SUPPLEMENTAL EXPLORATION PLAN 

S-7636 

ANADARKO PETROLEUM CORPORATION 

GREEN CANYON BLOCKS 859 & 903 

OCS-G 24194 & 24197 

PUBLIC COPY 

RECORD OF CHANGE LOG 

Submission 

Type 

Date Sent to 

BOEMRE 

Summary of 

Submission 

Page 

Numbers 

Initial 10/07/2013 Initial plan submittal All 

Amendment 10/28/2013 Correct typo on plan info 

form and plat 

16, & 24 

Change of Record 

Log 

11/15/2013 Change of Record Log 1 

Final Copy of Plan 11/15/2013 Complete Final EP 

Submittal 

All 
 

PUBLIC 

SUPPLEMENTAL EXPLORATION PLAN 

GREEN CANYON BLOCKS 859 & 903 

OCS-G 24194 & 24197 

Unit No. 754311007 

OFFSHORE, LOUISIANA

 

Anadarko Petroleum Corporation 

1201 Lake Robbins Drive 

The Woodlands, Texas 77380 

Contact: Jill Fowler 

jill.fowler@anadarko.com 

(832) 636-1554 

1 – Hard Copy Confidential 

1 – CD Confidential 

1 – Hard Copy Public Information 

1 – CDs Public Information

October, 2013 
 

SUPPLEMENTAL EXPLORATION PLAN 

LEASES OCS-G 24194 & 24197 

GREEN CANYON BLOCKS 859 & 903 

 A. Plan Contents 

 B. General Information 

 C. Geological, Geophysical 

D. Hydrogen Sulfide Information 

 E. Biological, Physical and Socioeconomic Information 

F. Wastes and Discharge Information 

 G. Air Emissions Information 

 H. Oil Spill Information 

I. Environmental Monitoring Information 

 J. Lease Stipulations 

 K. Support Vessels and Aircraft Information 

 L. Onshore Support Facilities Information 

M. Coastal Zone Management Act Information 

N. Environmental Impact Analysis 

O. Administrative Information 
 

A 

PLAN CONTENTS

(a) Plan Information Form 

Under this Supplemental Exploration Plan, Anadarko Petroleum Corporation (Anadarko) proposes to drill and 

complete ten wells total in Green Canyon Blocks 859 & 903: GC903 "D" & “DD”, and GC 859 "F, G, H, FF, GG, 

HH, I, II". The waste discharges and air emissions associated with drilling to TD and conducting completion 

operations for these ten wells are included in this plan. 

 

Anadarko will also conduct top-hole drilling on two additional wells with surface locations in Green Canyon Block 

903 (EP locations GC 859 “J” and GC 903 “E”). Only waste discharges and air emissions associated with the tophole drilling of GC 859 J" and GC 903 "E" have been included in this plan. Drilling the top-hole sections for both 

wells will take approximately 20 days total. 

Waste discharges and air emissions associated with drilling the two wells, GC 859 “J” and GC 903 “E”, to the final 

total depth (TD), as well as completion operations will be addressed under a future exploration plan. The remaining 

drilling operations to TD and completion operations will be conducted with a different rig, which will be discussed 

in the subsequent EP submittal. 

The wells will be drilled using either a Dynamically Positioned (DP) Drillship or DP Semisubmersible drilling rig. 

Drilling and completion operations for the proposed well locations will utilize a Subsea BOP stack. OCS Plan 

Information Form MMS-137 is enclosed as Attachment A-1. 

(b) Location 

Enclosed as Attachment A-2 is a well location plat at a scale of 1 inch = 2000 feet that depicts the surface location 

and water depth of the proposed well. 

(c) Safety and Pollution Prevention Features 

Safety features on the drilling unit will include well control, pollution prevention, safe welding procedures, and 

blowout prevention equipment as described in Title 30 CFR Part 250, Subparts C, D, E, G and O; and as further 

clarified by BOEM Notices to Lessees, and applicable regulations of the Environmental Protection Agency and the 

U.S. Coast Guard. The appropriate life rafts, life jackets, ring buoys, etc., as prescribed by the U.S. Coast Guard, 

will be maintained on the facility at all times. 

(d) Storage Tanks and Production Vessels 

The Green Canyon Blocks 859 & 903 wells will be drilled with a DP drillship DP semisubmersible unit. 

