## UNITED STATES GOVERNMENT MEMORANDUM

To: Public Information (MS 5030)

Plans Section, Office of Field Operations (MS 5231)

Public Information copy of Exploration Plan

Control # - R-05139

Type - Revised Exploration Plan

Lease(s) - OCS-G27277 Block - 503 Mississippi Canyon Area OCS-G32334 Block - 547 Mississippi Canyon Area

Operator - LLOG Exploration Offshore, L.L.C.

Drilling, completion, and testing and installation of subsea
wellhead and/or manifold for Well No. 002 and 003

SEMISUBMERSIBLE

Attached is a copy of the subject plan for public comments on issues that

should be addressed in an Environmental Assessment.

It has been deemed submitted as of this date and is under review for approval.

James Webb

Plan Coordinator Description -

Rig Type - Subject: From: August 18, 2011

# LLOG EXPLORATION OFFSHORE, L.L.C

1001 Ochsner Boulevard, Suite 200 Covington, Louisiana 70433



# REVISED EXPLORATION PLAN (R-5139)

OCS-G-27277 & OCS-G-32334

MISSISSIPPI CANYON BLOCK 503/547



# PUBLIC INFORMATION

PREPARED BY:

Nelda Runyon Regulatory Specialist 985-801-4300 (Main) 985-801-4389 (Direct) neldar@llog.com

Final Copy: August 4, 2011

# Revised Exploration Plan (R-5139) OCS-G-27277, Block 503, Mississippi Canyon Area OCS-G-32334, Block 547, Mississippi Canyon Area Federal Waters, Gulf of Mexico, Offshore, Louisiana and Mississippi

Record of Changes

DATE SECTION/PAGE SYNOPSIS

03/23/11 Appendix A Work completed in previous plan Oil Spill Certification Letter

04/12/11 Appendix A –
Attachment C Bathymetry Seafloor Map

04/13/11 Appendix D Revised Waste & Discharge Tables

04/20/11 Appendix A –

Attachment A Revised Plan Information Sheet corrected MD/TVD

05/31/11 Appendix E Oil Spill Discussion & Worst Case Discharge Info

05/31/11 Appendix C Attachments D, E,

F & G Geological Information – Structure Maps, Cross Section, Structural Cross Section, Biostratigraphic/Litostratigraphic Column

05/31/11 Appendix A –
Attachment C Corrected Bathymetry Seafloor Map

05/31/11 Complete Copy with Public Info Copy with

Corrections

06/23/11 Appendix A Bathymetry Map

07/13/11 Appendix H and Appendix A Waste Tables/Benthic Community Statement

07/21/11 Amended Plan to include Location “C”

08/04/11 Complete Final Copy of Revised Plan

# OCS-G-27277, Block 503, Mississippi Canyon Area OCS-G-32334, Block 547, Mississippi Canyon Area Federal Waters, Gulf of Mexico, Offshore, Louisiana and Mississippi

APPENDIX A PLAN CONTENTS

Attachment A – OCS Plan Information Form

Attachment B – Well Location Plats Attachment C – Bathymetry /Anchoring Assessment and Benthic Community Statement

APPENDIX B GENERAL INFORMATION

Drilling Fluids

APPENDIX C GEOLOGICAL/GEOPHYSICAL INFORMATION

Attachment D – Structure Maps Attachment E – Cross Section Maps

Attachment F – Structural Cross Sections Attachment G – Biostratigraphic/Lithostratigraphic Column

APPENDIX D WASTE AND DISCH ARGE INFORMATION

Tables 1 and 2

APPENDIX E OIL SPILL INFORMATION

APPENDIX F SUPPORT VESSELS AND AIRCRAFT

Attachment H – Vicinity Map

APPENDIX G ONSHORE SUPPORT FACILITIES INFORMATION

APPENDIX H AIR EMISSIONS INFORMATION

APPENDIX I COASTAL ZONE MANAG EMENT ACT (CZMA)

INFORMATION

APPENDIX J NTL 2010-N06 DATA – Proprietary Data

# APPENDIX A

PLAN CONTENTS (30 CFR Part 250.211 and 250.241)

(A) Plan information : In accordance with 30 CFR 250.211 and 250.241(a),and NTL No. 2008-G04 and NTL 2010-N06, LLOG Ex ploration Offshore, LLC proposes to revise our currently approved Explor ation Plan (Control No. N-09274) for the drilling, completion and testing and in stallation of subsea wellhead and/or manifold. LLOG’s initial Exploration Pl an (N-09274) proposed three (3) well locations A, B, and C. Location “A” has been drilled and completed as MC 547

Well SS001.

Included as Attachment A is Form MMS 137 “OCS Plan Information Form”, which provides for the drilling, completi on, and testing of Well Location B and C (from a previously approved location in MC 503/547 – N-09274)..

( B) Location:

Attachment B – Well Location Plats

Attachment C – Bathymetry, Seafloor, and Near-Seafloor Features Map

(C) Safety & pollution features : Safety features on the semi-submersible will include well control, pollution preven tion, welding procedure, and blowout prevention equipment as described in Title 30 CFR Part 250, Subparts C, D, E, G & O; and as further clarified by No tices to Lessees, U.S. 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 Vessels

Type of Storage

Tank Type of Facility Tank Capacity (bbls) Number of

Tanks Total Capacity (bbls) Fluid Gravity (API)

Fuel Oil MODU 250 2 500 No. 2 (Diesel)



# (E) Additional safety, pollution prevetion, and early spill detection measures beyond those required by 30 CFR 250 : No additional measures are proposed.

# ATTACHMENT A

OCS PLAN INFORMATION FORM



# PUBLIC INFORMATION

# ATTACHMENT “A”

Plan Information Form

APPENDIX A - OCS PLAN INFORMATION FORM

General Information
Type of OCS X Amendment (EP) Development Operat ions Coordination Document (DOCD) Company Name: LLOG Exploration Offshore, LLC MMS Operator Number: 02058
Contact Person: Nelda Runyon

Phone Number: 985-801-4300 Address:

1001 Ochsner Blvd. Suite 200 Covington, LA 70433 E-Mail Address: neldar@llog.com

Lease:OCS-G-27277/32334 Area: MC Block: 503/547 Project Name (If Applicable): NA Objective( X Oil Gas Sulfur Salt Onshore Base:F ourchon,LA Distance to Closest Land 38
Description of Proposed Activi ties (Mark all that apply)

X Exploration drilling Development drilling

X Well completion Installati on of production platform

X Well test flaring 

# Installation of pr oduction facilities
Installation of well protec tion structure Installation of satellite structure

X Installation of subsea wellheads and/or manifold s Installation of leas e term (ROW) pipelines
Temporary well abandonment Commence production
Other (Specify and describe) Have you submitted or do you plan to submit a Conservation Information Document to X Yes No Do you propose to use new or unusual technol ogy to conduct your activities? Yes X No Do you propose any facility that will serve as a host facility for deepwater subsea Yes X No Do you propose any activities that may disturb an MMS-designated high-probability Yes X No Have all the surface locations of your proposed activities been previously reviewed and X Yes No

Tentative Schedule of Proposed Activities
Proposed Activity Start Date End Date No. of days Drill, complete, and test Well Locati on “B” (Well No. 2) 12/15/2011 04/06/2012 114
Drill, complete, and test Well Locati on “C” (Well No. 3) 04/06/2012 07/12/2012 111

Rig specifications will be made part of the Application for Permit to Drill

Description of Drilling Rig Description of Production Platform 

# Jackup Drillship Caisson Tension leg platform Gorilla Jackup Platform rig Well protector Compliant tower

X Semisubmersible Submersible Fixed platform Guyed tower

DP Semisubmersible Other (Attach Description) Subsea manifold Floating production
Drilling Rig Name (If Known): Unknown Spar Other (Attach

Description of Lease Term Pipelines
From (Facility/Area/Block) To (Facility/Area/Block) Diameter(In) Length Product



# PUBLIC INFORMATION

# Appendix A-Amended 07/21/11 OCS PLAN INFORMATION FORM (CONTINUED Include one copy of this page for each proposed well/structure

MMS Form MMS-137 Page 2 of 2 Proposed Well/Structure Location
Well or Structure Name/Number: MC 547 (Lo cation B) - Well No. 2 Subsea Completion

Anchor Radius (if applicab le) in feet 9,000’ X Yes No

SURFACE BOTTOM HOLE

Lease No. OCS-G-27277

Area Name MC

Block No. 503

N/S Departure 528’ FSL N/S Departure Blockline Departures (in feet) E/W Departure 1647’ FWL E/W Departure

