam table and baking and barbecuing equipment The mess room-galley is arranged for cafeteria style serving A large recreation room ia equipped with television, card table, and comfortable chairs for off-duty personnel

A laundry with commercial type washer, extractor, and dryer is provided for the convenience of the crew

A control room is provided topside for the complete operation of all lacking equipment

Fluorescent lighting is installed throughout the platform in both the quarters and machinery areas

A Hose McCann sound-powered telephone system provides units at 17 strategic locations throughout the platform and skid unit

A Bio-Pure Model BP30 SW M treatment plant is provided for normal domestic sewage The unit is power,»d by oil field electric motors It uses two aeration pumps and has a capacity of 3.000 gallona per day

STORAGE FACILITIES 4 Jrillmg-water tanks with a total capacity of 4.100

barrels

2 Potable-water tank; w th a total capacity of 550 barrels

2 Fuel-oil tanks with a total capacity of 1 500 barrels

3 Active mud pits with a total capacity of 1.300 barrels

1 Dirty lube oil tank with a capacity of 2.500 gallons

1 Fuel oil dav tank with capacity of i 700 gallons

2 Lube oil storage tanks with a total capacity of 850 gallons

6 Pressure tanks with a total capacity of 6.300 cubic feet Any of these tanks can be used for either Dante or cement A dual pneumatic pressure transfer system assists the loading, unloading and transfer­ring of bulk materials A surge tank and weighing scales are provided for the weighing and mixing of barite A surge tank is also provided for the mixing of bulk cement A pressure vessel is provided for unloading o' bulk materials delivered to the plat­torm in bulk cans Storage area is provided for 2.000 sacks of barite or cement

The pipe rack deck has adequate storage area for 15.000 of 5' drill pipe and necessary drill collars and 15.000' of 9 V O D casing

PAINTING AND CORROSION PROTECTION

All exterior surfaces of the platform and skid unit are coated with inorganic zinc and finished with an epoxy color coat

Interior machinery areas ot the platform are finished with an alkyd enamel coating

Columns are coateo witn inorganic zinc

M A R L I N NO. 3 C O N T . - Pacje 2

Interior surfaces of the f loodable compartments of the mat are protected by zinc anodes

Exterior surfaces of the mat and columns below the waterl ine are protected by an impressed current anode system of cathodic p ro tec t ion

interior surfaces of the buoyant compartments of the mat are coated with a pe t ro leum base inhibi tor

Interior surfaces of the dr i l l ing water and ballast tanks and voids are coa ted with petroleum base inhibi tor

Interior surfaces of the potable water tanks are coated with a petroleum base inhibitor, as approved by USCG and oth*r agencies for this use

S A F E T Y E O U I P M E N T

2 arucker Survival Capsu.es Model 9091 Each c • * ,ule has accommodat ions for 28 passengers, a tc 'st. water t ight food and water storage compart ­ments, and storage for too ls ano survival equ ip­ment Capsule is powered by 40 HP Model 4 107 LS Westerbeke Engine for a max imum loaded speed of A \ knots.

2 Model 20-201 ho ld ing p lat forms for the Brucker capsule to hold and suppor t the capsule to the ng platform

3 Six-man life floats

52 Life preservers

General Alarm System.

Fixed dry chemical- type f i re ext inguishing system

Light water type fire ex t ingu ish ing system

3 Fire stations

26 Portable fire ext inguishers

Set obstrurt on l ights

Fog signal

Resuscitator/ inhalator/aspirator

First aid kit that meets OSHA specif ications

Stretcher. Stokes Navy type.

Greene Rescue and Transpor t Splint

Stretcher designed to fit in a Bell 206 or Boelkow Helicopter but not necessar i ly l imited to these two ships

USCG approved fire f igh t ing system and safety equipment This inc ludes two fire f ight ing a lumi-nized suits with a comp le te , self contained breath­ing apparatus for each

M A C H I N E R Y A N D E Q U I P M E N T

Platform Jacking Equipment

6 Hydraulic pumping units, all dr iven by AC electnc motors wi th remote electric contro l f rom control console

18 Hydraulic cyl inders

1 Control console

Skid Unit Jacking Equipment 1 Hydraulic pump, driven by AC eiectnc motor and

control console

4 Hydraulic cyl inders with claw base jacks

Air Compressors

For bulk cement and mud systems two units Gardner-Denver ACH with 30 HP AC electric motors

For general service, two units Ingersol l-Rand Type 40. Model H40BH with 40 HP AC electric motors These units are connected to a common air receiver tank battery

For start-up air. one unit Ingersol l-Rand Type 30 Model 15T with Lister Diesel engine This unit is connected to the air receiver tank battery

Pumps

2 Vert icai-turbme. deep-well pumps Johnston 2-stage 12ES water- lubricated, rated at 1400 GPM at 106' total head, wi th 50 HP AC electric motors

3 Bilge pumps in pod houses. Johnson IOCS. 500 GPM 25' head with 5 HP AC electnc motors

2 Fire and bi lge pumps Mission 2" x 3" R11 centr i ­fugal, wi th 30 HP AC etectnc motors

2 Fuel oil transfer pumps Goulds Model 1942 size No 7 rotary, wi th 3 HP AC electnc motors

1 Dirty lube oil transfer pump Goulds Model 1942 size No 4 rotary, with i v , HP AC electric motor

Miscellaneous

1 Meco Model PEE 300KM disti l ler, wi th 40 HP AC electric motor for compressor Rated at 7 200 GPD

2 Pressure sots, all Roth Water Systems two 1 ' r HP pumps for potable water, two 1 ' ? HP pumps for sanitary wa te '

2 Unit Manner Model 500 whirley cranes wi th 50-ton capacity one with 75' boom and one with 85' boom located diagonal ly opposite pipe rack deck

1 National Type 2250-ER single-drum. 2 speed anchor wmch with 50 HP AC electnc motor Drum

M A R L I N N O . 3 C O N T . - P a g t 3

I

conta ins 1.540' of 1 ' ? " d iameter wire rope wi th max imum pull of 36.000 pounds

2 L inco ln Shield ARC SAE welders. Model S-7046. 400 amp electr>c motor dr iven

1 Danfor th type (light we igh t ) 12.000 lb anchor

1 A i r conditioning and heat ing system rated at 18 t o n s

1 S ing le sideband radio RF Mode l 201 -M. 10 channel mar ine radio telephone

1 In tech Model V-110. Manner VHF radio wi th all channels

1 K i n g remote platform tank gag ing system Gages located m ths control r o o m , calibrated to read m 42-gal lon barrels, and in feet and inches for each of 14 tanks

P O W E R E Q U I P M E N T

2 E M D SR16EW-567C. 1.950 HP diesel electric power packages. Each unit has one D-32 generator and t w o D-69 DC generators, comp le te with necessary generator and motor c o n t r o l cabinets drawworks a n d mud pump control pane ls These power pack­ages furnish power for the drawwor ' . , . dr i l l ing p u m p s , rotary and Ha l l i bu r ton pump unit

2 Caterpi l lar D-398 TAC each wi th a 500 KW AC e lect r ic generator, and one AC distr ibution panel These units furnish power for all platform electr ical equ ipment and auxi l iary d r i l l i ng equipment This inc ludes power for the hydrau l i c jacking system used for raising and l ower ing the platform

D E R R I C K . DERRICK S U B S T R U C T U R E A N D S K I D B A S E

1 S k i d base 30' x 50' wh ich spans the 50' wide dr i l l ing s lo t This unit supports t he derr ick substructure a n d contains a cellar deck level for the handling and s to rage of blow-out preventer equipment

