In Reply Refer To: RP-2-1 MAY I 6 1985
Sohio Petroleum Corpany A t t e n t i o n : Hr . Cary W. Ke r l i n Post O f f i ce Box 51468 Lafayet te . Louisiana 70505
Gentleaen:
Reference 1s aade to your Supplemental PUn of Explorat ion rece iver Kay 9. 1986. fo r Lease OCS-G 6899. Block 930. Viosca Knoll Area. This p lan Includes the a c t i v i t i e s proposed f o r Wells B and C.
In accordance w i t h 30 CFR 250.34, r ev i s . c Decenfcer 13. 1979. and our l e t t e r datec January 29. 1979. t h i s plan has keen detcrtolnetf to be conu\ete as of May 16. 1986. and 1s now being considered f o r approval .
Your plan con t ro l nunber i s S-1837 and should bo referenced In your COMMA 1 ca t ion and correspondence concem iny t h i s p l a n .
A. Donald G i r o i r Deputy Regional Supervisor Rule* and Production
bcc: Lease OCS-G 6899 (OPS-3-2) (FILE ROOM) COPS-3-4 w/Publ ic I n f o . Copy ot the plan (PUBL.REC.)
KJTolbert:gcw:5/12/86 Disk l a
SOHIOJ SOHIO PETROLEUM COMPANY PO BO»51«t8
OIL CSNTW 8TATX3'
April 30, 1986
Offshors Operations Support U.S. Dept. of the Interior Minerals Management Service P. 0. Box 7944
Hr. 0. W. Solanas, Regional Supervisor PUBLIC
INFORMATION
H e t a l r l e , LA 70f 3-7944
Re: Supplenental Plan of Exploration Viosca Knoll Block 990 OCS-G-6899. Wells B&C Offshore Louisiana
Oear Mr. Solanas:
Please find enclosed five (5) Confidential and six (6) Public Information copies of the Supplemental Plan of Exploration (POZ) for the above referenced project. Accompanying this POE are one (1) set of processed seismic line data offsetting each well location. Two (2) copies of the Hazard Study for Viosca Knoll Block 990 were previously submitted with the Initial POE for Viosca Knoll Block 989 on November 2, 1984.
If you have questions or require additional Information, please call Teresa St. Pierre at (318) 989-4200.
Sincerely,
Cary Vf. Kerlin Regulatory Supervisor Lafayette Oistrict
TLS/brg Attachments
cc: Mr. W. 0. Harris Nr. P. R. Judd
SUPPLEMENTAL PLAN OF EXPLORATION
0CS-u-b899
VIOSCA KNOLL BLOCK 990
OFFSHORE LOUISIAHA
April 30, 1986
LIST QF ATTACHMENTS
A. Letter from Sohlo Regional Geophysicist
B. Vicinity & Well Location Plats
C. Structure Map & Geologic Cross Section
0. Projected Air Emission Schedule
E. Mud Components
SUPPLEHENTAL PLAH OF EXPLORATIOH VIOSCA KNOLL BLOCK 990
OCS-G-6899 OFFSHORE LOUISIANA
Pursuant to the requirements of 30 CFR 250.23.1, Sohlo Petroleum Coinpany sub-
mits the following Supplemental Plan of Exploration (POE) for Viosca Knoll Block
990.
(1) EXPLORATIOH ACTIVITY
The proposed exploration activity for the subject tract consists of drilling
Wells "B & C, In addition to the ore (1) well covered In the Initial POE. The
°B & C" locations will be drilled as straight holes. The estimated time to
dril l these two (2) exploratory wells Is about one hundred fi f t y (150) days.
With a January 1, 1987 anticipated spudding date for the " f l " location.
(11) PROPOSED DRILLING RIG
Sohlo does not have a rig under contract for this project; however, these
wells will be drilled with a semi -submersible type drilling unit similar to the
PACESETTER I I I , which Is owned by Western Oceanic. This rig 1s capable of d r i l -
ling to 25,000' in water depths of 1,580*. Specifications and drawings of this
rig's diverter and BOP system have been sent to your office on November 2, 1984
with the initial POE for Viosca Knoll Block 989.
(111) GEOPHYSICAL WORK
All of the geophysical work preparatory 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 is planned unless data
obtained from drilling operations necessitates additional definition detail from
conventional reflection seismic methods.
Supplemental Plan of Exploration Viosca Knoll Block 990 Page 2
A shallow hazard report entitled "Hazard Study Blocks 989 to 990, Viosca
Knoll Area" was prepared by John Chance & Associates, Inc. and two (2) copies
were previously submitted with the Initial POE for Viosca Knoll Block 989.