X: 983,727.34 X: Lambert X-Y

Coordinates Y: 10,328,208.22 Y:

Latitude: 28° 26’ 42.581” N Latitude: Latitude/ Longitude Longitude: 89o 02’ 38.135” W Longitude

TVD (Feet): MD (Feet): Water Depth (Feet): 2642’

Anchor Locations for Drilling Rig or Construction Barge

Anchor Name Area/Block X Coordinate Y Coordinate Length on Seafloor



# PUBLIC INFORMATION

# Amended 07/21/11 Appendix A OCS PLAN INFORMATION FORM (CONTINUED Include one copy of this page for each proposed well/structure

MMS Form MMS-137 Page 2 of 2 Proposed Well/Structure Location
Well or Structure Name/Number: MC 547 (Lo cation C) - Well No. 3 Subsea Completion

Anchor Radius (if applicab le) in feet 9,000’ X Yes No

SURFACE BOTTOM HOLE

Lease No. OCS-G-27277

Area Name MC

Block No. 503

N/S Departure 460’ FSL N/S Departure Blockline Departures (in feet) E/W Departure 1794’ FW L E/W Departure

X: 983,873.67 X: Lambert X-Y

Coordinates Y: 10,328,140.05 Y:

Latitude: 28° 26’ 41.930” N Latitude: Latitude/ Longitude Longitude: 89o 02’ 36,483W Longitude:

TVD (Feet): MD (Feet): Water Depth (Feet): 2642’

Anchor Locations for Drilling Rig or Construction Barge

Anchor Name Area/Block X Coordinate Y Coordinate Length on Seafloor



# PUBLIC INFORMATION

# ATTACHMENT B

WELL LOCATION PLATS

PUBLIC INFORMATIONLII 0

1647'

FWL 

### Surface

io

N 1 

## 3 Loc B • 

## Y= 10,327,680 

# LLOG EXPLORATION OFFSHORE, INC.

OCS-G 27277



# MC 503

o o 03 c\I 

# io a) c\i' IN: 

# oo a) 0) 

# a)

II II

>< ><



# MC 547

LLOG EXPLORATION OFFSHORE, INC.

OCS-G 32334

SURFACE LOCATION B:
X: 983,727.34 Y: 10,328,208.22 Lat: 28 deg, 26 min, 42.581 sec Long: 89 deg, 02 min, 38.135 sec (NAD27) 

# PUBLIC

LLOG EXPL OFFSHORE

Mississippi Canyon Block 503/547

Gulf of Mexico



# LOCATION MAP

5111

0' 1000' 2000' 

## Geo: John Dough tieX= 982,080X= 997,920X= 982,080X= 997,920 

# LLOG EXPLORATION OFFSHORE, INC.

OCS-G 27277



# MC 503

MC 547

LLOG EXPLORATION OFFSHORE, INC.

OCS-G 32334 Surface

Loc C460’FSL 1794’ FWL 

## Y= 10,327,680



# Mississippi Canyon 503/547

OCS-G- 27277 / 32334



# Location Map

0’ 1000’ 2000’ Geo: John Doughtie Date: June 2011 

# PUBLIC

SURFACE LOCATION C:
X: 983,873.67 Y: 10,328,140.00 Lat: 28 deg, 26 min, 41.930 sec Long: 89 deg, 02 min, 36.483 sec (NAD27)

# ATTACHMENT C

BATHYMETRY/ANCHORING ASSESSMENT AND

SENSITIVE SESSILE BENTHIC COMMUNITY

STATEMENT

PUBLIC INFORMATIONGARDLINE

--- SURVEYS INC



# LLOG EXPLORATION COMPANY

3D GEOHAZARD ASSESSMENT

GULF OF MEXICO

MISSISSIPPI CANYON

BLOCK 503

PROPOSED MC547-B (#2) AND MC547-C (#3)

WELL LOCATIONS

ANCHORING ASSESSMENT AND SENSITIVE SESSILE

BENTHIC COMMUNITY STATEMENT

JULY 2011

Gardline Project Ref. 6558

Report Status Final

Issue Date July 08, 2011

Gardline Surveys Inc
1500 Bingle Road, Houston, Texas 77055, USA
Telephone 713 481 4630 Fax 713 464 8275 www.gardline.comGARDLINE

SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



# REPORT AUTHORIZATION AND DISTRIBUTION

Report Status Final

Issue Date July 08, 2011

Compilation Geophysicist Andrew Haigh

Authorisation Geophysics

Quality Assurance A R Haigh

M DeLeon

Distribution

6 Copies

LLOG Exploration

1001 Ochsner Blvd

Suite 200

Covington, LA 70433

For attention of:

Carol EatonGAR DONE

SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



# TABLE OF CONTENTS

REPORT AUTHORIZATION AND DISTRIBUTION ii

SERVICE WARRANTY iii

TABLE OF CONTENTS iv

LIST OF FIGURES

LIST OF CHARTS vi

ANCHORING ASSESSMENTS

SENSITIVE SESSILE BENTHIC COMMUNITY STATEMENTS 7

ivGARDLINE

- SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



# LIST OF FIGURES

Proposed MC547-B (#2) Well Location

1 Anchor Plat

2 Biological, Physical and Socio-economic Plat

Proposed MC547-C (#3) Well Location

1 Anchor Plat

2 Biological, Physical and Socio-economic PlatGARDLINE

SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



# LIST OF CHARTS

The following charts at a scale of 1"=1,000ft (1:12,000) are enclosed:

Chart No Title Drawing No

1 Seabed Depth - Anchor Radius (MC547-B (#2)) 6558.01

2 Seabed Morphology - Anchor Radius (MC547-B (#2)) 6558.02

3 Seabed Amplitude - Anchor Radius (MC547-B (#2)) 6558.03

1 Seabed Depth - Anchor Radius (MC547-C (#3)) 6558.04

2 Seabed Morphology - Anchor Radius (MC547-C (#3)) 6558.05

3 Seabed Amplitude - Anchor Radius (MC547-C (#3)) 6558.06

Biological, Physical and Socio-Economic 6558.07

viGARDLINE



### --.-- - SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



# ANCHORING ASSESSMENTS

1

## GARDLINE

SURVEYS INC
LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## ANCHORING ASSESSMENT
Proposed MC547-8 (#2) Well Location with a surface location in MC503

Proposed MC547-B (#2) with a surface location in MC503

Location Coordinates

NAD 27 Datum Clarke 1866 Ellipsoid UTM Zone 16N



## Latitude 28° 26' 42.58" North Easting 983,727 US ft E

Longitude 89° 02' 38.14" West Northing 10,328,208 US ft N

FWL of Mississippi Canyon 503 1,647 US ft Inline 13807

FSL of Mississippi Canyon 503 528 US ft Crossline 16143

Water Depth: -2,632 ft Slope: 2.1° ESE

Nearest Shoreline 40 Miles @ 326.5°

Port of Operation Fourchon 84 Miles @ 304.5°

Nearest Manned Platform MC280-A 16.5 Miles @ 336.25°



## Anchor Pattern:

LLOG Exploration Company has not as yet issued a specific anchor spread to retain the
drilling rig. The anchor radius illustrated on Plats and Charts for the proposed well location is

the maximum predicted radius of 9,000ft. An anchor-spread pattern can be designed as an

addendum to this report, if required, after the drilling rig has been identified. The anchor

pattem will be designed to avoid any infrastructure and potentially sensitive seabed habitats.

Bathymetry
Water depth at the proposed MC547-B (#2) well location is -2,632ft below sea-surface. The

seafloor deepens evenly to the ESE at 2.1°.

Seabed Morphology, Faults and Sensitive Sessile Benthic Communities

The seabed within the radius of the proposed anchor pattern deepens evenly to the

southeast.

A headwall of an ancient surficial slump occurs in the extreme northeast of the 9,000ft radius.

Localized sites with potential for sensitive sessile benthic communities occur 1,700ft to the

NNW and 8,280ft to the west of the proposed location. These regions will be avoided by all

anchoring operations.

No seabed faults are observed.

No other features, which may impact anchor emplacement, are observed within the 9,000ft

anchor radius.

All anchors will be positioned using a precise DGPS system.

2GARDLINE

- SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring 

### & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## Charts 1, 2, and 3 illustrate an anchor radius of 9,000ft for the proposed location at

1"=1,000ft. Proposed Location Anchor Plat (overleaf) illustrates the anchor radius at

1"=3,000ft.