Type of Facility Type Of Storage 

Tank 

Tank 

Capacity 

Number 

Of Tanks 

Total 

Capacity 

Fluid 

Gravity 

(Api) 

Total Capacity 

of all Tanks 

for Rig Type 

Drillship Fuel Oil Storage 

Tank 

16,564 bbls 1 16,564 bbls No. 2 Diesel 6 tanks total= 

36,595.9 bbls 

Fuel Oil Storage 

Tank 

16,685.5 

bbls 

1 16,685.5 bbls No. 2 Diesel 

Fuel Oil Settling 

Tanks 

836.6 bbls 2 1,673.2 bbls No. 2 Diesel 

Fuel Oil Day Tanks 836.6 bbls 2 1,673.2 bbls No. 2 Diesel 
 

DP Semi Fuel Oil Hull 

Tanks 

4,541 bbls 2 9,082 bbls No. 2 Diesel 7 tanks total= 

16,689 bbls 

Fuel Oil Hull 

Tanks 

3,392 bbls 2 6,784 bbls No. 2 Diesel 

Fuel Oil Deck Day 

Tank 

629 bbls 1 629 bbls No. 2 Diesel 

Fuel Oil Deck 

Settling Tank 

164 bbls 1 164 bbls No. 2 Diesel 

 Fuel Oil 

Emergency 

Generator 

30 bbls 1 30 bbls No. 2 Diesel 

(e) Pollution Prevention Measures 

The drilling rig utilized for these operations will comply with all applicable regulations regarding 

pollution prevention and control. The rig has a Shipboard Oil Pollution Emergency Plan 

(SOPEP), which is reviewed and approved annually by the American Bureau of Shipping (ABS). 

The SOPEP is provided to assist employees in dealing with an unexpected discharge of oil. Its 

primary purpose is to set in motion the necessary actions to stop or minimize the discharge of oil 

and to mitigate its effects. Effective planning ensures that the necessary actions are taken in a 

structured, logicalm and timely manner. 

Pollution prevention measures include installation of curbs, gutters, drip pans, and drains on deck 

areas to collect all contaminants and debris. Most deck drains and some of the joints at the edge 

of the rig floor go overboard or into the moonpool, respectively. To prevent ocean discharge 

from the drains there is a dedicated drip pan under the rotary table. The pipe racks, mud pump 

room, sack store, and drill floor drains go to a holding tank, which is served by a dedicated oily 

water separator. The well test area, engine room, and other major machinery spaces drains all go 

to slops tanks, which are served by a large general-service, oily water separator. The containment 

devices are temporary. They are not meant for permanent storage of waste. On the rare occasion 

that they contain wastes, they are pumped, mopped, or cleaned within a short period of time. The 

chances of damage to a containment structure during such time as it contains wastes are 

exceedingly small. 

(f) Additional Pollution Prevention Measures 

No additional measures are proposed under this plan. The activities proposed in this plan are not 

located offshore Florida. 

(g) Description of Previously Approved Lease Activities 

Anadarko has previously approved well locations in Green Canyon Blocks 859 & 903. Approval 

was granted to drill and complete the following well locations in Green Canyon Bloc 859 under 

the Initial Exploration (Plan Control No. N-9167) approved April 23, 2008: 
 

Well 

Location 

Status of Well Location Potential Future Operations 

GC 859 “A” Location was used to drill well #SS001 N/A; well TA’d 

GC 859 “B” Approved well location for future utility. Future drill location.

GC 859 “C” Approved well location for future utility. Future drill location.

Approval was granted to drill and complete the following well locations under the Initial 

Exploration (Plan Control No. N-9375) approved June 17, 2009: 

Well 

Location 

Status of Well Location Potential Future Operations 

GC 903 “A” Location was used to drill well #SS001 N/A; well P&A 

GC 903 “C” Location was used to drill well #SS002 N/A; well P&A 

GC 859 “E” Approved well location for future utility. Future drill location.

Approval was granted to drill and complete the following well location in Green Canyon Block 

903 under the Supplemental Exploration (Plan Control No. S-7508) approved September 16, 

2011: 

Well 

Location 

Status of Well Location Potential Future Operations 

GC 903 “B” Location was used to drill well #SS003 N/A; well TA’d 
U.S. Department of the Interior OMB Control Number: 1010-0151

Bureau of Ocean Energy Management OMB Approval Expires: 12/31/14

OCS PLAN INFORMATION FORM 

General Information 

7\SHRI2&63ODQ  ([SORUDWLRQ3ODQ(3 'HYHORSPHQW2SHUDWLRQV&RRUGLQDWLRQ'RFXPHQW'2&'