1 Un i t i zed derrick subst ructure 30' x 30' with 48' x 54 steel deck area This subst ruc ture contains and suppor ts the drawworks un i t , rotary unit. Sch lum­berger unit, choke man i fo ld . B O P closing unit. B O P handling equipment (air-operated winch) , air receiver tank, hydraul ic power units, standpipe man i fo ld , derrick and derr ick equipment

Bo th of the above un i ts are equipped with hydraul ic lacking sys tems for jacking both longitudinally and transversely This allows the

rotary to be aligned for the dri l l ing of nine wells on eight foot centers within the 50' x 50 dri l l ing slot

1 Lee C Moore 30' x 30' base x 147' high welded-type derrick having 1 392.000 pounds capacity and 100 mph wind load capacity with 15.000' of 5" dri l l pipe racked Water table opening 6' x 8' complete with dri l l pipe and dri l l collar racking equipment, adjust­able monkey board, adjustable casing stabbing platform and metal wind breaks

1 Hutchison-Hayes heavy duty f luorescent l ight ing system for derrick derrick substructure, and cellar deck of skid base The dr i l l ing slot and pipe rack deck areas are l ighted by eight mercury vapor lights

H O I S T I N G A N D C O M P L E M E N T A R Y E Q U I P M E N T

1 National Type 162b D E drawworks nominal ly rated at 3,000 input horsepower, powered wi th two EMD Model D 69 DC electric motors. This draw-works unit «s equipped with a sand line reel having a capacity of 20.500' o ' wire line. Model 7838 Elmagco eddy current brake, complete wi th heat exchanger cool ing. National Model 6-B Micromatic dri l l ing contro l . Model TCB Crown-o-mat ic safety control , and Model 54 Coastai sand l ine guide

1 National Type 760F crown block with 60" diameter sheaves grooved for 1v," dri l l l ine, complete with sand line, cat l ine, and tugger line sneaves

1 National 660 G 500 hook-block assembly wi th 500-ton capacitv The traveling block has 52' diameter sheaves grooved for 1 " ? " dnd line

1 National Type N-1324 swivel equipped with a Foster Type 77 hydraul ic-powered kelly spinner and a 6 V O D Omsco 15.000 lb test safety valve

1 5V 4" x 54' overall API hexagonal forged alloy steel kelly with a 3 V ' bore

1 National C 365 rotary table unit wi th 367?" table opening The unit is powered by one EMD Model D 69 DC electric motor driving through a two speed. 500 HP gear transmission Equipped with split rotary master bushing. National p in- type kelly drive bushing and split-type master casing bushings

1 Set Kelco air operated power rotary slips for use with National pm dnve master rotary bushing

1 Set Foster 79 hydraulic powered dri l l pipe and casing tongs, complete Electric driven hydraulic unit wi th Vickers tandem hydraulic pumps

I A R L I N NO. 3 C O N T. - P a g t 4 .

1 Set Byron Jackson Type DB neavyv.eight rotary tongs, complete w i th four lug jaws anc hinge law assembly

2 Set Byron Jackson 5 " Type MGG center latch dr i l l pipe elevator. 275-ton rated capacity, wi th 18° taper.

1 Set Byron Jackson 2 3 /

4 " x 132 ' weldlsss elevator l inks 350-ton rated capaci ty

1 Set Byron Jackson Type SLA-100 center latch elevators with 7%" bore. 125-ton rated capaci ty for handling 7V," O.D dr i l l col lars

1 Set Byron Jackson 1 % ' x 72" wj ld less elevator links. 150-ton rated capaci ty for handling 7 * 4 " dri l l collars

1 Set Varco No 2550 - 5''?" t i . 7" DCSR dri l l col lar slips

2 Sets Varco 5" SDXL dr i l l pipe sups

1 Tufty rotary dr i l l ing ' ine. 1 % " diameter x 7.500' long

1 Galvanized plastic co re 6 x 7 sand line » V diameter x 15.000' long

1 Baash-Ross "CR" 6V?" to 7 \ " single screw safety c lamp

1 Martin-Decker Type " E " dr i l . ng control , consist ing of

a. AWE-6 weight indicator with E-80 Sensater pressure t ransformer unit for use with Nat ional Type E" wire l ine anchor

b. GM-4-501 c o m p o u n d mud gauge

c. National Type " E " wire line anchor complete with wire line snubber for use with 1 1

? " wire l ine

d. H 6A S tong to rque assembly

1 Ingersoll-Rand K4U A air tugger with 3.500 Ib single line pull at 85 psi air pressure Unit mounted on derrick floor for hand l ing dri l l pipe, etc

D R I L L I N G P U M P S A N D M U D S Y S T E M S

2 National N 1600. 7V 4 " x 16" dri l l ing pump uni ts Each un.t is powered by two EMD Model D 69 DC electric motors Each p u m p is equippea with Hydr i l Type K-20-5000 psi pulsat ion dampeners These units are piped wi th two 6" schedule 160. 5000 psi WOG mud discharge l ines wi»h 6". 5.000 psi WOG manifold valves. These pumps are control led f rom the pump room e nd the dri l lers pos't ion

3 Mission 6 x 8 R centr i fugal pumps with 13" impellers, powered by 50 HP 1.200 RPM AC electric motors These pumps are manifolded together and are for mud mix ing, desi l t ing. and pumping out sumps or preload tanks

2 Mission 2 x 3 R centr i fugal o u m p i wi th 1 T : " impellers, powered by 25 HP. 1.750 RPM AC electric motors These pumps are manifolded together and are used for transfer of dr i l l ing water

3 "L igh tn in" heavy duty mud agitators Model 324 TEQ 15 2 powered by 15 HP. 1.750 RPM electric motors These units are installed on the three active mud pits

1 L ightn in" chemical mixer Model NS 1 powered by a Vi HP. 1.750 RPM AC electric motor This unit is installed on the chemical tank

1 Hutchison-Hayes Rumba 102 Dual Shale Shaker

1 Swaco size 2-12 skid mounted desander unit with two size 112 Dorrc lones Equipped with 5 x 6 R Mission centr i fugal pump powered by 40 HP 1,750 RPM explos ion proof AC motors

1 King S" c i rcu lat ing head complete wi th King 4AR wire line str ipper

2 Goodal l 3V2'- x 75' 10 000 psi test rotary hoses for 6" schedule 160 stand pipes

1 Pioneer T16 4 cyc lone desilter unit w i th sixteen 4" clones

1 Swaco Hor izonta l Mounted Degasser Unit

1 Pioneer Decant ing mud centr i fuge system com­plete wi th two pumps

B L O W - O U T P R E V E N T E R S A N D A S S O C I A T E D E Q U I P M E N T

1 Cameron b lowout preventer assembly type ' U" triple unit Top unit has 13V ' . 10.000 psi WOG CIW 6BX (BX 159 nng) clamp connect ion Bot tom unit has 1 3 V ' . 10.000 psi WOG (3X 159 r:ng) f langed connec t ion Each unit has one 2 10.000 psi WOG and one 4" . 10.000 psi W O G f langed outie* below each set of rams Top and bo t tom unit? are equipped wi th 5" dri l l pipe rams and the middle unit is equipped wi th bl ind rams