3LN:N\0917Z-4'



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Wells



## 0 3,000

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## i 1 

# Plat (MC547-B

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# (#2))

Depth in feet below sea surface

contoured at 25fl intervals

Fluid expulsion site favorable for sessile benthic community development



## 12,000 Feet

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### to seabed,

sensitive

6 ,



## Chart scale 1" = 3,000'

6,000

I 

## I i i 1 1 l j i I



## 0 600 1,200 2,400 MetersGARDLINE

SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## ANCHORING ASSESSMENT
Proposed MC547-C (#3) Well Location with a surface location in MC503

Proposed MC547-C (#3) with a surface location in MC503

Location Coordinates

NAD 27 Datum Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 26' 41.93" North Easting 983,874 US ft E

Longitude 89° 02' 36.48" West Northing 10,328,140 US ft N

FWL of Mississippi Canyon 503 1,794 US ft [Nine 13808

FSL of Mississippi Canyon 503 460 US ft Crossline 16140

Water Depth: -2,638 ft Slope: 2.1° ESE

Nearest Shoreline 40 Miles @ 326.5 °

Port of Operation Fourchon 84 Miles @ 304.5°

Nearest Manned Platform MC280-A 16.5 Miles @ 336.25°

Anchor Pattern:



## LLOG Exploration Company has not as yet issued a specific anchor spread to retain the
drilling rig. The anchor radius illustrated on Plats and Charts for the proposed well location is

the maximum predicted radius of 9,000ft. An anchor-spread pattern can be designed as an

addendum to this report, if required, after the drilling rig has been identified. The anchor

pattern will be designed to avoid any infrastructure and potentially sensitive seabed habitats.

Bathymetry
Water depth at the proposed MC547-C (#3) well location is -2,638ft below sea-surface. The

seafloor deepens evenly to the ESE at 2.1°.

Seabed Morphology, Faults and Sensitive Sessile Benthic Communities

The seabed within the radius of the proposed anchor pattern deepens evenly to the

southeast.

A headwall of an ancient surficial slump occurs in the extreme northeast of the 9,000ft radius.

Localized sites with potential for sensitive sessile benthic communities occur 1,800ft to the

NNW and 8,420ft west of the proposed location. These regions will be avoided by all

anchoring operations.

No seabed faults are observed.

No other features, which may impact anchor emplacement, are observed within the 9,000ft

anchor radius.

All anchors will be positioned using a precise DGPS system.

5

# 4

CAROLINE

- SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## Charts 1, 2, and 3 illustrate an anchor radius of 9,000ft for the proposed location at
1"=1,000ft. Proposed Location Anchor Plat (overleaf) illustrates the anchor radius at

1"=3,000ft.

6

## ■



# %\t % \% • •
•

Mississippi Canyon Block 503 (OCS-G27277) •

to ,33'.0001



### ( 71 Mississippi Canyon Block 547 (OCS-G18257)



# t 

# •

10.320



# Anchor Plat (MC547-C (#3))

-270 Depth in feet below sea surface to seabed,

contoured at 25ft intervals Proposed MC547-C (#3) Well Location (983,874ft E, 10,328,140ft N)

):( Existing Wells Fluid expulsion site favorable for sensitive sessile benthic community development

Block Boundary



## Chart scale I" = 3,000'

12,000 Feet 6,000

2,400 Meters 28'2103



### --: ) .Proposed MC547-C (k) 

### Well



# ° t i

. 2 

# 1 a ti 13 0 

# °

1/29.ftALus‹) GAR DL INE

SURVEYS 

### INC LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



# SENSITIVE SESSILE BENTHIC COMMUNITY STATEMENTS

7GARDLINE

SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## Sensitive Sessile Benthic Community Statement

MC547-B (#2) with a surface location in MC503



# LLOG Exploration Company

July 08, 2011

US Department of the Interior
Bureau of Energy Management, Regulation and Enforcement

1201 Elmwood Park Blvd.

New Orleans, LA 70213

Reference: Sensitive Sessile Benthic Community Summary



## Mississippi Canyon, Block 503
OCS-(G 31199)

Ladies/Gentlemen:
Gardline Surveys Inc was contracted by LLOG Exploration Company to prepare an addendum to Site
Clearance Letter for the proposed MC547-B (#2) well location with a surface location in Mississippi
Canyon, Block 503 (OCS-G 27277). This current well location is within 50ft of the previously
submitted MC503-E well location drilled in February 2010. This letter addresses location proximity to
potential sensitive sessile benthic community sites. LLOG Exploration Company will be drilling this
well from an anchored drilling drilling module, and anchors will impact seabed.

This sensitive sessile benthic community summary letter is issued as a supplement to Gardline Report
No.6558 entitled: 3D Geohazard Assessment, Mississippi Canyon MC502, 503, 545 and 546, dated
October 2006, and the well clearance letter for the proposed MC503-E location, dated May 23, 2008.
A Biological, Physical and Socioeconomic Map is included at the end of this appendix illustrating the

areas of potential seabed impact.

Potential Sensitive Sessile Benthic Communities.
Features or areas that could support high density sensitive sessile benthic communities are located
within 2,000ft of any proposed mud and cuttings discharge location.

However with reference to email dated July 06, 2011 between Leedy, Daniel (Herb) at BOEMRE and
Keith, Matt at Tesla Offshore, in this instance mitigation to within 1,500ft will be applied.

Move forward with the plan, but BOEMRE would apply mitigation that the operator could not drill the well closer

than 15008 from the potential habitat.

We understand that some plans were approved under the previous NTL, and are now being reviewed under the
current NTL. We are trying to work with the operator while still providing full protection for the chemosynthetic

communities.

8

### CAROLINE

—...--_ __ - - SURVEYS INC LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## Proposed MC547-B (#2) with a surface location in MC503

Location Coordinates

NAD 27 Datum Clarke 1866 Ellipsoid UTM Zone 1614



## 4 Latitude 28° 26' 42.58" North Easting 983,727 US ft E

Longitude 89° 02' 38.14" West Northing 10,328,208 US ft N

FWL of Mississippi Canyon 503 1,647 US ft Inline 13807

FSL of Mississippi Canyon 503 528 US ft Crossline 16143

Water Depth: -2,632 ft Slope: 2.1° ESE

Nearest Shoreline 40 Miles @ 326.5°

Port of Operation Fourchon 84 Miles @ 304.5°

Nearest Manned Platform MC280-A 16.5 Miles @ 336.25°



## Nearest potential sensitive sessile benthic community to the proposed location is a 

## fluid

expulsion site 1,700ft NNW of the proposed well location.



## Conclusions and Recommendations: The proposed MC547-B (#2) well location will not impact any

sites favorable for development of sensitive sessile benthic communities. Anchoring activity will pass

over and not impact the sites of possible sensitivity. All anchors will be emplaced using DGPS

positioning.

Sincerely,

Jaime Mata

LLOG Exploration Company

9

### _3000 

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et

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## ‘ k - Mississippi Canyon Block 503 (OCS-G27277)



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## 8 10,320,000



### Proposed MC547-B (#2) Well Location

(983,727ft E, 10,028,208ft N) Fluid expulsion site favorable for sensitive sessile benthic community development

Proposed MC547-C (83) Well Loco on MEM (983,874t1 E, 10,028,140ft N)

e Block Boundary 

# r i Existing wells



## Chart scale 1" = 2,000'

0 750 1,500 3,000 Feet

I 

# Biological, Physical & Socio-Economic Plat 

# I

0 250 500 I

1,000 MetersCAROLINE

SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## Sensitive Sessile Benthic Community Statement

MC547-C (#3) with a surface location in MC503



# LLOG Exploration Company

July 08, 2011

US Department of the Interior
Bureau of Energy Management, Regulation and Enforcement

1201 Elmwood Park Blvd.

New Orleans, LA 70213

Reference: Sensitive Sessile Benthic Community Summary



## Mississippi Canyon, Block 503

OCS-(G 31199)

Ladies/Gentlemen:
Gardline Surveys Inc was contracted by LLOG Exploration Company to prepare an addendum to Site

Clearance Letter for the proposed MC547-C (#3) well location with a surface location in Mississippi
Canyon, Block 503 (OCS-G 27277). This current well location is within 150ft of the previously
submitted MC503-E well location drilled in February 2010. This letter addresses location proximity to
potential sensitive sessile benthic community sites. LLOG Exploration Company will be drilling this
well from an anchored drilling module, and anchors will impact seabed.

This sensitive sessile benthic community summary letter is issued as a supplement to Gardline Report
No.6558 entitled: 3D Geohazard Assessment, Mississippi Canyon MC502, 503, 545 and 546, dated
October 2006, and the well clearance letter for the proposed MC503-E location, dated May 23, 2008.
A Biological, Physical and Socioeconomic Map is included at the end of this appendix illustrating the

areas of potential seabed impact.