&RPSDQ\1DPH %2(02SHUDWRU1XPEHU

$GGUHVV &RQWDFW3HUVRQ

3KRQH1XPEHU

(0DLO$GGUHVV

,IDVHUYLFHIHHLVUHTXLUHGXQGHU&)5DSURYLGHWKH $PRXQWSDLG $44,076.00 5HFHLSW1R 74511169464

Project and Worst Case Discharge (WCD) Information

/HDVHV $UHD %ORFNV 3URMHFW1DPH,I$SSOLFDEOH

2EMHFWLYHV  2LO  *DV  6XOSKXU  6DOW 2QVKRUH6XSSRUW%DVHV

3ODWIRUP:HOO1DPH 7RWDO9ROXPHRI:&' $3,*UDYLW\

'LVWDQFHWR&ORVHVW/DQG0LOHV 9ROXPHIURPXQFRQWUROOHGEORZRXW

+DYH\RXSUHYLRXVO\SURYLGHGLQIRUPDWLRQWRYHULI\WKHFDOFXODWLRQVDQGDVVXPSWLRQVIRU\RXU:&'"  <HV  1R

,IVRSURYLGHWKH&RQWURO1XPEHURIWKH(3RU'2&'ZLWKZKLFKWKLVLQIRUPDWLRQZDVSURYLGHG 

'R\RXSURSRVHWRXVHQHZRUXQXVXDOWHFKQRORJ\WRFRQGXFW\RXUDFWLYLWLHV"  <HV  1R

'R\RXSURSRVHWRXVHDYHVVHOZLWKDQFKRUVWRLQVWDOORUPRGLI\DVWUXFWXUH"  <HV  1R

'R\RXSURSRVHDQ\IDFLOLW\WKDWZLOOVHUYHDVDKRVWIDFLOLW\IRUGHHSZDWHUVXEVHDGHYHORSPHQW"  <HV  1R

Description of Proposed Activities and Tentative Schedule (Mark all that apply) 

Proposed Activity Start Date End Date No. of Days 

3OHDVHVHHWKHDWWDFKHGSURSRVHGDFWLYLW\VFKHGXOH

 

 

 

 

 

 

 

Description of Drilling Rig Description of Structure 

 -DFNXS  'ULOOVKLS  &DLVVRQ  7HQVLRQOHJSODWIRUP

 *RULOOD-DFNXS  3ODWIRUPULJ  )L[HGSODWIRUP  &RPSOLDQWWRZHU

 6HPLVXEPHUVLEOH  6XEPHUVLEOH  6SDU  *X\HGWRZHU

 '36HPLVXEPHUVLEOH  2WKHU$WWDFK'HVFULSWLRQ

'ULOOLQJ5LJ1DPH,I.QRZQ

 )ORDWLQJSURGXFWLRQ

V\VWHP

 2WKHU$WWDFK'HVFULSWLRQ

Description of Lease Term Pipelines 

From (Facility/Area/Block) To (Facility/Area/Block) Diameter (Inches) Length (Feet) 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 1 of 4

Blocks 859 & 903

x

Anadarko Petroleum Corporation 00981

Jill Fowler

1201 Lake Robbins Drive 832-636-1554

The Woodlands, TX 77380 jill.fowler@anadarko.com

OCS-G 24194 & 24197 GC Heidelberg

x x Fourchon, LA

GC 859 "J" 31,902,860 bbl 31.4

135 miles 263,660 BOPD

x

x

x

x

x

x
Proposed Activity Start Date End Date No. of Days

Top Set GC 859 "J" 1/15/2014 1/25/2014 10

Drill GC 903 “D” 1/25/2014 5/25/2014 120

Top Set GC 903 "E" 5/25/2014 6/4/2014 10

Drill GC 859 “F” 6/4/2014 10/22/2014 140

Complete GC 859 “F” 10/22/2014 2/4/2015 105

Drill GC 859 “G” 2/4/2015 6/24/2015 140

Complete GC 859 “G” 6/24/2015 10/7/2015 105

Drill GC 859 “H” 10/7/2015 2/24/2016 140

Complete GC 859 “H” 2/24/2016 6/8/2016 105

Drill GC 859 “FF” 6/8/2016 10/26/2016 140

Complete GC 859 “FF” 10/26/2016 2/8/2017 105

Drill GC 859 “GG” 2/8/2017 6/28/2017 140

Complete GC 859 “GG” 6/28/2017 10/11/2017 105

Drill GC 859 “HH” 10/11/2017 2/28/2018 140

Complete GC 859 “HH” 2/28/2018 6/13/2018 105

Drill GC 859 “I” 6/13/2018 10/21/2018 130

Complete GC 859 “I” 10/21/2018 1/21/2019 92

Drill GC 859 “II” 1/21/2019 5/31/2019 130

Complete GC 859 “II” 5/31/2019 8/31/2019 92

Drill GC 903 “DD” 8/31/2019 12/29/2019 120

Complete GC 903 “DD” 12/29/2019 3/30/2020 92

Total No. of Days 2266

Start Date:   1/15/2014

End Date:   3/30/2020

Heidelberg Exploration Plan Proposed Activity Schedule
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