1 Cameron No 20444-15 swing bolt c lamp assembly

2 Cameron 4 ' Series 1500. 10.000 psi WOG type FCC gate valves w i h hydraul ic operators

i Cameron 1 3 V ' 5000 psi Type D p lowout pre­venter Top has 1 3 V 5.000 ps. WOG (BX 160 ring) studded connect ion Bottom has 1 3 5

8 " 10.000 ps. WOC CIW 6BX (BX 159 ring) clamp connect ion

1 Regan 2 1 % " T / p e KF blow-out preventer The top and bottom of the preventer aie 20" series 600 studded connect ions

t Payne No 76 10 240 SE 240 gal lon automatic accumulator unit , consist ing of three 80 gallon. 3.000 psi WOG nonseparator Type S accumulators one 10 9 46 B pump, one DP 1092 C double plunger pump and a 250-gallon mounted f lu id tank. This unit has a sevsn valve fluid control mani fo ld , con­sisting of seven 3.000 psi WOG 4-way ramlok valves and a Payne Model 2760 regulator for regulatmg Hydn l operating pressure Unit is also manifolded into r ig skidding unit

1 Payne A 7 E seven valve air remote cont ro l un.t consisting of seven Y4". 250 psi W O G 4-way air valves and seven double-act ing atr cyl inders mounted on a 5.000 psi WOG fluid con t ro l valve

i 4-line. 10.000 psi choke ...anifold and fabricated gas separator unit is installed on derr ick f loor This unit also has a 4 " circulat ing line connected Thc high pressure Hal l ibur ton nne and mud stand pipe manifold are connected to the choke mani fo ld

1 Cameron 10.000 psi automatic dr i l l ing choke

2 Cameron 10.000 ps. positive adjustable dri l l ing chokes

2 20-ton capaci ty b low-uut preverter hand l ing units mounted on overhead trolley be;:ms to expedi te tne installation and removal of b.ow-out preventer equipment

4 IngerbOll-Rand Model HU air hoists wi th 2.000 pounds single l ine pull capacity at 80 psi air pres­

sure These units are installed on derncx sub­structure cellar deck to expedite the handling of b low-out preventer equipment

D R I L L P I P E , D R I L L C O L L A R S A N D T O O L S

12.000 feet. 5" Range 3 Grade E and 13.000 feet. 5" Range 3 Grade G seamless internal upset dri l l pipe with fine particle f lush type hardfacing. on tool joints Tool joints are 6 \ ' O.D x 5" X-hole

14 7%" O D x 2 1 3 / , 6 " I D x 43' long Dri lco dri l l collars wi th 8*4" API regular tool jo ints Box end of dri l l col lars have machined recesses to accommodate elevators and slips and el iminate the need for dni i collar clamp and lift i bs Special set of elevators and elevator bails are provided to expedite this dn ' l collar str ing when making trips Necessary suos for connect ing 5" dnl l pioe and dr i l l ing bits to these col lars

2 OMSCO S.000 psi W.P lower Kelly Valves

1 Gray Fig 162 Automatic b low-out preventer with release tool

1 Complete set of f ishing tools .'or all contractor furnished downhole tools

R E N T A L E O U I P M E N T

Hal l ibur ton cement ing unit wi th two HT 400 pumps Each pump is powered by en EMD Model D 79 DC electric motor Each pump is equipped with an automatic reset Kinzbach relief valve set at 12.000 psi One centr i fugal mix ing pump powered by a 40 HP AC electric pump

Schlumberger wire line electnc logging unit mounteo on the derrick floor so that the logging line can be run in the hole without the use of al ignment sheaves

MARLIN DRILLING CO., INC. 170 INDUSTRIAI PARKWAY

v P O BOX 51887. O.C.S

LAFAYETTE, LOUISIANA 70505

PHONES 1-318-732-6361

TELEX # 38661 \

MAKLIN NO. 3

SAFETY EQUIPMENT - POLLUTION "•REVEJTTICN EQUIPMENr

AND CONTROL EQUIPMENT

2 Brucker s u r v i v a l capsulas, Model 9091, accxjTirioda t ions f o r 28 passengers each, with Model 20-203 hr ld ing p la t fo rm.

2 6 man l i f e f l o a t s

52 (Plus) l i f e preservers

1 24 vo l t ba t t e ry , supplies general a^rm system USCG approved

1 Fixed dry chemical type f i r e extinguishing system

1 Greene rescue & transport s p l i n t

1 Stretcher, S t o k e ' £ Navy type

26 Portable f i r e extinguishers

1 Gas & Flammable vapor ind ica to r

1 Set obstruct ion l i g h t s

1 Resuscitatur - I n i t i a t o r - Aspirator w i t h (3) D cyl inder o f oxygen

1 Fog Signal

1 USCG approved f i r e f i g h t i n g system & safety equipment. This i n c l uried two f i r e f i g h t i n g aluminized su i t s w i th a complete se l f contained breathLig apparatus f o r each.

1 Model BP30 SVM j i o Pure sewage treatment u n i t .

COASTAL ZONE MANAGEMENT

CONSISTENCY CERTIFICATION

Exploration Plan Type of Plan

Grand Isle Block ̂8 Area and Block

OCS-G-5656 Lease Number

The proposed activities described in detail in this Plan cor^ly

with Louisiana's approved Coastal Management Program and will be

conducted in a manner consistent with such Program.

Arrangements have been made with the State-Times in Baton Rouge,

Louisiana to publish a public notice of the proposed activities

no later than October 18, 1983.

Tenneco Oil Company Lessee or Operator

J. L. Gregory s\ J (1 Vice Presiaent *• y^^f*1

Certifying Official V

September 30, 1933 TJate

ENVIRONMENTAL REPORT

EXPLORATION

GRAND ISLE, BLOCK 78

TENNECO OIL COMPANY

Exploration and Production

Lafayette, Louisiana

contact person

Don LeBlanc P. 0. Box 39200

Lafayette, Louisiana 70503 (318) 269-7781

September 6, 1983

prepared by

MERIDIAN RESEARCH CORPORATION Box 3804

L a f a y e t t e , Louis iana 70502-3804

(2) DESCRIPTION OF PROPOSED ACTION

(a) TRAVEL MODES AND ROUTES

Tenneco O i l Company plans to conduct exp lo r a to ry d r i l l i n g on Grand

Is le Block 78. As many as f i v e we l l s may be d r i l l e d beginning i n 1984.

The onshore v..support base w i l l be Fourchon, Lou i s i ana . I t i s expected that

a crew boat w i l l make a d a i l y round t r i p to the Block and a supply boat

a round t r i p every other day. Two round t r i p s d a i l y are expected f o r

h e l i c o p t e r s . The boats and h e l i c o p t e r s w i l l proceed d i r e c t l y to Block

78 from Fourchon, weather and t r a f f i c cond i t ions p e r m i t t i n g ,

( t ) SUPPORT BASE

The suppor t base w i l l be the Tenneco f a c i l i t y at Fourchon, Louis iana .

This base occupies a 7.5 acre s i t e w i t h 624 f e e t of water f r o n t a g e . F a c i l i t i e s

include w a t e r , d i e s e l f u e l , ga so l ine , l u b r i c a n t s , marine and i n d u s t r i a l

cleaners, a 65 ton crane, and a warehouse. These f a c i l i t i e s are considered

adequate to suppor t the e x p l o r a t o r y d r i l l i n g planned f o r Block 78 and no

expansion o f p h y s i c a l f a c i l i t i e s or the c r e a t i o n of new job p o s i t i o n s i s

an t i c ipa t ed .