The Viosca Knoll Block 990 Hazard Study has been reviewed by Mr. Jack Golden,
Sohio's Regional Geophysicist. Attachment A Is a letter from Mr. Golden in
which he agrees with John Chance's conclusions and addresses shallow hazards at
the "B & C" well sites in Viosca Knoll Block 990.
Attachment B-l Is a vicinity map depicting the subject tract's position rela-
tive to the Louisiana shoreline. Ho new onshore facilities will be required for
drilling the proposed exploratory well. Existing service company facilities 1n
the Venice Area have sufficient capacity to accommodate this project without
modification or expansion.
Attachment B-2 shows the proposed surface location for Wells "B C" which
will be drilled as straight holes. The total depth, water depth and surface
locations for each well Is as follows:
Mv) VICINITY AHD LOCATIOH MAPS
Well n 8" TD: Water Depth. Surface Location:
10,500' 1,310' 9.850' FNL 13,070' FEL
Well "C" TD: Water Depth: Surface Location:
10.500' 1.295' 10.840' FNL 14,690' FEL
-2-
Supplemental Plan of Exploration Viosca Knoll Block 990 Page 3
(v) STRUCTURE MAPS AND CROSS SECTIONS
Structure maps and cross-sections are Included 1n the five (5) confidential
copies of this Plan as Attachment C. Oepths shown on cross-sections and struc-
ture maps are sub-sea measure
OTHER RELEVANT DATA
(A) 011 Spill Contingency Plan
Sohlo Petroleum Company 1s a member of Clean Gulf Associates (CGA) and
would utilize that organization's equipment to clean up an oil s p i l l . The
closest CGA bases are at Venice, Grand Isle and Houma, Louisiana, respec-
tively. Response times for CGA Fst Response Units from these locations,
would be 8, 11 and 14 hours respectively. Manpower to operate the CGA's
equipment would be provided by Peterson Maritime, Services, Inc., whose
personnel are trained for o i l spill clean up operations. Sohlo's supervi-
sory personnel would direct the clean up operations until successfully com-
pleted. Additional details can be found in Sohlo's 1985 Oil Spill Contin-
gency Plan which has been approved by the Minerals Management Service.
(B) List of Mud Components
Attachment E 1s a l i s t of the proposed drilling mud components and addi-
tives. Including the common and chemical trade name of each additive.
Supplemental Plan of Exploration Viosca Knoll Block 990 Page 4
(C) Gaseous Emissions
Exploratory drilling operations w i l l be conducted from the surface
sites described 1n Section (1v) using the mobile dr i l l i n g unit des-
cribed in Section (11). Operations w i l l be of a maximum duration of
one hundred f i f t y (150) days.
At the d r i l l site, gaseous emissions will be generated by the rig en-
gines, the attendant work boat, stand-by boat, crew boat, and helicop-
ter, and the production testing of possible prospective reservoirs.
Gaseous emissions at the dock site in Venice, Louisiana, w i l l be gener-
ated by the work boot, crew boat and helicopter. Onshore staging for
this operation will be from existing f a c i l i t i e s , so there w i l l be no
significant increase 1n emission: for this activity. Projected emis-
sions from this activity have been calculated and are presented in
Attachment 0 entitled "Projected A1r Emission Schedule".
(D) Coastal Zone Management (CZM) Consistencv Certification
An Environmental Report and Consistency Certification was included in
the i n i t i a l POE. Proposed activities described In this Supplemental
POE w i l l also be conducted in a manner consistent with Louisiana's
approved CZM programs.
-4-
S O H I O P E T R O L E U M C O M P A N Y
TO: Ray Broussard Lafayette
DATE: January 9, 1986
FROM: Jack Golden
SUBJECT: Site Clearance - Viosca Knoll 990 (OCS-G-6899), Propoaed Location 9,850' FNL; 13,070' FEL; W.D. 1,310'
Gulf Coaat Division Geophysicists conclude that no significant shallow d r i l l i n g hazards exist within 500 feet of the Viosca Knoll Block 990 proposed
well location (9,850* FNL, 13,070' FEL; W.D. 1,310*).
The original records and summary report of a shallow hazard survey conducted by John E. Chance and Associates for Sohio Petroleum Company over Viosca Knoll Block 990 have been reviewed. We are in agreement with their findings and conclude that:
1) No obstructions aie observed on the sea floor within 500 feet of the propoaed location.
2) Selamic data indicate a thick sequence of parallel beds (over 1,000 feet) dip to the east. The rate of dip i s approximately 120 feet per mile.
3) No gas accumulations or faults are observed at the proposed well location within the upper 1,000 feet below mudline (2,310 feet below sea level) or within 500 feet of the proposed well location.