Potential Sensitive Sessile Benthic Communities.
Features or areas that could support high density sensitive sessile benthic communities are 

## located

within 2,000ft of any proposed mud and cuttings discharge location.

However with reference to email dated July 06, 2011 between Leedy, Daniel (Herb) at BOEMRE and
Keith, Matt at Tesla Offshore, in this instance mitigation to within 1,500ft will be applied.

Move forward with the plan, but BOEMRE would apply mitigation that the operator could not drill the well closer

than 1500ft from the potential habitat.

We understand that some plans were approved under the previous NTL, and are now being reviewed under the
current NTL. We are trying to work with the operator while still providing full protection for the chemosynthetic

communities.

11< I 

# P

CAROLINE

SURVEYS INC 

### LLOG Exploration Company Gardline Report 6558

Anchoring & Benthic Community Statement — MC503 — Proposed MC547-B (#2) & MC547-C (#3) Well Locations



## Proposed MC547-C (#3) with a surface location in MC503

Location Coordinates

NAD 27 Datum Clarke 1866 Ellipsoid UTM Zone 16N



## Latitude 28° 26' 41.93" North Easting 983,874 US ft E

Longitude 89° 02' 3E48" West Northing 10,328,140 US ft N

FWL of Mississippi Canyon 503 1,794 US ft Inline 13808

FSL of Mississippi Canyon 503 460 US ft Crossline 16140

Water Depth: -2,638 ft Slope: 2.1° ESE

Nearest Shoreline 40 Miles @ 326.5°

Port of Operation Fourchon 84 Miles @ 304.5°

Nearest Manned Platform MC280-A 16.5 Miles @ 336.25 °



## Nearest potential sensitive sessile benthic community to the proposed location is a fluid

expulsion site 1,700ft NNW of the proposed well location.



## Conclusions and Recommendations: The proposed MC547-C (#3) well location will not impact any

sites favorable for development of sensitive sessile benthic communities. Anchoring activity will pass
over and not impact the sites of possible sensitivity. All anchors will be emplaced using DGPS

positioning.

Sincerely,

Jaime Mata
LLOG Exploration Company

12

### _300 0



# t s )S P ■

Mississippi Canyon Block 503 (OCS-G27277)

0,330,000

10,320,000 

### • Mississippi Canyon Block 547 6 (1:PCS-GI 8257)

vs* 

## 7°C

(

8

- 

## 275

•• 

# ■

Block Boundary 

## ■ 5 Proposed MC547-B (#2) Well Location

(983,727ft E, 10,028,208ft N)



## U Proposed MC547-C (#3) Well Location MINN (983,87411E, 10,028,140ft N) 

# •

ff Existing wells Fluid expulsion site favorable for sensitive

le 

### benthic community development



# Biological, Physical & Socio-Economic Plat Chart scale 1" = 2,000' 0 750 1,500 3,000 Feet

I I

0 250 500 1,000 Meters- 

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I 5 (

# APPENDIX B

GENERAL INFORMATION (30 CFR Part 250.213 and 250.243)

A. APPLICATION AND PERMITS

The following Federal/State application will be submitted for the activities provided for in this Plan (exclusive of BOEMRE permit applications and general permits issued by the EPA and COE)

Application/Permit Issuing Agency Status

CZM Consistency Certification CMD Pending Rig Move Reports USCG, MWA and NGA Pending



# B. DRILLING FLUIDS

Type of Drilling Fluid 

# Estimated Volume of Drilling Fluid to be used per Well
Water Based (seawater, freshwater, barite) 76,000 bbls Oil –based (diesel, mineral oil) N/A Synthetic-based (internal olefin, ester) 270



# C. NEW OR UNUSAL TECHNOLOGY

LLOG does not propose using any new a nd/or unusual technology for the proposed operations in this plan.

D. BONDING STATEMENT

The bond requirements for the activities a nd facilities proposed in this Revised Exploration Plan are satisfied by an areawide bond furnished and maintained according to 30 CFR Part 256, subpart I; NTL No. 2006-G16, “Guidelines for General Lease Surety Bonds,” and additional security under 30 CFR 256.43(d)

and National NTL No. 2003-N06 “S upplemental Bonding Procedures”.

E. OIL SPILL FINANCIAL RESPONSIBILITY (OSFR)

LLOG Exploration Offshore, L.L. C (BOEMRE Company No. 02058) will demonstrate oil spill financial responsibil ity for the facilities proposed in this Revised Exploration Plan according to 30 CFR Part 253, and NTL 99-N01, “Guidance for Oil Spill Fi nancial Responsibility fo r Covered Facilities.”.

# Amendment 07/12/11

APPENDIX C


# GEOLOGICAL AND GEOP HYSICAL INFORMATION (30 CFR Part 250.214 and 250.244)

A. Structure Maps - Attachment D – Well Location B & C

B. Cross Section Maps – Attachment E – Well Location B & C

C. Structural Cross Sections– Attachment F- Well Locations B & C

D. Biostratigraphic/Lithostratigraphic Columns – Attachment G

Well Locations B & C



# PROPRIETARY INFORMATION

# ATTACHMENT D

STRUCTURE MAPS

PROPRIETARY INFORMATION

# ATTACHMENT E

CROSS SECTION MAPS

PROPRIETARY INFORMATION

# ATTACHMENT F

STRUCTURAL CROSS SECTIONS

PROPRIETARY INFORMATION

# ATTACHMENT G

BIOSTRATIGRAPHIC/LITHOSTRATIGRAPHIC

COLUMN

PROPRIETARY INFORMATION

# Amended 07/11/11

APPENDIX D

WASTE AND DISCHARGE INFORMATION (30 CFR PART 250.217 AND 250.248)

A. Projected Generated Waste

See Attached Table I



# B. Projected Ocean Discharges

See Attached Table II



# C. Modeling Report

Not applicable. Proposed activities will be covered by U.S. EPA NPDES

General Permit.TABLE 1.WASTES YOU WILL GENERATE,TREAT AND DOWNHOLE DISPOSE OR DISCHARGE TO THE GOMpleasespecifyif theamount reported Isatotal orperwell amountiii•?•ilTypeofVaste'CompositionIProjected AmountElDischargerate!DischargeMethodII AnsweryesornoIdischargeoverboard NoilONpreocpano mama]illDischargeoverboard NoDischargeoverboard Noichlorinateand dischargeoverboardNoIfreeoil)NoChlorinateanddischargeoverboard NoTestforoil and greaseanddischargeoverboardNoTestforoil and greaseanddischargeoverboard.NoTestforoil and greaseanddischargeoverboard.ThisexcludesdearbrinescontainingZincNoIONIIONIDischargeoverboardINoIONIDischargeat mudlineNoDischargeoverboard NoO"IONVNDyanIndividual permit ertonere!NODESPenultGeneral[NOTE:If youwill nothaveatypeofwaste,enterNA intherow.complywith therequirementsof theNPDESpermit.I8,122 bbls/day/wellIlatz/naP/SIggLOPIlem/ABP/olgg 95IIlem/NeggX2.7 bbls/hr/well1.8bbls/ftwell0to167 bbls/hr/well20bbls/hr/well100bbls/hr/wellI110/4/x4PAgg096'91360 bbls/hr/well16,350bbls/hr/well[VNnormenx114;8,042 bbls/well5,361bbls/well0 to47,261 bbls/wel1IletA/SICAOM,I500bbls/well0 to1000;07----"Ilabls/well300 bbls/well0 to10,000bbls/wellvNSanitarywastefromIrvingquartersMiscwasteforlivingquartersProcessed sanitarywastefromlivingquartersAccumulated drainageduetorainfallNPDES approved treatmentfluidusedforwell operationsClearbrinesusedforcompletion••erationsUncontaminated spent seawaterusedforpotablewatergenerationunitTreatedfreshwaterused control ofsubseablowout preventersUncontaminated seawaterusedforballast controlUncontaminatedfreshwaterandseawateroverflow/leakageaccumuatedfrommachineryoperationsExcesscement slurryand mixwaterusedforcementingoperationNPDES allowedUncontaminated seawaterusedforfirecontrol system1Uncontaminated seawaterusedforheat exchangeroperationsused tocool machineryYNWater-based drillingfluidbeMinhIf velaexpect vOrteentional wereEXAMPLE:SanitarywastewaterDomesticwasteSanitarywasteoak? If yea,therewillbeDeckDeanneDeck Drainage'duct wedtreetMent,eorneimfen,ortverkover?Well treatmentfluidsWell completionfluidsDesalinizationunit dischargeBlowout preventfluidBallastwaterBilgewaterExcesscementatseafloorFirewaterCoolingwaterduceharicot:Inkiest If enfillInfororoduaxl water.Produced water