:HOORU6WUXFWXUH1DPH1XPEHU,IUHQDPLQJZHOORU

VWUXFWXUHUHIHUHQFHSUHYLRXVQDPH

3UHYLRXVO\UHYLHZHGXQGHUDQDSSURYHG(3RU

'2&'"

 <HV  1R

,VWKLVDQH[LVWLQJZHOO

RUVWUXFWXUH"

<HV 1R ,IWKLVLVDQH[LVWLQJZHOORUVWUXFWXUHOLVWWKH

&RPSOH[,'RU$3,1R

'R\RXSODQWRXVHDVXEVHD%23RUDVXUIDFH%23RQDIORDWLQJIDFLOLW\WRFRQGXFW\RXUSURSRVHGDFWLYLWLHV"  <HV  1R

WCD info )RUZHOOVYROXPHRIXQFRQWUROOHG

EORZRXW%EOVGD\

)RUVWUXFWXUHVYROXPHRIDOOVWRUDJHDQG

SLSHOLQHV%EOV

$3,*UDYLW\RI

IOXLG

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. 2&6 2&6 2&6

2&6

Area Name  

Block No. 

Blockline

Departures 

(in feet)

16'HSDUWXUH)BBBB/ 16'HSDUWXUH)BBBB/ 16'HSDUWXUH)BBBB/

16'HSDUWXUH)BBBB/

16'HSDUWXUH)BBBB/

(:'HSDUWXUH)BBBB/ (:'HSDUWXUH)BBBB/ (:'HSDUWXUH)BBBB/

(:'HSDUWXUH)BBBB/

(:'HSDUWXUH)BBBB/

Lambert XY

coordinates 

; ; ;

;

;

< < <

<

<

Latitude/

Longitude

/DWLWXGH /DWLWXGH /DWLWXGH

/DWLWXGH

/DWLWXGH

/RQJLWXGH /RQJLWXGH /RQJLWXGH

/RQJLWXGH

/RQJLWXGH

:DWHU'HSWK)HHW 0')HHW 79')HHW

$QFKRU5DGLXVLIDSSOLFDEOHLQIHHW

0')HHW

0')HHW

0')HHW

79')HHW

79')HHW

79')HHW

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

;  < 

;  < 

;  < 

;  < 

;  < 

;  < 

;  < 

;  < 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "F" x

x

x

G-24194

Green Canyon

859

8860'FSL

4961'FEL

2,355,198.90

9,845,500.39

27.115041

90.8022228

5345'

N/A

n/a
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "FF" x

x n/a

x

G 24194

Green Canyon

859

8841'FSL

5001'FEL

2,355,158.89

9,845,481.12

27.1149899

-90.8023467

5345'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "G" x

x n/a

x

G 24194

Green Canyon

859

9027'FSL

5005'FEL

2,355,154.72

9,845,667.31

27.1155022

-90.8023495

5345'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "GG" x

x n/a

x

G 24194

Green Canyon

859

9022'FSL

5050'FEL

2,355,109.72

9,845,662.31

27.1154906

-90.8024881

5345'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "H" x

x n/a

x

G 24194

Green Canyon

859

9003'FSL

5089'FEL

2,355,071.31

9,845,642.58

27.1154382

-90.8026072

5345'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "HH" x

x n/a

x

G 24194

Green Canyon

859

8952'FSL

5113'FEL

2,355,046.67

9,845,592.22

27.1153009

-90.8026856

5345'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "I" x

x n/a

x

G 24194

Green Canyon

859

8843'FSL

5054'FEL

2,355,105.56

9,845,483.25

27.1149984

-90.8025105

5345'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 'HFHPEHU- 6XSHUVHGHVDOOSUHYLRXVHGLWLRQVRIWKLVIRUPZKLFKPD\QRWEHXVHG3DJHRI

*&  ,, [

[ QD

[

* 

*UHHQ &DQ\RQ




)6/


)(/












1$
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 859 "J" x

x n/a

x

G 24197

Green Canyon

903

2136'FNL

2276'FEL

2,357,884.26

9,834,503.99

27.0846721

-90.7945638

5260'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 903 "D" x

x n/a

x

G 24197

Green Canyon

903

2154'FNL

2193'FEL

2,357,967.20

9,834,485.60

27.0846175

-90.7943099

5260'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 903 "DD" x

x n/a

x

G 24197

Green Canyon

903

2132'FNL

2232'FEL

2,357,928.33

9,834,507.77

27.0846804

-90.7944281

5260'

N/A
OCS PLAN INFORMATION FORM (CONTINUED)

Include one copy of this page for each proposed well/structure 

Proposed Well/Structure Location

Well or Structure Name/Number (If renaming well or 

structure, reference previous name): 

Previously reviewed under an approved EP or 

DOCD? 