Attachments consist of annotated copies of the pinger, analog minisleeve exploder and side-scan sonar for lines 23 and 7 of the hazard survey.
cc: D. Balsinger J. Strasen D. Euddrus M. Neese (w/attachments) R. Hanna (w/attachments)
D. Harris R. Jantzen
971L/RH/mcw ATTACHMENT A
S O H I O P E T R O L E U M C O M P A N Y
TO: Ray Broussard Lafayette
DATE: January 9, 1986
FROM: Jack Golden
SUBJECT: Site Clearance - Viosca Knoll 990 (OCS-C-6899), Proposed "C" Location 10,840* FNL; 14,690' FEL; W.D. 1,295'
Gulf Coast Division Geophysicists conclude that no significant shallow d r i l l i n g hazards exist within 500 feet of the Viosca Knoll Block 990 proposed "C" well location (10,840' FNL, 14,690' FEL; W.D. 1,295').
The original records and summary report of a shallow hazard survey conducted by John E. Chance and Associates for Sohio Petroleum Company over Viosca Knoll Block 990 have been reviewed. We are in agreement with their tiadings and conclude that:
1) No obstructions are observed on the sea floor within 500 feet of the proposed location.
2) Seismic data indicate a thick sequence of parallel beds (over 1,000 feet) dip to the east. The rate of dip i s approximately 120 feet per mile.
3) No gas accumulations c" fauJts are observed at the proposed well location within the upper 1,000 feet below mudline (2,295 feet below sea level) or within 500 feet of the proposed well location.
Attachments consist of annotated copies of th- pinner, analog minisleeve exploder and side-scan sonar for lines 24 and 7 of the hazard survey.
Jack (Joluen
cc: D. Balslnger J. Strasen D. Buddrus M. Neese (w/attachments) R. Hanna (w/attachments)
D. Harris R. Jantzen
971L/RH/mcw
ATTACHMENT A
U.T.M. ZONE 16
BLK. 946
BLK. 989
Sohio Petroleum Compony O.C.S. - G - K899
BLK. 990
VIOSCA KNOLL AREA
BLK. 991
{NH 1 6 - 7
MISSISSIPPI CANYON AREA (NH 16 • 10) B L K . 2 8
VICINITY PLAT
SCALE
ATTACHMENT B-l
i PROPOSED MINERAL DEVELOPMENT
VIOSCA KNOLL AREA GULF OF MEXICO
APPLICATION BY SOHIO PETROLEUM COMPANY OCTOBER 9, 1984 LAFAYETTE, LOUISIANA
OCS-0 -61399
O B « c „ R T.D. -10,5CO
O RTO.-10,500'
LEGE N' D
O PROPOSED WELL LOCATIONS LOCATION "il". 9,8ft'tf FNL, I3,07d FEL LOCATION"C"' iU,340' FNL, 14,690'FEL
ATTACHMENT B-2 SCALS | « 2«000'
fit"**** iOMlO PETROLEUM COMPANY
OULF C04ST | OFFSHORE LOUISIANA
BLOCK 990 VI05CA KMOLL AREA
PROPOSED WELL LOCATIONS
" 8 " 0 "C"
«..»•• B IJQNN A hta»ia*l-M
AIR ' dAin 1 K'eVIEW FOR
tiOSCA XNOU AREA BLOCK 990 0CS-G-6S99
STANDARD OIL PROOUCTTON COMPAKV 3639 AMBASSADOR CAFFEKY PARKW.V LAFAYETTE, '.OU.*SIANA 70508
S»lf .tlTTED TO CARI KERLIN
RE'.HiLÂUK' SUPERVISOR
KAY I , 1986
PREPARED BY: JOHN E. CHANCE * ASSOCIATES, INC.
REGULATORY ANO ENVIRONMENTAL DIVISION LAFAYETTE, LOUISIANA PROJECT NO. W»-«083
John E. Chance 6 Assoc . , inc. -ATTACHMENT D
PROJECT'.'; .uP EMISSION SCHEDULE FOR EY01.ORATION PROJECT
I . Gr.,.eral Information
Location o" raci"! i ty - Viosca Knoll Area Block 990 Name of R'9/Platforn - Semi-submersible
Owner/Operator - Standard Oi 1 Production Company 3639 Ambassador "affery Parkway Lafayette, .ouisiana 70508
Contact Per;on - Cary Kerl in Regulatory Supervisor
P. j j e c t Start Date - January 1, 1987 Project End Oate - May 31, 1987
21,000 f*»et to be d r i l l ed 30 mi le: Offshore
I I . Total Emissions at Rig/Piatform. Dr i l l i ng (Year* 1 - 0)
Al1owabie Projected Emission Twitted Emissions Emissions Sta ti« s
p Substance (tons/yr) (tons/yr) (OK/N6)
1 CO 32826.64 14.38 OK
1 SO, c 999.00 .54 OK i ™* 999.00 91.99 OK VOC 999.00 4.91 OK •v. TSP 999.00 .05 OK
A. Transportation Emissions, Dr i l l i ng
Emitted Su osstance
C:ew Poat
(ton/yr)
Supply Boat
(tons/yr) Hel icopter
(tons/yr)
2
CO
SO
N0X
VOC
TS?