app•amnia LnatTABLE2.WASTESYOU WILL TRANSPORT AND/OR DISPOSEOFONSHOREpleasespecifywhethertheamount reported isatotal orperwellSolid andLiquid WastesIIPreheated generated wastetransportationWasteDisposal'Disposal MethodI1VNPaidAaedpercAoeuVNVNpepAoistdfatadfoepepAoeuApproveddIspowell InjectionorlandfarmRecycledwnowyueowdox'VN6750bbls/wellVNVNVNX lb/well4000lbs/ well2007Is/well2000 bbls/wellIliew/ alga0lCompositionTransportMethod Name/Locationof FacilityWhigs.0BelowdeckstoragetanksonoffshoreNewportEnvironmental ServicesInternal olefin,estersupport vesselsInc.,Ingleside,TXNewparkTransferStation.Inverteddiesel based mud NA Fourchon,LABargedIn25bblscuttingboxesand/InternalM in,esternbased mud orliquid mud tanksforsupplyvesselsFNIoeuwparchoNewprk TransferLraAnsterStation,IDrill cuttingswetted with WBM TransferStation,generated whiledrillingNANewparkpill cuttingswetted with SBM IlliNewparkTransferStation,generated whiledrilling.NAFourchon,LADrill cuttingswetted-with inverted IIIIMINewpark TransferStation,dieselbased mudMENA INIFourchon,LA 

# iu1-1.51VIC,paper,aluminumbargedina storagebinARC,NewIberia,LABlanchard Landfill,GoldenPlastic,paper,aluminumBargedinastoragebinMeadows,LA=Barged inUSCGapproved transfertote..Spent oilfrommachineryWanks.ML&LServices,Fourchon,LA/ Newpark TransferStation,sFourchon,LAILSWuarisaliclwaantserw/SBMresidueandoBralrigcleduidInm2u5dfbabniskstorinsgulob°131YxevseassndelISpent treatment and / ordamagedBarged In25 bbiscuttingboxesand /chemicalsusedinoperationsorcuttingboxesIA intherow.TypeofWastecAptmt-Lc.oymneuv-based arming(lordor mudOil-baseddrillingfluid ormudSynthetic-based drillingfluidormudCuttingswetted with Water-based fluidCuttingswettedwith Synthetic-based fluidCuttingswettedwith oil-based fluidsProduced sandWyattIfinwastesMet WeMe Ow*EXAMPLE:crash and debris(recylables)Trash and debrisnoP0511Wash waterChemical product wastes



# 1

# MISSISSIPPI CANYON BLOCK 503/547

OCS-G-27277/OCS-G-32334 LEASES

REVISED EXPLORATION PLAN

APPENDIX E

OIL SPILL INFORMATION (30 CFR PART 250.219 AND 250.250)

A. Oil Spill Response Planning

All the proposed activities in this prev iously approved Exploration Plan will be covered by the Oil Spill Response Plan filed by LLOG (MMS Operator No. 02058) in accordance with 30 CFR 254 a nd approved on June 3, 2009, modified October 5, 2010, November 10, 2010, Ja nuary 13, 2011, March 15, 2011 and last modification received June 8, 2011 (not cu rrently approved). OSRP Certification letter was submitted June 30, 2011 and accepted by BOEMRE on July 11, 2011.



# B. Spill Response Sites

The following locations will be used in the event an oil spill occurs as a result of the proposed activities.

Primary Response Equipment

Location Pre-Planned Staging Location(s)

Houma, LA Fort Jackson, LA



# C. OSRO Information

The O’Brian Group (TOG) will provide tr ained personnel capable of providing supervisory management of the oil spill response in addition to contacting and deploying cleanup personnel and equipment

LLOG utilizes Clean Gulf Associates (CGA) as it’s primary provider for equipment, which is an industry cooper ative owning an inventory of oil spill clean-up equipment. CGA is suppor ted by the Marine Spill Response Corporation’s (MSRC), which is responsib le for storing, inspecting, maintaining and dispatching CGA’s equipment. Th e MSRC STARS network provides for the closest available personnel, as well as an MSRC supervisor to operate the equipment.

# D. Worst-Case Scenario Information

Category Regional OSRP Revised EP Type of Activity Exploratory MODU Exploratory MODU Facility Surface Location Mississippi Canyon Block 547 Mississippi Canyon Block 547 Facility Description Well Location Well No. SS002 (Location B) Well No. SS002 (Location B)

Distance to Nearest Shoreline (Miles) 38.4 miles 38.4 miles

Volume: Storage Tanks (total) Facility Piping (total) Lease Term Pipeline Uncontrolled Blowout (day) Barging

Potential 24 Hour Volume (bbls) Total Volume (Max duration 99 day) 225,144 bbls

22,289,256 bbls 225,144 bbls

22,289,256 bbls Type of Liquid Hydrocarbon Condensate Condensate API Gravity 28o 28o



# NTL2010-N06 worst case discharge informati on was submitted by letter February 28, 2011 and received by BOEMRE March 2, 2011 for the Mississippi Canyon Block 547 Well No. SS002 (Location B). LLOG accepts the BOEMRE’s worst case discharge

value of 225,144 bbls potential 24 hour volume.

* NOTE: LLOG used Propser results from the WCD model on the #2 well and weighted the API based on the discharge rates of each zone.

# Oil Spill Response Discussion

## SPILL RESPONSE DISCUSSION

For the purpose of NEPA and Coastal Zone Management Act analysis, the largest spill volume originating from the proposed activity would be a well blowout during drilling operations, estimated to be 225,144 barrels of crude oil with an API gravity of 28°.

Land Segment and Resource Identification

Trajectories of a spill and the probability of it impacting a land segment have been projected utilizing information in the BOEM Oil Spill Risk Analysis Model (OSRAM) for the Central and Western Gulf of Mexico available on the BOEM website. The results are shown in Figure 1. The BOEM OSRAM identifies an 8% probability of impact to the shorelines of Plaquemines Parish, LA within 30 days. Plaquemines Parish includes Barataria Bay, the Mississippi River Delta, Breton Sound and the affiliated islands and bays. This region is an extremely sensitive habitat, and serves as a migratory, breeding, feeding and nursery habitat for numerous species of wildlife. Beaches in this area vary in grain particle size, and can be classified as fine sand, shell or perched shell beaches. Sandy and muddy tidal flats are also abundant.

Response

LLOG Exploration Offshore, L.L.C. will make every effort to respond to the Worst Case Discharge as effectively as practicable. A description of the response equipment available to contain and recover the Worst Case Discharge is shown in Figure 2.

Using the estimated chemical and physical characteristics of crude oil, an ADIOS weathering model was run on a similar product from the ADIOS oil database. The results indicate 8% or 18,011 barrels of crude oil would be evaporated/dispersed within 24 hours, with 207,133 barrels remaining.

WCD Volume

Less 22% natural evaporation/dispersion

Remaining volume

Oil addressed by aerial dispersants

Oil addresSed by in-situ burnt& 225,144

18,011

7,540

Figure 2 outlines equipment, personnel, materials and support vessels as well as temporary storage equipment available to respond to a spill of 225,144 barrels. The list estimates individual times needed for procurement, load out, travel time to the site and deployment. Figure 2 

## also indicates how operations will be supported.

If aerial dispersants are utilized, 8 sorties (9,600 gallons) from two of the DC-3 aircrafts and 4 sorties (8,000 gallons) from the Basler aircraft should disperse approximately 7,540 barrels of product. If the conditions are favorable for in-situ burning, the proper approvals have been obtained and the proper planning is in place, in-situ burning of oil may be attempted. Using estimates based on the Deepwater Horizon spill of 2010, up to 5% or 10,356 barrels of the total daily Worst Case Discharge volume could be burned. Slick containment boom would be immediately called out and on-scene as

## soon as possible. Offshore response strategies may include attempting to skim utilizing the HOSS

Barge, the 

## RN Grand Bay, nine Fast Response Units (FRUs), two Aqua Guard Triton RBS skimmers, and eleven sets of Koseq Skimming Arms, with a total derated skimming capacity of 318,609 barrels. Temporary storage associated with skimming equipment equals 31,765 barrels. If additional storage is needed, three 23,000 barrel storage barges, one 25,000 barrel storage barge, one 47,000 barrel storage barge, and one 153,269 barrel storage barge may be mobilized and centrally located to provide temporary storage allowing the skimmers to stay in the area of operations as much as possible. Safety is first priority. Air monitoring will be accomplished and operations deemed safe prior to any containment/skimming attempts.