Yes No 

Is this an existing well 

or structure? 

Yes No If this is an existing well or structure, list the 

Complex ID or API No. 

Do you plan to use a subsea BOP or a surface BOP on a floating facility to conduct your proposed activities? Yes No 

WCD info For wells, volume of uncontrolled 

blowout (Bbls/day): 

For structures, volume of all storage and 

pipelines (Bbls):

API Gravity of 

fluid

Surface Location Bottom-Hole Location (For Wells) Completion (For multiple completions, 

enter separate lines) 

Lease No. OCS OCS OCS

OCS

Area Name 

Block No. 

Blockline

Departures 

(in feet)

N/S Departure: F____ L N/S Departure: F____ L N/S Departure: F____ L

N/S Departure: F____ L 

N/S Departure: F____ L 

E/W Departure: F____ L E/W Departure: F____ L E/W Departure: F____ L 

E/W Departure: F____ L 

E/W Departure: F____ L 

Lambert XY

coordinates 

X: X: X: 

X:

X:

Y: Y: Y:

Y:

Y:

Latitude/

Longitude

Latitude Latitude Latitude 

Latitude

Latitude

Longitude Longitude Longitude 

Longitude

Longitude

Water Depth (Feet): MD (Feet): TVD (Feet): 

Anchor Radius (if applicable) in feet: 

MD (Feet): 

MD (Feet): 

MD (Feet): 

TVD (Feet): 

TVD (Feet): 

TVD (Feet): 

Anchor Locations for Drilling Rig or Construction Barge (If anchor radius supplied above, not necessary) 

Anchor Name 

 or No. 

Area Block X Coordinate Y Coordinate Length of Anchor Chain on Seafloor 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

X = Y = 

Form BOEM- 0137 (December 2011- Supersedes all previous editions of this form which may not be used.) Page 2 of 4

GC 903 "E" x

x n/a

x

G 24197

Green Canyon

903

2264'FNL

2329'FEL

2,357,831.17

9,834,376.41

27.084324

-90.794734

5260'

N/A







 

B 

GENERAL INFORMATION 

(a) Applications and Permits 

Prior to beginning exploration operations the following application(s) will be submitted for approval: 

Application/Permit Issuing Agency Status 

Permits to Drill BSEE Bureau of Safety and Environmental 

Enforcement (BSEE) 

To be submitted 

(b) Drilling Fluids 

Type of Drilling Fluid Estimated Volume Per Well 

Water-based (NaCl saturated, seawater, 

freshwater, barite) for Pump and Dump 

21,000 bbls per well** 

Synthetic-based (internal olefin, ester) 13,000 bbls per well 

Oil-based NA 

**The actual volume ordered out will be an estimated 21,000 bbls/well of mud. Once on location this volume will 

be cut back and mixed with seawater to different desired mud weights which will increase the volume that is 

discharged at the seafloor. The estimated volume that will be discharged at the seafloor will be approximately 

74,000 bbls/well (NOTE: there will be twelve wells for a total of 888,000 bbls). 

(c) New or Unusual Technology 

Anadarko does not propose to use any new or unusual technology to drill the well proposed in this plan. 

(d) Bonding Statement 

The bond requirements for the activities and facilities proposed in this EP are satisfied by an area-wide 

bond furnished and maintained according to 30 CFR part 256, subpart I; NTL No. 2000-G16, “Guidelines 

for General Lease Surety Bonds,” and National NTL No. 2008-N07, “Supplemental Bond Procedures”. 

(e) Oil Spill Financial Responsibility (OSFR) 

Anadarko Petroleum Corporation (Company Number 00981) has demonstrated oil spill financial 

responsibility for the facilities proposed in this EP according to 30 CFR Part 253, and NTL No. 2008-

N05, “Guidelines for Oil Spill Financial Responsibility for Covered Facilities”. 