(c) NEW SUPPORT FACILITIES

No new onshore support f a c i l i t i e s such as new land bases, r e f i n e r i e s ,

storage f a c i l i t i e s , pumping s t a t i o n s , boat docks, h e l i c o p t e r pads, or

fue l i ng f a c i l i t i e s are l i k e l y to be required because of a c t i v i t i e s

associated w i t h Block 78. Any new product ion tha t might u l t i m a t e l y r e s u l t

would most l i k e l y be processed i n the present onshore f a c i l i t i e s .

(d) NEW TECHNIQUES OR UNUSUAL TECHNOLOGY

No new techniques or unusual technology i s expected to be requ i red

f o r the opera t ions planned f o r Block 78.

(e) MAPS OF PROPOSED ACTIVITY

Louisiana i s the only a f fec ted state .

(f) TRANSPORTATION OF OIL OR GAS • .

Shfould hydrocarbons be d i scover i t i s l i k e l y that transportation to

shore would be through .the pipel ines on and adjacent to Block 78. Processing

would l i k e l y occur in che present onshore f a c i l i t i e s .

(3) DESCRIPTION OF THE AFFECTED ENVIRONMENT

(a) PHYSICAL AND ENVIRONMENTAL

(1) Commercial Fishing

Block 78 l i e s about 30 miles offshore with water depths in the 27-31

fathom range (162-186 f e e t ) . Th i s Block i s within National Marine F i sher i e s

Service Grid 13. This general area contributed heavily to the two most

important conmercial f i s h e r i e s in Louis iana. Shrimp (1980 catch statewide

of 88.7 m i l l i o n pounds with a value of $99.3 m i l l i o n ) , and menhaden (1980

catch statewide of 1.3 b i l l i o n pounds with a value of $56.6 m i l l i o n ) .

The majority of the menhaden are taken near the shore in shallow

water. Consequently Block 78 i s unl ike ly to contribute to this f i shery .

Tht Block l i e s on the seaward margin of the shrimp and indus tr ia l bottomfish

harvest areas off this section of the Louisiana coast . Therefore i t may

receive an occasional v i s i t from a commercial shrimper or indus tr ia l

bottomfish trawler , but i s not l i k e l y to support a heavy f i sh ing e f f o r t

because of i t s marginal locat ion .

Reef type f ishes such AS snapper and grouper are found in waters of

the depth and s a l i n i t y of B?ock 78. However, most of these type f i shes are

taken over hard bottoms or around production platforms. There are very few

platforms in the v i c i n i t y of Block 78 and no hard bottom or snapper banks

nearby. Consequently, this Block i s marginal at best for commercial fishermen

seeking reef type fishes. Should a discovery occur, and one or more platforms

be set, this Block could well become attractive to comni.*rcial fishermen

For the reason* noted above no detectable impacts are expected to

commercial fishermen as a result of the exploratory d r i l l i n g planned for

Block 78. An area noted as important to hook and lin e fishermen l i e s about

6-8 miles southwest of the Block, but is considered too far away for any

potential impacts from the planned d r i l l i n g .

(2) Shipping

A shipping fairway occupies a small part of the eastern portion

of Block 78. No rigs or structures w i l l be placed in t h i s fairway and

any hydrocarbons beneath the fairway w i l l be reached through directional

d r i l l i n g . Also the d r i l l i n g r i g w i l l have the required navigational aids

to avoid the p o s s i b i l i t y of a c o l l i s i o n in the event that a boat should

venture outside of the fairway.

(3) Recreation

Sport f i s h i n g is the predominant recreational pursuit in the waters

off the Louisiana coast. The Grand Isl e area is well known for the productivity

of the offshore waters and as a base for fishing ventures. Block 78 does

not offer s u f f i c i e n t potential to at t r a c t many of these fishermen. The most

favored areas are those with hard bottom or snapper banks and petroleum

production platforms. Neither of these conditions exist on or immediately

adjacent to Block 78. Consequently Block 78 is expected to support only

a very l i g h t recreational f i s h i n g e f f o r t . Such a c t i v i t y i s l i k e l y to consist

of t r o l l i n g for near-surface species such as mackerel while in tr a n s i t to

function of production platforms.

more a t t r a c t i v e areas. Consequently no impacts are a n t i c i p a t e d to sport

f i s h i n g as a r e s u l t of the d r i l l i n g scheduled f o r Block 78. r i

(4) Cultural Resources

• fBlock 78 l i e s beyond the zone where a cu l t u r a l resources survey i s

required. w ;

(5) Ecologically Sensitive Features

No ecologically sensitive features have been ide n t i f i e d on or immediately

adjacent to Block 78. A small area classified as important to hook and line

fishermen l i e s about 6-8 miles to the southwest of the Block. However, this

area is not classified as ecologically sensitive.

(6) Pipelines and Cables

Tenneco Oil Co. is aware of the location of any such f a c i l i t i e s found

on Block 78 and has sited i t s wells to avoid any damage or disruption to

these f a c i l i t i e s .

(7) Other Minerals

There are no known plans at this time for the production of minerals

other than hydrocarbons from Block 78.

(8) Ocean Dumping

Ocea . dumping is prohibited in this area.

(9) Endangered or Threatened Species

The Endangered Species Act of 1973 provides for the conservation of

endangered and threatened species and their habitats. Endangered species

of known or possible occurrence in the coastal waters o f f Louisiana are

the A t l a n t i c ridley t u r t l e , hawksbill t u r t l e , leatherback t u r t l e , sperm

whale, sei whale, finback whale, blue whale, humpback whale, and rig h t

whale; the green sea t u r t l e and loggerhead t u r t l e , considered threatened

4

species, a l s o occur i n the Gul f waters o f f the Louisiana coast . Because

the leatherback. anc* loggerhead t u r t l e s are the more pelagic of the sea

t u r t l e s l i s t e d above, these species are the most l i k e l y to occur i n the

I j projec t a rea .

. Records ind ica te tha t the sperm whale and f inback whale have the

highest f requency of occurrence, of the endangered whales l i s t e d above,

in the n o r t h e m G u l f . The present occurrence o f the remaining species i i

the area appears ques t ionable , based on data compiled by Schmidly (1931).

Some dis turbance of whales and sea t u r t l e s by d r i l l i n g and support vessel

a c t i v i t i e s may occur. However, there i s no s c i e n t i f i c evidence to Ind i ca t e

that t h i s -ype of dis turbance has been s i g n i f i c a n t i n the popu la t ion dec l ine

of these spec ies . In f a c t , recent research ind ica t e s tha t t u r t l e s are

being k i l l e d f rom ea t ing p l a s t i c t r a s h , tha t when f l o a t i n g i n the water ,

appears to resemble j e l l y f i s h (a f a v o r i t e food of the t u r t l e s ) . I n summary,

no s i g n i f i c a n t Impacts are a n t i c i p a t e d to endangered or threatened species

as a r e s u l t o f the exp lo ra to ry d r i l l i n g planned f o r Block 78.

(b) SOCIO-ECONOMIC

(1) RELATED NEW EMPLOYMENT

Not a p p l i c a b l e at t h i s t i m e .

(4) UNAVOIDABLE ADVERSE IMPACTS

Gallaway (1981) completed an extensive review of petroleum a c t i v i t i e s

l n the Texas-Louisiana c o n t i n e n t a l shel f r e g i o n . P o t e n t i a l negat ive

impacts addressed by Gallaway were discharge o f d r i l l c u t t i n g s , d r i l l i n g

f l u i d s , and produced fo rma t ion waters and o i l s p i l l s .