6.4«J
*
45.5i
2.45
•
5.E6
*
39.01
2.10
+
1.23
.04
.12
.11
.05
itehn E. Gh-iwe & Assort kv*
I I I . Transportation Servict* Pat©
Crew b.>at horsepower cf ?,500 Port V'jnfce, Louista".;-Waiting rime 4 hour(s) per t"*fjj 14 Tr*>(s) per Week
Supply boat horsepower cf 3,000 Port of Venice, Louisiana Waiting Time 10 hottr(s per t r i p 4 Trfp(s) per Week
Hel Icopters Po**t of Venice, Louisiana 1 Tr1p(s) per Wc-ik
IV. F'h^ngs of Air Quality Review
As per DOI-MMS regulations, this f a c i l i t y i s exempt from further a i r quality review LS i t has been determined that i t s operation w i l l not have a signif icant adverse environmental impact on a i r qual i fy .
V. Factors Used in Calcul ..MORS
A. Emission ^actors for Power Generation
Emitted Substance(s)
Dr i l l i ng (ib/hp-hr)
Production (ib/hp-hr')
CO .004200 .00084
so2 .001900 .00013 .028000 .0031
VOC .000550 .00031
TSP * .00011
Emission Factors for Transportation
Emitted Sub«stance(s)
Helicopters ("b/engine-LTO)
Boats Ob/gal)
CO 5.7000 .0598
x 2 .1800 *
™* .5700 .4196 VOC .5200 .0226
TSP .2500
. John E. €£- ftoe & Assoc., Inc.
".
DHT I fug Power Generation 60 hp-h ftt
Fuel Cor.sumption .0959 hp-hr / f t by Boats
if I . Methodology
Rfg/Piatfr.m - hurseoower-hour method Boats - horsepower-hour method Helicopte.s - lapding/takeoff (LTO) ryc le method
VH References
"Atmospheric rn-ss1ons from Offshore Oil Development ar.d ^ r o d i ^ o n " Dr i l l ing - EPA-450/3-77-026 (June 1977), pr. 81-92.
"C^npilat'on j f Ai r Pollutant Emission F e t o r s " . Boats, and helicopters - EPA Report AP-42 - (August 1977), 3rd Ec i t ion, pp. 116, 125, 1237.
* The EPA does not provide SO., and TSP emission factors for boats, nor
aces i t provide TSP emltslon factors for d^TMng.
- Job?; L Chance & Assoc., Inc. ^
SOHIO PETROLEUM COMPANY
DRILLING MUD COMPONENTS
Products of IMCO Services and Sun D r i l l i n g Products are l is ted in th is program for I l lus t ra t ion purposes. Equivalent or comparable products are available from other service companies such as NL Baroid, Magcobar, and Miichem.
Trade Name
IMCO GEL
IMCO SURLIFT
IMCO GELEX
IMCO LOYO
IMCO PLUG
IMCO MENTOR-28
IMCO RD-111
IMCO C-COR
IMCO X02
IMCO BAR
CAUSTIC SODA
IMCO LIG
SODA ASH
SUN LUBRA-GLIDE
SUN LUBRA-SEAL
Compos i t i on
Western Bentonite; A natural occuring element containing plates of S i l i ca a alumina ( Iner t )
Preshaped, wet processed, high density chrysot l le asbestos (a native calcium magnesium s i l i -cate)
Co-polymer of polyvinyl acetate & maleic anhydride
Pregelantlnized Starch
Crushed walnut hul ls
Mineral Oil
A proprietary blend containing modified l ignosulfonates, modified l i g n i t e and chromate
An organic f i lming amine
An Inorganic compound of the b i su l f i t e family
Mined bar i te (Ground barium sulfate)
Sodium hydroxide
L ign i te , ground a refined
Sodium carbonate
Stirene, divinalbenzene copolymer spheral beads
Mlcronlzed cal lulose f iber cotton seed hairs
Purpose
Primary wall bu i ld ing, f i l -trate control , a suspending agent for water based d r i l l i n g f l u i d
Viscosif ier fo r upperhole f lu ids
Bentonite extender
Fluid loss control
Lost c i rcu la t ion a b i t bal l ing
Lubricant/Fluid loss control
Thinner and f i l t r a t e control for water base d r i l l i n g f lu ids
Corrosion inh ib i to r and oxygen scavenger
Oxygen scavenger
Weighting agent
A lka l in i ty control
Thinner & water loss control
Removing hardness (calcium) from d r i l l i n g f l u i d
Reduces torque a drag
Improve wall cake
ATTACHMENT E