If the spill went unabated, shoreline impact in Plaquemines Parish, Louisiana would depend upon existing environmental conditions. Shoreline protection would include the use of CGA's near shore and shallow water skimmers with a totaled derated skimming capacity of 56,975 barrels. Temporary storage associated with skimming equipment equals 1,820 barrels. If additional storage is needed, three 20,000 barrel storage barges may be mobilized and centrally located to provide temporary storage allowing the skimmers to stay in the area of operations as much as possible. Onshore response may include the deployment of shoreline boom on beach areas, or protection and sorbent boom on vegetated areas. MSAs with AMPOL and Oil Mop will ensure the availability of 147,000

feet of 18" shoreline boom. Figure 2 outlines estimated times needed for procurement, load out, travel time to the site and deployment. Strategies would be based upon surveillance and real time trajectories that depict areas of potential impact given actual sea and weather conditions. The State of Louisiana Initial Oil Spill Response Plan for Plaquemines Parish and Unified Command would be consulted to ensure that environmental and special economic resources would be correctly identified and prioritized to ensure optimal protection. Shoreline protection strategies depict the protection response modes applicable for oil spill clean-up operations. The State of Louisiana Initial Oil Spill Response Plan provides detailed shoreline protection strategies for this area, and it describes necessary action to keep the oil spill from entering Louisiana's coastal wetlands, based on the assumption that removal of the released oil will be much easier and less damaging to fragile coastal ecosystems if done in the open waters of the Gulf of Mexico. Supervisory personnel have the optionto modify the deployment and operation of equipment allowing a more effective resporise to sitespecific circumstances. LLOG Exploration Offshore, L.L.C.'s contract Spill Management Team holds a copy of the State of Louisiana Initial Oil Spill Response Plan.

## Initial Response Considerations



## Actual actions taken during an oil spill response will be based on many factors to include but not be

limited to:

• Weather

• Equipment and materials availability

• Ocean currents and tides

• Location of the spill

• Product spilled

• Amount spilled

• Environmental risk assessments

• Trajectory and product analysis

• Well status, i.e., shut in or continual release

LLOG Exploration Offshore, L.L.C. will take action to provide a safe, aggressive response to contain and recover as much of the spilled oil as quickly as it is safe to do so. In an effort to protect the environment, response actions will be designed to provide an "in-depth" protection strategy meant to recover as much oil as possible as far from environmentally sensitive areas as possible. Safety will take precedence over all other considerations during these operations.

Upon notification of a spill

, 

## the following actions will be taken:

• Information will be confirmed

• An assessment will be made and initial objectives set

• OSROs and appropriate agencies will be notified

• ICS 201, Initial Report Form completed

• Initial Safety plan will be written and published

• Unified Command will be established

o Overall safety plan developed to reflect the operational situation and coordinated objectives

o Areas of responsibility established for Source Control and each surface operational site

o On-site command and control established

Offshore Response Actions

Equipment Deployment


## Surveillance

• Surveillance Aircraft: within two hours of 01 notification, or at first light

• Provide trained observer to provide on site status reports

• Provide command and control platform at the site if needed

• Continual surveillance of oil movement by remote sensing systems, aerial photography and

visual confirmation

• Continual monitoring of vessel assets using vessel monitoring systems

Dispersant application assets

• Put ASI on standby

• With the FOSC, conduct analysis to determine appropriateness of dispersant application

• Gain FOSC approval for use of dispersants on the surface

• Deploy aircraft in accordance with a plan developed for the actual situation

• Coordinate movement of dispersants, aircraft, and support equipment and personnel

• Confirm dispersant availability for current and long range operations

• Start ordering dispersant stocks required for expected operations

## Containment boom

• Call out early and expedite deployment to be on scene ASAP

• Ensure boom handling and mooring equipment is deployed with boom

• Provide continuing reports to vessels to expedite their arrival at sites that will provide for their
most effective containment

• Use Vessels of Opportunity WOO) to deploy and maintain boom



## Dedicated off-shore skimming systems
General

• Deployed to the highest concentration of oil

• Assets deployed at safe distance from aerial dispersant and in-situ bum operations



## CGA HOSS Barge

• Use in areas with heaviest oil concentrations

• Consider for use in areas of known debris (seaweed, and other floating materials)



## CGA FRUs

• To the area of the thickest oil

• Use as far off-shore as allowed

T&T 

## Koseg Skimming Systems

• To the area of the thickest oil

• Use as far off-shore as allowed

• VOOs with a minimum of 2,000 bbls storage capacity



## Storage Vessels

• Establish availability of CGA contracted assets

• Early call out (to allow for tug boat acquisition and deployment speeds)

• Phase mobilization to allow storage vessels to arrive at the same time as skimming systems

• Position as closely as possible to skimming assets to minimize offloading time



## Vessels of Opportunity (V00)

• Use LLOG Exploration Offshore, L.L.C.'s contracted resources as applicable

• Industry vessels are usually best for deployment of Vessel of Opportunity Skimming Systems (VOSS)

• Acquire additional resources as needed

• Consider use of local assets, i.e. fishing and pleasure craft

• Expect mission specific and safety training to be required

• Plan with the US Coast Guard for vessel inspections



## In-situ Bum assets

• Determine appropriateness of in-situ bum operation in coordination with the FOSC and
affected SOSC

• Determine availability of fire boom and selected ignition systems

• Start ordering fire boom stocks required for expected operations

• Contact boom manufacturer to provide training if required

• Determine assets to perform on water operation

• Build operations into safety plan

• Conduct operations in accordance with an approved plan

## Near Shore Response Actions

Timing

• Put near shore assets on standby and deployment in accordance with planning based on the actual situation, actual trajectories and oil budgets

• VOO identification and training in advance of spill nearing shoreline if possible

• Outfitting of VOOs for specific missions

• Deployment of assets based on actual movement of oil

Considerations

• Water depth, vessel draft

• Shoreline gradient

• State of the oil

• Use of VOOs

• Distance of surf zone from shoreline

Equipment Deployment

Surveillance

• Provide trained observer to direct skimming operations

• Continual surveillance of oil movement by remote sensing systems, aerial photography and

visual confirmation

• Continual monitoring of vessel assets

Dispersant Use

• Generally will not be approved within 3 miles of shore or with less than 10 meters of water depth

• Approval would be at Regional Response Team level (Region 6)

Vessel Deployment Dedicated Near Shore skimming systems

• FRVs

• Egmopol and Marco SWS

• Operate with aerial spotter directing systems to observed oil slicks

VOO

• Use LLOG Exploration Offshore, L.L.C.'s contracted resources as applicable

• Industry vessel are usually best for deployment of Vessel of Opportunity Skimming Systems (VOSS)

• Acquire additional resources as needed

• Consider use of local assets, i.e. fishing and pleasure craft

• Expect mission specific and safety training to be required

• Plan with the US Coast Guard for vessel inspections

• Operate with aerial spotter directing systems to oil patches

## Shoreline Protection Operations

Response Planning Considerations

• Environmental risk assessments (ERA) to determine priorities for area protection

• Time to acquire personnel and equipment and their availability

• Previous contingency planning contained in the appropriate Area Contingency Plan, and currently (Feb 2011) for Louisiana, The State of Louisiana Initial Oil Spill Response Plan, Deep Water Horizon, dated 2 May 2010 (La. OSRP)

Actions

Placement of boom

• Position boom in accordance with the ERA based on the actual situation or the appropriate
ACP

• Assess timing of booming operations to ensure it is where it needs to be at time of impact.

Consider:

o Trajectories

o Weather forecast

o Oil Impact forecast

o Verified spill movement

o Boom, manpower and vessel (shallow draft) availability

o Near shore boom and support material, (stakes, anchors, line)

Beach Preparation

Considerations and Actions

• Use of a 10 mile go/no go line to determine timing of beach cleaning

• Shoreline Cleanup and Assessment Team Reports and recommendations

• Determination of Archeological sites and gaining authority to enter

• Monitoring of tide tables and weather to determine extent of high tides

• Pre cleaning of beaches by moving waste above high time lines to minimize waste

• Staging of equipment and housing of response personnel as close to the job site as possible

to maximize on-site work time

• Boom tending, repair, replacement and security (use of local assets may be advantageous)

• Constant awareness of weather and oil movement for resource redeployment as necessary

• In-situ bum may be considered when marshes have been impacted

• Passive clean up of marshes should considered and appropriate stocks of sorbent boom and/or sweep obtained

• Earthen berms and shoreline protection boom may be considered to protect sensitive inland

areas

## 3 foot seas, 20 knot winds

Winds more than 25 knots Visibility less than 3 nautical miles 

## Ceiling less than 1,000 feet.

8 foot seas Boom Dispersants

FRU 

## HOSS Barge/OSRB Koseq Arms

OSRV 8 foot seas

8 foot seas

4 foot seas Decanting Strategy Recovered oil and water mixtures will typically separate into distinct phases when left in a quiescent state. When separation occurs, the relatively clean water phase can be siphoned or decanted back to the recovery point with minimal, if any, impact. Decanting therefore increases the effective on-site oil storage capacity and equipment operating time. FOSC/SOSC approval will be requested prior to decanting operations. This practice is routinely used for oil spill recovery.