(f) Deepwater Well Control Statement 

Anadarko Petroleum Corporation (Company Number 00981) has the financial capability to drill a relief 

well and conduct other emergency well control operations if required. 

(g) Blowout Scenario

Anadarko prepared this blowout scenario pursuant to guidance provided in NTL No. 2010-N06. The 

Green Canyon 859 #3 well (EP Location “J”) is addressed in this blowout scenario since it is the location 

with the highest potential worst case discharge (WCD) rate for Green Canyon Blocks 859 & 903. A 

similar approach would be taken in the event of a blowout for the other wells located in Green Canyon 
 

Blocks 859 & 903. Based on NTL No. 2010-N06 guidance, the maximum hydrocarbon discharge for 

Green Canyon Blocks 859 & 903 is calculated to be 263,660 BOPD.

Purpose 

This information provides a generic blowout scenario, additional information regarding any potential oil 

spill, the measures Anadarko Petroleum will take to prevent a blowout, and if necessary, promptly 

respond to manage a blowout scenario if one occurs. The following information is pursuant with 30 CFR 

250.213(g), 250.219, 250.250 and NTL No. 2010-N06. 

Background 

This section has been developed to document the additional information requirements for Exploration 

Plans as requested by NTL No. 2010-N06. GC 859 #3 will be approximately 3,620 ft south of the existing 

BHL of GC 859 #1 and approximately 3,900 ft north-northwest of the existing BHL of GC 903 #3 

Information Requirements 

Blowout Scenario 

The GC 903 #5 well will be drilled to objective sands, as outlined in the Geological and Geophysical 

Information section of this Plan, utilizing a MODU rig with a marine riser and sub-sea BOP. A typical 

sub-sea wellhead system, conductor, and surface and intermediate casing program will be used. 

The Blowout Scenario assumes a hydrocarbon influx occurs from the objective intervals, followed by a 

well control event. The sub-sea BOP and marine riser fails, and a blowout occurs at the seabed. The WCD 

scenario assumes a 13-5/8” x 14” casing string set, 11-7/8” liner set, and 10-5/8” x 12-1/4” open hole 

drilled as per the attached wellbore schematic (Attachment H-7). The sand objectives are the WCD 

scenario. 

Estimated Flow Rate of the Potential Blowout 

Category EP 

Type of Activity Drilling 

Facility Location (area/block) GC Block 859 

Facility Designation MODU 

Distance to Nearest Shoreline (miles) 135 miles 

Uncontrolled Blowout (volume per day) 263,660 bbl 

Type of Fluid(s) Crude Oil 

a) Potential for the well to bridge over: 

Mechanical collapse of the reservoirs in the open-hole section of the wellbore was not considered. 

b) Measures to enhance the ability to conduct effective and early intervention in the event of a 

blowout: 

The likelihood of surface intervention to stop a blowout is high and is based on the following 

equipment specific to the MODU that has been contracted to do this drilling program: 

ROV Secondary BOP Control System: The BOP is confirmed to have a ROV Intervention Panel 

and circuits that have the following attributes: 
 

Hot stab is capable of closing one set of: 

Blind-Shear Rams (one set) 

Pipe Rams (one set) 

Unlatch the Lower Marine Riser Package 

ROV hot stab to be function tested in conjunction with the Stump test and tested at the same 

rate and pressure as the pump installed on the ROV used by the rig. 

BOP panels also can be operated by an ROV from an independent supply boat in the event of 

a loss-of-rig scenario. 

Deadman/Autoshear Function: The rig is equipped with an automated sequence that closes the 

blind shear rams in the event of any of the following scenarios: 

Inadvertent disconnect of the LMRP 

Loss of both hydraulic pressure and electrical supply from the surface BOP control system 

No human interface is required once these systems are armed. 

c) Availability of a rig to drill a relief well: 

Per the preliminary Mutual Aid agreements that have been worked between E&P Operators in the 

Gulf of Mexico, Anadarko will select from the best rig option available in the Gulf of Mexico fleet if 

and when it is required for relief well work. As of August 1, 2013, there were over 12 additional rigs 

capable of operating under these conditions in the Gulf of Mexico. A rig that could be used to drill a 

relief well is the Transocean Discoverer Clear Leader, which is a drill ship capable of drilling in 

12,000 ft of water without any constraints. The rig is currently under contract to Chevron and is on 

location in KC 829. 

There are no nearby platforms from which to drill a relief well. 