D r i l l c u t t i n g s are smal l fragments of the fo rma t ion cut by the d r i l l

b i t and discharged i n t o the water from the equipment which separates the

5

• i •

cuttings from the d r i l l i n g f l u i d (mud). Dumping of d r i l l cutt ings occurs

ox) an almost continuous basis during d r i l l i n g . Ip shallow water these

|ci|ttings accumulate in p i l e s on the seafloor around* the well head. In

deeper water, especially where there are strong currents, these p i les

tend to be smaller or almost non-existent. Any immobile benthic fauna

beneath such a p i l e w i l l be smothered. In time the debris p i l e set t les

Into the seafloor and is recolonized by bottom dwelling species.

The discharge of d r i l l i n g f l u i d s usually occurs 8 to 10 times during

the d r i l l i n g of a single w e l l . A small amount of d r i l l i n g f l u i d or mud

enters the water column during active d r i l l i n g as the cuttings are

dumped. Adhering mud washes f ree and the smaller cuttings combine wi th

the mud to form a turbid plume which extends downstream or down-current

from the r i g . Flocculated clay par t ic les usually set t le out r e l a t i v e l y near

the r i g whereas the plume may extend to distances from 1,600 to 3,200

feet from the point of discharge. Di lu t ion tends to be rapid and the

effect on water quality i s minimal. Within the t u r b i d i t y plume, l i g h t

penetration i s reduced and t h i s may cause a reduction in primary production

of phytoplankton. The d r i l l i n g f l u i d s tend to be r e l a t ive ly non-toxic ln

the concentrations encountered near active d r i l l i n g s i tes .

Due to the small amount of commercial t rawling ln the project area

the loss of several acres of seabottom from that potent ia l ly available i s

not expected to have any impact on commercial f i s h i n g . Likewise no impacts

are expected upon recreational f i s h i n g .

Oi l s p i l l s are always a p o s s i b i l i t y , however, good industry practices

and close adherence to applicable rules and regulations has greatly reduced

the chances of a s igni f icant s p i l l .

6

D r i l l i n g and support vessel a c t i v i t i e s may cause a l imi ted disturbance

of any whales or t u r t l e s in the area. However, no s c i e n t i f i c evidence has

beep found that indicates that t h i s type of disturbance has been s ign i f i can t

n in fche decline of whale and t u r t l e populations. The hunting of whales for

food and other products and the destruction o f t u r t l e nesting grounds and

the use of t u r t l e s fo r food have been the primary causes of the population

declines of these species.

In summary the adverse impacts associated wi th exploratory d r i l l i n g

on Block 78 are considered to be minor, local ized, and temporary. No

signif icant or i r revers ib le damage to the marine environment or to man's

use of i t i s Indicated.

(5) REFERENCES

B r i g h t , T. J . , and R. Reza'c 1976 " F i s h i n g Banks C. the Texas Cont inen ta l S h e l f " , i n : B u l l i s ,

H. R . , J r . , and A. C. Imes, eds. Proceedings: Colloquim on Snapper-Grouper Fishery Resources of The Western Central A t l a n t i c Ocean. Texas A & M U n i v e r s i t y Sea Grant Col lege , Mississ ippi-Alabama Sea Grant Consortium', and F lo r ida Sea Grant College Program. College S t a t i o n , Texas; B i l o x i , M i s s i s s i p p i ; and G a i n e s v i l l e , F l o r i d a .

Christmas, J . " . , and D. J . E tzo ld 1977 "The Menhaden Fishery of the Gulf of Mexico, United States:

A Regional Management P lan" . Gulf Coast Research Lab . , Ocean Springs , Miss .

Conant, R. 1975 A F i e l d Guide to R e p t i l e s and Amphibians of Eastern and Cent ra l

Nor th America. Houghton M i f f l i n Company, Boston.

F r i t t s , 7. H. , & R. P. Reynolds 1981 " P i l o t Study of the Marine Mammals, B i r d s , & T u r t l e s i n OCS Areas

of the Gulf of Mexico", Ub Fish & W i l d l i f e Ser . , O f f i c e of B i o l o g i c a l Se rv ices . Washington, DC. FWS/OBS-81/36.. 139oo.

.Gallaway, Benny J . 1981 An Ecosystem Analys i s of O i l and Gas Development on The Texas-

Louis iana Cont inenta l S h e l f . U. S. Fish and W i l d l i f e Service , O f f i c e of B i o l o g i c a l Serv ices , Washington, D. C. FWS/OBS-81/27. 89pp.

Lowery, G. H., Jr. 1974 The Mammals of Louisiana and i t s Adjacent Waters. Louisiana

State University Press, Baton Rouge, 65lpp.

Mumphr^y, A. .T., Jr., and G. D. Carlucci, Jr. 1978 "Environmental Planning for Offshore Oil and Gas". Volume

V: Regional Status Reports. Part 3: Gulf Coast Region. The Conservation Foundation, Washington, D. C, U. S. Fish and W i l d l i f e Service, Biological Services Program, FWS/OBS-77/61.3, 158pp.

Schmidly, David J. 1981 "Marine Mammals of the Southeastern United States Coast and

the Gulf of Mexico". U. S. Fish and Wi l d l i f e Service. Office of Biological Services, Washington, D. C, FWS/OBS-80/41, 163pp.

Sea Grant College 1980 Draft Environmental Impact Statement and Fishery Management

Plan and Regulatory Analysis and Proposed Regulations, Reef Fish Resources of the Culf of Me>:i-0. Gainesville, Florida.

South Atlantic Fishery Management Council 1979 Fishery Management Plan for the Atlantic B i l l f i s h e s : White

Marlin, Blue Marlln, S a i l f i s h , and Spearfish. Miami, Florida.

Southeast F i she r i e s Center 1978 Fishery Management Pla.i f o r Groundfish (Culf of Mexico) .

P r e l i m . D r a f t , Na t . Marine Fisher ies Service , Miami, F l o r i d a .

UL S Department, of Commerce • I 1980 F i n a l Environmental Impact Statement f o r The Louisiana Coastal

Resources Program. O f f i c e of Coastal Zone M«t . , Washington, DC.

U . S . Department of Commerce 1980 F ishery S t a t i s t i c s of The United S ta tes , 1976. NOAA, S t a t i s t i c a l

Diges t No. 70, Washington, DC.

U. S. Department of Commerce 1980 Marine Recreat ional Fishery S t a t i s t i c s Survey, A t l a n t i c and

Gul f Coasts, 1979. NOAA, Current Fishery S t a t i s t i c s , No. 8063, Washington, DC.

U. S. Department of the I n t e r i o r 1982 D r a f t Regional Environmental Impact Statement, Gulf o f Mexico.

Mine ra l s Management Service , M e t a i r i e , Louis iana .

van L o p i k , J .R. , K. H. Drumraond, and R.E. Condrey 1979 D r a f t Environmental Impact Statement and Fishery Management

Plan f o r the Shrimp Fishery of the Gulf of Mexico, United Sta tes Waters. Center f o r Wetlands Resources, Louisiana State U n i v e r s i t y , Baton Rouge, Louis iana .

Ward, C . H . , M.E. Bender, and D . J . Reish, Eds. 1979 The Offshore Ecology I n v e s t i g a t i o n , E f f e c t s of O i l D r i l l i n g

and Production i n A Coastal Environment. Rice U n i v e r s i t y S tud ies , V o i . 65, No. A and 5 . , Houston, Texas.