CGA Equipment Limitations The capability for any spill response equipment, whether a dedicated or portable system, to operate in differing weather conditions will be directly in relation to the capabilities of the vessel the system in placed on. Most importantly, however, the decision to operate will be based on the judgment of the Unified Command and/or the Captain of the vessel, who will ultimately have the final say in terminating operations. Skimming equipment listed below may have operational limits which exceed those safety thresholds. As was seen in the Deepwater Horizon (DWH) oil spill response, vessel skimming operations ceased when seas reached 5-6 feet and vessels were often recalled to port when those conditions were exceeded. Systems below are some of the most up-to-date systems available and were employed during the DWH spill.

## Environmental Conditions in the GOM

Louisiana is situated between the easterly and westerly wind belts, and therefore, experiences westerly winds during the winter and easterly winds in the summer. Average wind speed is generally 14-15 mph along the coast. Wave heights average 4 and 5 feet. However, during hurricane season, Louisiana has recorded wave heights ranging from 40 to 50 feet high and winds reaching speeds of 100 mph. Because much of southern Louisiana lies below sea level, flooding is prominent.

Surface water temperature ranges between 70 and 80°F during the summer months. During the winter, the average temperature will range from 50 and 60'F.

The Atlantic and Gulf of Mexico hurricane season is officially from 1 June to 30 November. 97% of all tropical activity occurs within this window. The Atlantic basin shows a very peaked season from August through October, with 78% of the tropical storm days, 87% of the minor (Saffir-Simpson Scale categories 1 and 2) hurricane days, and 96% of the major (Saffir-Simpson categories 3, 4 and 5) hurricane days occurring then. Maximum activity is in early to mid September. Once in a few years there may be a hurricane occurring "out of season" - primarily in May or December. Globally, September is the most active month and May is the least active month.

# FIGURE 1
TRAJECTORY BY LAND SEGMENT

Trajectory of a spill and the probability of it impacting a land segment have been projected utilizing LLOG Exploration Offshore, L.L.C.'s WCD and information in the BOEM Oil Spill Risk Analysis Model (OSRAM) for the Central and Western Gulf of Mexico available on the BOEM website using 30 day impact. The results are tabulated below.

Area/Block OCS-G Launch

Area Land Segment and/or

Resource Conditional

Probability (%) within 30 days

MC 547

Well No. SS002



## 38.4 miles from shore G32334 Central Planning

Area

58 Galveston County, TX

Jefferson County, TX Cameron Parish, LA Vermilion Parish, LA Iberia Parish, LA Terrebonne Parish, LA Lafourche Parish, LA Jefferson Parish, LA
Plaquemines Parish, LA 

## St. Bernard Parish, LA Okaloosa County, FL 30 day

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SUPPORT VESSELS AND AI RCRAFT INFORMATION (30 CFR PART 250.224 AND 250.257)

A. Diesel Oil Supply Vessels

Size of Fuel Supply

Vessel Capacity of fuel Supply

Vessel Frequency of Fuel

Transfers Route Fuel Supply Vessel

Will Take


# None N/A N/A N/A



# B. Solid and Liquid Wastes Transportation

Type of Waste Approx. Composition Total Amount Name/Location Rate Transport Method



# Trash & Debris 1000 cubic ft. River Birch

Landfill Avondale, LA N/A Storage bins on

crew boat



# C. Vicinity Map

A Vicinity Plat showing the surface location in Mississippi Canyon Block 503

relative to the shoreline and onshore base is includ ed as Attachment H.

# APPENDIX G

ONSHORE SUPPORT FACILITIES INFORMATION (30 CFR PART 250.225 AND 250.258)

A. General

The proposed surface disturbances in Mississippi Canyon Block 503 will be located approximately 38 miles from th e nearest Louisiana shoreline, and approximately 85 miles from the onshore support base.

Name Location Existing/New/Modified

Martin North Fourchon, LA Existing

LLOG will use an existing onshore base to accomplish the following routine operations:

● Loading/Offloading point for equipment supporting the offshore operations.

● Dispatching personnel and equipment, and des not anticipate the need ofr any expansion of the selected facili ties as a result of the activities proposed in this Revised Plan.

● Temporary storage for materials and equipment.

● 24 Hour Dispatcher



# B. Support Base Construction or Expansion

The proposed operations are temporary in nature and do not require any immediate action to acquire additional land or expand existing base facilities.

# ATTACHMENT H

VICINITY MAP

PUBLIC INFORMATION

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# APPENDIX H

AIR EMISSIONS

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0)O"6a)OlNMMSFORM MMS-138(December2008 -Supersedesall previousversionsofformMMS-138 which maynotbeused).

# APPENDIX I

COASTAL ZONE MANAGEMENT (CZMA)

INFORMATION

# By:

Signed By:

Date: 

# thiS

, ,—,

Certifying Official



# 01 i 19 1)-01( LLOG Exploration Offshore, L.L.C. COASTAL ZONE MANAGEMENT CONSISTENCY CERTIFICATION

REVISED EXPLORATION PLAN Type of OCS Plan



# OCS-G-27277/OCS-G-32334 LEASE

Lease Number



# MISSISSIPPI CANYON BLOCK 503/547

Area and Block

The proposed activities described in detail in the enclosed Plan comply with Louisiana's approved Coastal Zone Management Program and will be conducted in a manner consistent with such Program.

# COASTAL ZONE MANAGEMENT CONSISTENCY CERTIFICATION

REVISED EXPLORATION PLAN Type of OCS Plan



# OCS-G-27277/OCS-G-32334 LEASE

Lease Number



# MISSISSIPPI CANYON BLOCK 503/547

Area and Block

The proposed activities described in detail in the enclosed Plan comply with Mississippi's approved Coastal Zone Management Program and will be conducted in a manner consistent with such Program.

By: 

# LLOG Exploration Offshore, L.L.C.

Signed By:
Certifying Official

Date: 

# Oil 111

- )- 01 )

# COASTAL ZONE MANAGEMENT ENFORCEABLE

POLICY FOR THE STATE OF MISSISSIPPI

(Public Information)

# COASTAL ZONE MANAGEMENT ENFORCEABLE

POLICY FOR THE STATE OF MISSISSIPPI



# (Public Information)

# As authorized by the Federal Zone Management Act (CZMA), the

State of Mississippi developed a Coastal Management Program (CMP) to allow for the review of proposed Federal license and permit activities affecting any coastal use or resources in or outside the Mississippi Coastal Zone.

The OCS related oil and gas exploration and development activities having potential impact on the Mississippi Coastal Zone are based on the location of the proposed facilities, access to those sites, best practical techniques for drilling locations, drilling equipment guidelines for the prevention of adverse environmental protection, emergency plans and contingency plans.

The proposed activities addressed in this Plan are located approximately 123 miles from the nearest Mississippi Coastline.

Below are the goals identified by the State of Mississippi and LLOG's response:

Goal 1: To provide for reasonable industrial expansion in the coastal area and to

ensure the efficient utilization of waterfront industrial sites so that suitable sites are 

# conserved for water dependent industry.

The proposed activities are located in OCS Federal Waters, Gulf of Mexico, approximately 38 miles from the nearest Louisiana shoreline. LLOG Exploration Offshore, L.L.C. (LLOG) will utilize existing facilities in Fourchon, Louisiana. Therefore, there should not be any anticipated or planned adverse impacts to Mississippi's coastal area.

Goal 2: To favor the preservation of the coastal wetlands and ecosystems, except where a specific alternation of specific coastal wetlands would serve a higher public interest in compliance with the public purposes of the public trust in which the
coastal wetlands are held.

The proposed activities are located in OCS Federal Waters, Gulf of Mexico, approximately 123 miles from the Mississippi coastline and 38 miles from the nearest Louisiana shoreline. LLOG will utilize existing facilities in Fourchon, Louisiana. Therefore there should not be any anticipated or planned adverse impacts to Mississippi's coastal wetlands and ecosystems.