It is not feasible to drill a relief well from land. 

d) Rig constraints: 

A rig capable of drilling in 6,000 ft of water with a 15k Stack is required for any relief well 

operations. The Transocean Discoverer Clear Leader drill ship meets these requirements. 

e) Time taken to mobilize a rig and drill a relief well: 

An estimated 7-21 days is required to suspend operations on a deepwater GOM well and begin 

drilling the relief well. This assumes 0-14 days to suspend current operations on an existing well and 

7 days to mobilize and be ready to spud the relief well. The estimated time to drill the relief well is 

100 days which includes 20 days for additional directional work, for a total estimated time of 107-121 

days from time of blowout to finishing the relief well. The drilling days were based on the proposed 

days to drill the GC 859 #3 well through the objective sand (interval of WCD) with additional time 

added for ranging. 

The time estimate provided for the plan well is inclusive of 'both' drilling 'and' completion operations. 

As a completion is not typically part of relief well operations no time has been included for 

completion operations in the relief well estimate. Therefore the estimated time for a relief well 

should be less than for the plan well. In addition, information and learning from the drilling of the 
 

original well may provide opportunities to optimize drilling performance for relief well operations 

and thus reduce the required drilling time. 

f) Assumptions and calculations used in approved or proposed Oil Spill Response Plan: 

 The Merlin reservoir simulator, Avalon nodal analysis, and Prosper nodal analysis programs 

were used to estimate the WCD for this well. Supporting input data can be found on Data 

Sheets 1 through 3 (Attachments H-1 through H-3), and Merlin and Avalon-formatted 

Prosper nodal files are included as Electronic Attachments 1 and 2. At the seafloor, the 

estimated worst case discharge for the well is 263,660 BOPD based on flow from the 

objective sands. 

 The maximum total volume during a blowout could potentially be 31,902,860 bbl 

assuming 121 days for the maximum duration of a blowout, multiplied by the worst case 

daily uncontrolled blowout volume of 263,660 bbl. 

g) Measures taken to reduce the likelihood of a blowout:

 Well Design: Anadarko utilizes a systematic well design process for the planning and 

construction of a well operation. This process taps into the vast depth of experience Anadarko 

possesses in the Deep Water drilling arena and involves a multi-team peer review of the well 

design, shallow hazards, and formation pressure hazards expected during drilling. This process 

minimizes the potential for an unplanned well control event that could lead to a blowout. This 

process will also include a Registered Professional Engineer review and approval of the final 

casing design and cementing program. 

A detailed pre-drill assessment of formation pressure provided by Anadarko’s Geological and 

Geophysical team, along with third-party consultants, allows for a mud program that provides an 

overbalanced mud weight for the safe drilling of the well. For an exploration well, this may also 

include taking formation pressures to confirm the actual formation pressure during the well 

construction process to minimize the risk of an unplanned well control event. The pore pressure 

environment is understood due to the nearby offset wells. 

The well construction process also requires a systematic review and management acceptance of 

the start-up preparation work for the rig and crews and the third-party technical audit work on the 

rig and the rig’s well control equipment. This measures the rig’s ability to handle an unplanned 

well control event and provide assurance that the rig can successfully mitigate a loss of well 

control event and prevent it from becoming a blowout scenario. 

 Barrier Philosophy: For all well designs, Anadarko requires and uses a redundant barrier 

philosophy, that being two independent tested barriers, including one mechanical barrier, across 

each flow path during well operations. 

For the final casing string (or liner if it is the final string), there shall be two mechanical barriers 

in addition to cement inside the wellbore. 

It is also standard practice to conduct pressure testing, in accordance with the law, to confirm 

integrity on all relevant barriers. 

In addition, all intermediate and production casings returned to the wellhead will be locked down. 
 

 BOP and Well Control Equipment: The rig will have an 18-3/4” 15k psi BOP with primary 

and secondary BOP control systems. The BOP will have been completely recertified compliant to 

OEM specifications by a qualified third-party. Prior to commencement of operations, independent 

third-party verification will be obtained that the sub-sea BOP is designed for the specific 

equipment on the rig and this specific well design. 250.416(f) 

 BOP and Well Control Equipment Testing: To ensure effectiveness of the BOP and well 

control equipment, a testing program will be conducted prior to running the BOP and then during 

the well operations. This testing program will provide compliance with current federal regulations 

for pressure and function testing and will also provide periodic assurance on the performance of 

both primary and secondary BOP control systems including actual interface operations with the 

ROV and the ROV panel. 

 Well Control Training and Drills: Anadarko requires that key nominated onshore and offshore 

positions, including rig contractor personnel, hold a WellCAP or equivalent well control training 

certificate, renewable every two years for the type of floating drilling operation being conducted. 

Anadarko also monitors compliance for its personnel with the federal regulations and Sub-Part O 

for well control training. 