• I •

(6) STATEMENT

• | , The proposed a c t i v i t y w i l l be carried out and completed with the M

guarantee of the fo l lowing items:

(a) -The best and safest techniques w i l l be u t i l i z e d thgoughout the pro­

jec t . This includes meeting a l l applicable requirements for equipment

types, general project layout , safety systems and equipment and monitor­

ing systems.

(b) A l l operations w i l l be covered by a Minerals Management Service

approved o i l s p i l l contingency plan.

(c) A l l applicable Federal, state, and local requirements regarding a i r

eulssion and water qua l i ty and discharge f o r the proposed a c t i v i t i e s , as

well as any other permit condit ion, w i l l be complied wi th .

MAP SHOWING PROPERTY OF

FOURCHON DOCKS INC. IN

SECTIONS .13 a 24 OF

T-23-S - R- 22' E IN

LAFOURCHE PARISH, LOUISIANA

FOURCHON DOCKS INC.

I

MAP SHOWINC PROPERTY OF

FOURCHON DOCKS INC. IN

SECTIONS 13 8 24 pF

T-23S - R-22-E. IN

LAFOURCHE PARISH, LOUISIANA

The Well Information Attachment, the Structure Map, and Schematic Cross

Section are considered proprietary data to be exempt from disclosure under

the Freedom of Information Act and should therefore not be made available

to the public or provided to any affected state or to the executive of any

local government. In this respect, proprietary data have been removed

from all but five (5) copies of the Plan of Exploration.

» I.

I •

AIR QUALITY CALCULATIONS

EXPLORATION

GRAND ISLE^ BLOCK 78 ' •

Emission ^calcula t ions are based upon the d r i l l i n g of f i v e w e l l s . Operations

are expected to begin in 1984 and to continue through 1986. Actual d r i l l i n g

time is expected to t o t a l 250 days. The estimated combined t o t a l measured

depth f o r the w e l l s i s 59,430 f e e t . Fuel consumption f o r the r i g i s

estimated a t .2212 barrels per d r i l l foo t (New England River Basin Comm.,

Factbook, 1976). Dai ly consumption would thus t o t a l 2,105 ga l lons . Deta i l s

of the c a l c u l a t i o n s are presented i n Tables 1-3. A l l projected emissions

are below the maximums and t h i s operat ion i s t h e r e f c ' e exempt.

TABLE 1

PRO-IEC TED AIK EMISSION WELLS A-E BLOCK Grand I s l e 78

r

TAKEOFF F l fLOH-RINNING & LAND- SUMPTION

FMISSION SOlHtrr- TIME/DAY INGS/DAV GAI.S/DAY

DRILLING RIG

CARGO BOAT (IN BERTH)

CREW BOAT (IN BERTH)

IH.lOnPTFR TAKE-OFF & LANDINGS

24 hrs.

2 hrs.

2 hrs.

2105

4

SO 2 NO

EMISSION FACTORS POWD/1,000 CAES.

"CO TSP VOC SO 2 NO

KMI S31ON FACTORS AIRCRAFT TAKEOFFh LANDINGS

"(CO TSP VOC

PKOIIMTIP FMISSION 1-UAY I'KO.»ECT I ON TN *

SO/ N0X 1.0 TSP VOC.

31.2 469 102 33.5 37.5

31.2 469 102 33.5 37.5

31.2 469 102 33.5 37.5

65.7 987 215 70.5 7H.9

0.1 1.9 0.4 0.1 0.2

0.1 1.9 0.4 0.1 o % r

•18 -57 5.7 .25 .52 0.7 2.3 23 1.0 2TTJ

Projected emissions are based on data from "Compllai lon of Al»" Pol lu tant Emission Factors", 3rd E d i t i o n AP-42, EPA, 1977. Table 3 .3 . J . -1 and Tnble 3 . 2 . I . - 3 .

1-DAY TOTAL 66.6 993 239 71.7 8 f . 3

ABOVE Nl " RS IN POINDS _

TABLE ,2 .

AREA Grand Isle BLOCK 78 WELLS A-E

PROJECTED EMISSIONS FROM EACH SOURCE

BY AIR POLLUTANT FOR 198A-86 TeaT

DRILLING OPERATIONS - WELLS

SOURCE AIR POLLUTANT (T/YR) SOURCE S02 N0X j CU | TSP VOC

Dri l l ing Rig Projected Emissions lb/day 65.7 987 215 70.5 73.9

Transportation-Cargo Boat, Crew Boat, & HelicoDter lb/day 0.9 6. 1 23.8 1.2 2.4

SUB-TOTAL lb/day 66.6 993 239 71.7 81.3

Miscellaneous 25% of Sub-Total 16.7 2A8 59.8 17.9 20.3

TOTAL in lb/day S3.3 12A1 299 89.6 102

TOTAL in Tons/year 10.A 155 37.3 11.2 12. /

TABLE 3

AREA Grand Isle

3400 ( » 2 / 3 ) E

E = 33.3 D

BLOCK 78

EXEMPTION CALCULATION'S

for carbon monoxide

WELLS \-E

for sulfur dioxide, nitrosren cxides, total suspended particulates, and volatile organic compounds

D

E

E

30

32,822

999

Statute Miles

CO

SOo, NOx, TSP, and VOC

1984-86 HIGHEST YEAR

POLLUTANTS "E" (T /YR. )

PROJECTED EMISSIONS ( T / Y r . )

EXEMPT

S02 999 10.4 yes

NOx 999 155 yes

CO 32822 37.3 yes

TSP 999 11.2 yes

VOC 999 12.7 i

yes

E = The emission exemption amount expressed in tons per ye*.r.

D = The distance of the facility from the closest • 'shore urea of * state express i d in statute miles.

ALERT PROCEDURE

This Alert Procedure will become effective immediately upon the observance of an oil or hazardous material spill from a company installation of any kind which could possibly pollute shorelines, coastal or inland waters, or the open sea, or which could damage, foul or' endanger any property or wild­lif e onshore or offshore. • ,

INTERNAL ALERT PROCEDURE:

(1) Any Company employee observing an oV or hazardous material spill of any quantity must immediately notify his supervisor (MANDATORY NOTIFICATION).

(2) The supervisor will confirm the s p i l l , its cause and basic nature, and notify the area engineer responsible for the area concerned. All of the information reqjired on the "Report of Oil or Hazardous Material" is to be provided (MANDATORY NOTIFICATION).

(3) The area engineer will make a preliminary determination of the seriousness of the spill and notify the div'sion production superintendent, and the production manager operations. The area engineer will make an information report to his supervisor.

(4) The production manager operations, and in his absence, the division pro­duction superintendent, will assess the seriousness of the spill and i f the situation requires i t , he will notify the division production manager and appropriate members of the contingency task force. Calling the con­tingency task force into operation is under the authority of the oroduc­tion manager operations and in his absence, the division production superintendent.

Situations requiring activation of the contingency task force are to be re­ported to the Houston office by the person activating the contingency task force and providing at least the spill report information.

EXTERNAL ALERT PROCEDURE:

The responsibility for the notification of an oil or hazardous material spill rests with any company employee observing a s p i l l . The employee must immedi­ately notify his supervisor who will follow the procedures in this manual to notify the appropriate governmental agencies (MANDATORY NOTIFICATION).

Any person other than an employee (visitor, contractor personnel, or third party) must immediately notify a company representative. The employee will then use the External Alert Procedure (MANDATORY NOTIFICATION).

Procedures defined in the following memorandums are to be followed in report­ing spills.

REPORTING OF OIL SPILLS OR SPILLS OF HAZARDOUS MATERIALS

QCS LEASES —» • The fol lowing, governmental agencies w i l l be no t i f ied depending on the amount s t i l l e d : (ALL- SPILLS WILL BE REPORTED)

LESS THAN 6.3 BARRELS: , U. S. Coa'st Guard immediately, M.M.S. o ra l l y wi th in twelve (12) hours. Confirm oral reports in wr i t i ng on s p i l l report f o m .

OVER 6.3 BARRELS: U. S. Coast Guard, M.M.S. Oil and Gas Supervisor, M.M.S. D i s t r i c t Supervisor immediately and o ra l l y . Oral ly to the EPA Regional Admin­i s t r a t o r . Confirm a l l oral reports in wr i t ing on s p i l l report f o m .

Al l sp i l l s shal l be reported to the U. S. Coast Guard immediately. Spi l ls less than 6.3 barrels shall be reported to the appropriate M.M.S. D i s t r i c t Office in the fol lowing manner:

I f t h e s p i l l occurs during the dayl ight hours of 7:00 A.M. through 5:00 P.M. Monday through Sunday, ca l l the i r o f f i c e and report s p i l l to the radio operator. I f the s p i l l occurs at n ight , report s p i l l the fol lowing day.

I f the s p i l l i s 6.3 or more barre ls , no t i f y the appropriate D i s t r i c t Super­visor immediately. Their answering service w i l l give you the i r number.

The infornat ion required by the governmental agencies i s :

Location of s p i l l , date and time s p i l l occurred, amount and type material l o s t , cause of incident and correct ive action taken, size of s l i c k , co lora t ion, d i rec t ion of movement, and weather condit ions.

I f sp i l l is a d i rec t resul t o f a load-out inc ident , the addit ional infornat ion w i l l be required:

Name of Captain, his home address and telephone number, Z Card Name, cal l sign and agent.

Chemical dispersents w i l l not be used on s p i l l s pr io r to obtaining approval from the appropriate governmental agencies.

EOUIPMENT

Tenneco Oi l Company is a member of Clean Gul/ Associates and w i l l ca l l upon them, in the event of a s p i l l . Also, we are a member of the Offshore Operator's Committee. This Committee maintains an inventory of member companies' equipment that is avai lable for use by other members.

ha

Clean Gulf Associates has a major base at Grand Isle, Louisiana.

All procedures and equipment are designed to be in compliance with OCS Order *7 (Pollution and Waste Control). Equipment to be used would mainly include the following:

I . FAST RESPONSE, SKID MOUNTED SKIMMER SYSTEM

A. Nearest Location - Grand Isle, Louisiana B. Response Time - Two (2) hours load-out, four (4) hours

travel • Six (6) hours

C. Personnel Required - Four (4) men per shift

I I . BARGE-MOUNTED, HIGH VOLUME, OPEN SEA SKIMMER SYSTEM

A. Nearest Location - Grand Isle, Louisiana B. Response Time - Two (2) hours load-out, four (4) hours

travel = Six (6) hours C. Personnel Required - Thirteen (13) men per shift

I I I . HELICOPTER SPRAY SYSTEM A. Nearest Location - Grand Isle, Louisiana B. Response Time - One (1) hour load-out, one (1) hour

travel • two (2) hours C. Personnel Required - Two (2) men per shift

Description Dowell Fluid Services

IMCO Services Baroid Magcobar Milchem Pnm«,ry Appiication

ORILLING FLUID ADDITIVES

Barite DOW Bar IMCO Bar Baroid Magcobar Mil-Bar For increasing mud weight

Bentonite

i DOW Gel IMCO Gel Aquagel Magcogei Mil-Gel Viscos.ty and filtration

ccntrol in water-base muds

Attaoulgite DOW CeGel IMCO * Brinegel

Zeogel Salt Gei Salt Water Gel

Salt water viscosifier

DISPERSANTS

Sodium Acid Pyrophosphate DOW Sapp Sapp Sapp Sapp Sapp Thinner for low pH

fresh-water

Sodium Tetraphosphate DOW Phos IMCO Phos Barofos Magco-

Phos Oil Fos Thinner for low K H

fresh-water

Modified Tannin Desco Desco Desco Desco Desco Thinner for fresh-water and „ait water muds alkalized for pH control

Processed Lignite DOW Lig IMCO-Lig Carbonox Tannathin Ligco Dispersant. emulsifier and

supplementary additive for fluid loss control

Causticized Lignite DOW CeLig IMCO Thin CC-16 Caustihg Ligcon Caustic-lignite dispersant.

emulsifier. and supplemen­tary fluid-loss additive

Modified Lignosulfonate DOW 7 ^erse IMCO VC-10 vj-Broxin Spersene Uni-Cal Dispersant and fluid-loss

control additive for water-base muds

FLUID LOSS CONTROL AGENTS

Pregelatizined Starch DOW Celoid IMCO Loid I m perm ex My-Lo

Jel Milst?rch Controls fluid IOCS in

saturated salt water, lime a.id SCR muds

Sodium Carboxy-Methyl Cellulose

DOW CMC

(Regular)

IMCO CMC

(Regular)

Cellex

(Regular)

Magco CMC (Regular)

Milchem CMC i Med-Vis)

For fluid loss control and bante suspension in water-base muds

Sodium Carboxy Methyl Cellulose

DOW CMC

(Hi-Vis)

IMCO CMC

(Hi-Vis)

Cellex

'Hi-Vis)

Magcc CMC (Hi-Vis)

Milchem CMC (H.-Vis)

For fluid-loss control and viscosity ra id ing in low solids muds

Polyanionic Cellulosic Drispac Drispac Drispac Polymer

Drispac Drispac Fluid-loss control additive and viscosifier in salt muds

DOWELL FLUID SERVICES

I / i QOMPAftATWE PRODUCTS

DMC-2

Dowell P id Description Services

IMCO Services Baroid Magcobar Milchem Primary Application

FLUID LOSS CONTROL AGENTS (cont.) Potafiionic Celupsic Drispac Polymer SuperLo

Drispac Drispac SuperLo SuperLo

• Dnspac SuperLo

Drispac SuperLo

Primary fluid-loss additive, secondary visccsifler in salt muds

LUBRICANTS, DETERGENTS, EMULSIFIERS, SURFACTANTS, OEFOAMERS Processed Hydrocarbons Soitex Soitex Soitex Soitex Soitex Used in water-base muds to

lower downhole fluid loss and minimize heaving shale

Water Dispersible Asphalts DOW

WallKote IMCO Holecoat

StabilHole ITI-WD Lubricant and fluid-loss reducer for water-base muds that contain no diesei or crude oil

Oil Soluble DOW Surfactants Wall Free

IMCO Skot-Free Freepipe

Pipe Lax Petrocote Nonweighted fluid for spotting tu free differentially stuck pipe

Blend of fatty acids, sulfonates and asphaltic DOW Sacked materials WallFree

IMCO Spot SF 100

Invert emulsion that may be weighted to de sired density for spotting to free differentially stuck pipe