A comprehensive program of well control drills will be conducted offshore to ensure readiness to 

identify and then manage a well control situation and thereby minimize the potential for a well 

control event to lead to a blowout scenario. 

h) Arrangements for drilling a relief well:

• Anadarko maintains a master agreement with Wild Well Control, Inc. for advice, management, 

engineering, well kick pre- and post-modeling, and resource support for an unplanned loss-of-well-control 

event. If any well control event occurs, Wild Well Control, Inc. would be contacted and mobilized if 

required to support Anadarko’s operational team, both in the onshore and offshore locations. 

•The conceptual relief well design is similar to the design of the GC 903 #5 well, in that, casing weights, 

grades, and setting points would be identical. A multiple block shallow hazard assessment has been 

completed (and submitted) for the area around GC Blocks 903 and 859. Site clearance letters for surface 

locations in both blocks have been completed and deemed acceptable for drilling. The potential areas for 

high density chemo-synthetic communities in the study area have been identified and can be avoided. 

Depending on the nature of the blowout scenario, well geometry, and total depth required to intersect the 

blowout, previously submitted surface locations and/or additional surface locations would be submitted 

and all reviewed for best suitability for the location of the relief well if needed. The conceptual 

well design is not anticipated to take over 2 days to finalize upon initialization. 

•Anadarko’s philosophy is to carry adequate inventory in stock to drill a complete well(s) from surface to 

TD. Back-up long-lead equipment equivalent to the original well design will be carried in stock to allow a 

rapid response. This includes a spare deepwater sub-sea wellhead system and the large OD casing (36”, 

28”, 22”, 18”, and 16”) and connectors required. Smaller OD casing (14”, 11 7/8”, and 9 7/8”) is 

considered widely available on the ground in the GOM and would be resourced out of existing inventory 

or from suppliers as required. 

•Existing service agreements will be in place for support services, including drilling fluids, casing 

running, cementing, ROVs, solids control, mud logging, directional drilling, LWD/MWD, logging, boats, 

and helicopters. 
 

•Specialist services for range finding to drill the relief well in close proximity to the original wellbore at 

the reservoir depth will be provided through Vector Magnetics LLC. Sperry Drilling/Halliburton and 

Schlumberger have in-house personnel to supplement Vector Magnetics LLC under our existing 

directional drilling agreements. 
 

C 

GEOLOGICAL AND GEOPHYSICAL INFORMATION 

(a) Geological Description 

Discussions regarding geologic information are considered proprietary and have been omitted from this 

public copy of the EP. Note, some attachments have been not included due to proprietary information. 

(b) Structure Contour Maps 

Current structure maps drawn to the top of each productive hydrocarbon sand showing the entire lease 

block, the surface locations of each well and locations of geological cross-sections, are enclosed as 

Attachment C-1.

(c) Interpreted 2-D and/or 3-D Seismic Lines 

Interpreted seismic lines are enclosed as Attachment C-2.

(d) Geological Structure Cross-Sections 

Interpreted geological structure cross-sections showing the location and depth of each proposed well are 

enclosed as Attachment C-3.

(e) Shallow Hazards Report 

A Shallow Hazards Report prepared by AOA Geophysics, Inc. was previously submitted with the Initial 

Exploration Plan for the both blocks. 

(f) Shallow Hazards Assessment 

Shallow Hazards Site Clearance Letters for the proposed well locations in Green Canyon Blocks 859 & 

903 are enclosed as Attachment C-4. Well locations GC 903-DD, GC 859-FF, GC 859-GG, GC 859-

HH, and GC 859-II (secondary locations) do not have specific Site Clearance Letters as they are ~50’ 

from the surface locations of GC 903-D, GC 859-F, GC 859-G, GC 859-H, GC 859-I (primary locations). 

Due to the close proximity to the primary wells, the secondary well locations should reference the 

appropriate primary Site Clearance Letter. Additionally, Site Clearance Letters for the two wells that will 

conduct top-hole drilling under this plan, GC 859 “J” and GC 903 “E, are also enclosed. 

(g) High-resolution Seismic Lines 

High resolution seismic lines are enclosed as Attachment C-5.

(h) Stratigraphic Column 

A generalized stratigraphic column depicting the wells from the seafloor to total depth is included as 

Attachment C-6. 
 

(i) Time Vs. Depth Tables 

The proposed activities under this EP are not considered to be in areas where there is no well control. 

Therefore, a seismic travel time versus depth table is not required per NTL No. 2008-G04, extended by 

NTL BOEM 2013-G02.