Detergent DOW DMD IMCO MD Con Det D-D Milchem MD

Used in water-base muds to drop sand, reduce torque and minimize bit-balling

An Organic Entity Neutralized with DOW Amines BioLube

IMCO Torq Trim LubriKleen

DOS-3 Mil-Plaie 2

Supplies more lubricating properties than oils without environmental pollution

Liquid Surface Active Agent DOW IMCO

Defoamer Dofoam-L Defoamer for water-base muds

L9?T qre^TTW MATERIALS Fibrous Material DOW Fiber IMCO Fiber Fibertex Mud Fiber Mil-Fiber Filler as well as matting

material Nut Sheila-

Fine DOW PLG-F IMCO Plug Wall-Nut Nut-Plug Mil-Plug Most often used to prevent lost circulation

Medium DOW PLG-M IMCO Rug Wall-Nut Nut-Plug Mil-Plug Used to regain lost circulation

DOWELL FLUID SERVICES C O M P A R A T I V E r H U U U C T b

PMC I

J

Description Dowell Fluid Services

IMCO Services Baroiri Magcobar Milchem Primary Appl icant

LOST CIRCULATION MATERIALS (cont.) Nut Sh4ll4

Coarse/ DOW PtG-$ IMCO Plug Wall-Nut Nut-Plug Mil-Plug Used where large crevices

or fractures are encountered Ground Mica:

Fine DOW Miea IMCO Myca Micatex Magco-Mica

Milmica Used for prevention of lost circulation

Coa'se DOW Mica IMCO Myca Micatex Magco Mica

Milmica Used to regain lost circulation

Combination of Kwikseal Kwikseal Kwik-Seal Kwik-Seal Kwik-Seal Used to regain lost granules, flakes, and fibrous materials of various sizes in one sack

circulation

Filming Amine DOW FilmKote

A Catalyzed Sodium Bisulfite DOW Oxban S10 Oxygen Scavenger

SPECIALTY PRODUCTS

Bentonite Extender Benex IMCO Gele< Benex Benex Benex

Increases yield of bentonite to form very low-solids drilling fluid

OIL-MUD ADDITIVES Primary Emulsifier DOW EMA

and DOW EMB

IMCO Kenol-S<L) and IMCO <en-X Cone. ML)

Invermul Vcrtoil Carbo Tec{D) and Ce'bo Tec<U

Primary additives to form stabls water-in-oil emulsion

Viscosifier Gelling Agent DOW PreGel IMCO Ken Gel-Tone VG-69 Carbo Provides viscosity

Gel and and Gel weight suspension and IMCO Ken-X Petro filtration control Cone .2 Tone

Stabilizes Stabilizes running shale, Borehole improves emulsion. Conditions DOW IMCO VR weight suspension, and

Premulx fluid loss under high temperature conditions

This mud Is a non -o i l base mud and w i l l be t rea ted p r i o r to d isposal i n t o the U U I T .

T T

SITE Of \LCCK ?a

or mexico

V I C I N I T Y M A P

150 Mi

LOf 2 8 ° 4f t ' 49 281" L3ng 8 9 ° 57" 04 412' Y i 37,954 39'

Lat. 2 8 ° *£ ' 47.489' Lonq 9 9 ° 54' 18 636'

BLK. 77 Lot 2 8 ° 44" 38.239" Lon* 89° 57" 08.41 l "

I 4 , 758 .04 '

Tenneco Oil Company OCS -G - 5656

BLK. 78 Y : 30,575 97 '

Lot 28° 44 '39.351" Long 89° 55' 42.S40"

Lot . 28° 43'22.310" Long. 8 9 ° 55' 43.556' 7379 .02 '

Y i 23,198 95'

P'_ K. 8 I cot 28° 43' 21.408 Long 89° 54' 20.701'

MASTER SHEET

SCALE

PROPOSED MINERAL DEVELOPMENT

GRAND ISLE AREA GULF OF MEXICO

APPLICATION BY SEPT 13, 1983

TENNECO OIL COMPANY LAFAYETTE, LA.

TENMCOJ TENNECO OIL EXPLORATION & PRODUCTION (COMPANY)

INTEROFFICE COMMUNICATION

TO:

FOR:

FROM:

RE:

EASTERN GULF DIVISION

D. G. WOWILLIAMS ' 1

G. K. MALONEY

FINAL SHALLOW HAZARD SURVEY FOR GRAND ISLE 78 & 79 AND SITE CLEARANCE FOR GRAND ISLE 78 LOCATION A

DATE: SEPT. 22, 1983

INTRODUCTION

This report is a summary of the f ina l Shallow Hazard Survey for Grand Is le Blocks 78 and 79, and is the f ina l s i te clearance for Location A on Grand Isle 78. Preliminary s i t e speci f ic clearance for Location A was contained in the previously submitted le t ter of H. B. Russell from August 31, 1983. A detai led descript ion of the hazard survey is contained in the report of Intersea Research Corporation prepared by Wayne J . Cox (September 19, 1983).

SURFACE LOCATION

Location A: 7300' FNL and 4000' FEL of Grand Isle Block 78.

GEOPHYSICAL DATA

Grand Is le 78 and 79 were surveyed by Intersea Research Corporation fo r Tenneco 011 Company. Data acquired and analyzed fo r bottom and sub-bottom d r i l l i n g hazards were from fathometer, magnetometer, sidescan sonar, sub-bottom p r o f i l e r , sparker and water gun.

GENERAL ANALYSIS

Analysis of th is data Indicates the fol lowing condit ions:

1) Water depths range from approximately 160 feet to 190 feet on GI 78, and 176 feet to 262 feet on GI 79.

2) Seafloor slopes gently (0.1° to 0.5°) to the southeast.

3) S i l t y clay on bottom to a depth of approximately 60 feet .

4) Acoust ical ly tu rb id zones as l i k e l y indicators of near surface gas concentrations.

5) Presence of underconsolidated sediments.

6) No i den t i f i ca t i on of f au l t i ng .

7) One (1) sidescan - - magnetometer anomaly.

8) Three (3) o i l and/or gas pipelines

TENNECO OIL EXPLORATION & PRODUCTION , ' 1 j C O M M N V )

INTEROFFICE-COMMUNICATION

0. G. MCWILLIAMS SEPTEMBER 22, 1983 PAGE 2

GENERAL RECOMMENDATIONS

Drilling operations conducted on Grand Isle 78 and 79 should:

1) Avoid the three (3) oil and/or gas pipelines.

2) Avoid the one (1) identified sidescan-magnetometer anomaly.

3) Avoid, i f possible, acoustically turbid zones that may represent near surface gas concentrations. When locations in these zones are not avoidable, precautionary measures should be undertaken.

4) Take precautionary measures to ensure stability of drilling rlqs since near surface gas concentrations and possible underconsolidated sediments represent a potential hazard with respect to load bearing capacity.

LOCATION A ANALYSIS

Review of the data Indicates that Location A 1s (see attached map):

1) In water depth of approximately 177 feet.

2) Approximately 850' north of nearest pipeline.

3) Approximately 2400' north of sldescar-magnetometer anomaly.

4) Approximately 150' north of nearest acoustically turbid zone.

LOCATION A RECOMMENDATIONS

Drilling operations at Location A should take precautionary measures to prepare for the possibility of near surface gas concentrations and possible occurrence of underconsolidated sediments. A core at Location A is recommended and would indicate specifically the presence, absence and severity of these conditions at the drill site.

LOCATION A CONCLUSIONS

The Grand Isle 78 A location may be safely occupied i f precautions are undertaken for the surface and near-surface conditions described above.

GKM:kmd

cc: Shallow Hazard Dis t r ibut ion

•mi­

cr

I i -l-M