# Goal 3: To protect, propagate and conserve the State's seafood and aquatic life in

connection with the revitalization, and conserve the State's seafood and aquatic life in connection with the revitalization of the seafloor industry of the State of Mississippi.

The proposed activities are located in OCS Federal Waters, Gulf of Mexico, approximately 123 from the Mississippi coastline and 38 miles from the nearest Louisiana shoreline. LLOG will utilize existing facilities in Fourchon, Louisiana. Therefore, there should not be any anticipated or planned adverse impacts to Mississippi's seafood and aquatic life.



# Goal 4: To conserve the air and waters of the State, and to protect, maintain and improve the quality thereof for public use, for the prorogation of wildlife, fish, and aquatic life and for domestic, agricultural, industrial, recreational, and other legitimate beneficial uses.

The activities proposed in this Plan are located in OCS Federal Waters and will use existing facilities located in Louisiana; therefore, there should be no adverse impacts to Mississippi air and water quality.

For the activities scheduled in this Plan, LLOG is proposing to discharge authorized effluents into the receiving waters of the Gulf of Mexico. Overboard discharges (i.e. drilling fluids and associated cuttings) associated with the proposed activities must be tested first for toxicity limitations as mandated by EPA's General Permit GMG290000. Other solid waste such as comminuted food will first pass through a 25 mm type mesh screen, as regulated by the US Coast Guard's Marine Pollution Research and Control Act (MARPOL) of 1987.

Activities proposed in this plan will be conducted in accordance with LLOG's approved Oil Spill Response 

# Plan.

An Air Quality Review has been performed addressing the activities proposed in this Plan and emissions for all parameters are below exemption limitations.



# Goal 5: To put to beneficial use to the fullest extent of which they are capable the water resources of the state, and to prevent the waste, unreasonable use, or
unreasonable method of use of water.

The activities proposed in this Plan are located in OCS Federal Waters and will use existing facilities located in Louisiana; therefore, there should be no adverse impacts to Mississippi water resources. Activities proposed in this Plan will be conducted in accordance with LLOG's approved Regional Oil Spill Response Plan.

## 0 BLOWOUT SCENARIO Created by: S.L. Stegeman

Last Revised: 7/12/2011 

## MC 547 "B" and "C" Page 1 of 6 

## exploratio n Confidential



## BLOWOUT SCENARIO

Pursuant with 30 CFR 250.213(g), 250.219, 250,250 and NTL 2010-N06 the following attachment provides a blowout scenario description, information regarding any oil spill, WCD results and assumptions of potential spill and additional measures taken to firstly enhance the ability to prevent a blowout and secondly to manage a blowout scenario if it occurred.

INFORMATION REQUIREMENTS

PROPOSED PROSPECT INFORMATION

Well Surface Location WD X (NAD 27) Y (NAD 27) Latitude Longitude 

## MC 547 "B" OCS-G-32334 2642 983,727' 10,328,200' 28° 26' 42.499" 89° 02' 38.134" MC 547 "C" OCS-G-32334 2642 983,874' 10,328,140' 28° 26' 41.93" 89° 02' 36.483"



## INFORMATION REQUIREMENTS

A) Blowout scenario



## The MC 547-2 `B" and MC 547-3 "C" to be drilled to potential outlined in the Geological and Geophysical Information Section of this plan utilizing a typical subsea wellhead system, conductor, surface and intermediate casing strings from a pre-existing wellbore and a MODU rig with marine riser and a subsea BOP system. A hydrocarbon influx and a well control event occurring from the objective sand is modeled with no drill pipe or obstructions in the wellbore followed by a failure of the
subsea BOP's and loss 

## of well control at the seabed. The simulated flow and worst case discharge (WCD) results for all wells are calculated and the highest WCD is used for this unrestricted blowout
scenario.

B) Estimated flow rate of the potential blowout

Category Revised EP 

## Type of Activity Drilling / Completion Ops Facility Location (area / block) MC 547 Facility Designation MODU Distance to Nearest Shoreline (miles) -40 Uncontrolled Blowout (Volume per day) 225,144 bbls (B-Loc) Type of Fluid Crude

C) Total volume and maximum duration of the potential blowout



## Duration of Flow (days) 109 days total (see Relief Well Response Estimate below) Total Volume of Spill (bbls) 24.5 MMBO based on 109 days of uncontrolled flow

D) Assumptions and calculations used in determining the worst case discharge

Omitted from Public Information Copies

E) Potential for the well to bridge over



## Mechanical failure/collapse of the borehole in a blowout scenario is influenced by several factors including in-situ stress, rock strength and fluid velocities at the sand face. Given the substantial fluid velocities inherent in the WCD, and the scenario as defined where the formation is not supported by a

1

# 0 BLOWOUT SCENARIO Created by: S.L. Stegeman

Last Revised: 7/12/2011


## MC 547 "B" and "C" Page 2 of 6 

## exploration Confidential



## cased and cemented wellbore, it is possible that the borehole may fall/collapse/bridge over within a span of a few days, significantly reducing the outflow of the rates. For this blowout scenario, no bridging is considered.

F) Likelihood for intervention to stop blowout



## The likelihood of surface intervention to stop a blowout is based on some of the following equipment specific to potential MODU's to be contracted for this well. It is reasonable to assume that the sooner you are able to respond to the initial blowout, the better likelihood there is to control and contain the event due to reduced pressures at the wellhead, less exposure of well fluids to erode and compromise the well control equipment, and less exposure of hydrocarbons to the surface to safeguard personnel and equipment in an emergency situation. This equipment includes:

• Secondary Acoustic BOP Control System — typically fitted on DP MODU's presently operating in the GOM. This system has the ability to communicate and function specific BOP controls from the surface in the event of a failure of the primary umbilical control system. This system typically can establish BOP controls from the surface acoustic system package on the rig or by deploying a second acoustic package from a separate vessel of opportunity. This system may not be included on all MODU's such as 4 th generation moored rigs. This system is typically configured to function the following:

- Blind/;shear ram close - Pipe ram close

- LMRP disconnect

• ROV Intervention BOP Control System — includes one or more ROV intervention panels mounted on the subsea BOP's located on the seabed allows a ROV utilizing standard ROV stabs to access and function the specific BOP controls. These functions will be tested at the surface as part of the required BOP stump test and selectively at the seafloor to ensure proper functionality. These function include the following (at a minimum):

- Blind/shear ram close - Pipe ram close

- LMRP disconnect

- WH disconnect

• Deadman / Autoshear function — typically fitted on DP MODU's and but to be on all MODU's operating in the GOM according to new requirements, this equipment allows for an automated pre-programmed sequence of functions to close the casing shear rams and the blind/shear rams in the event of an inadvertent or emergency disconnect of the LMRP or loss of both hydraulic and electrical supply from the surface control system.

In the event that the intervention systems for the subsea BOP's fail, LLOG will initiate call out of a secondary containment / surface intervention system supported by the Helix Well Containment Group (HWCG) of which LLOG is a member. This system incorporates a capping stack capable of being deployed from the back of a vessel of opportunity equipped with an ROV or from the Helix Q4000 DP MODU. Based on the potential integrity concerns of the well, a "cap and flow" system can be deployed which may include the Helix Producer 1 capable of handling up to 55,000 BOPD flowback. The vertical intervention work is contingent upon the condition of the blowing out well and what equipment is intact to access the wellbore for kill or containment operations. The available intervention equipment may also require modifications based on actual wellbore conditions. Standard equipment is available through the Helix Deepwater Containment System to fit the wellhead and BOP stack profiles used for the drilling of the above mentioned well.

2

## ID BLOWOUT SCENARIO Created by: S.L. Stegeman
Last Revised: 7/12/2011 

## MC 547 "B" and "C" Page 3 of 6 

## exploration Confidential



## G) Availability of rig to drill relief well, rig constraints and timing of rigs

LLOG currently has one deepwater MODU under contract (Noble Amos Runner moored semi). In the event of a blowout scenario that does not involve loss or damage to the rig such as an inadvertent disconnect of the BOP's, then the existing contracted rig may be available for drilling the relief well and vertical intervention work. If the blowout scenario involves damage to the rig or loss of the BOP's and riser, a replacement rig or rigs will be required.

With the current activity level in the GOM, 25 to 35 deepwater MODU'S are potentially available to support the relief well drilling operations. Rig share and resource sharing agreements are in place between members of the Helix Well Containment Group. The ability to negotiate and contract an appropriate rig or rigs to drill relief wells is highly probable in a short period of time. If the rig or rigs are operating, the time to properly secure the well and mobe the rig to the relief well site location is estimated to be about 14 to 21 days. Dynamically positioned (DP) MODU's would be the preferred option due to the logistical advantage versus a moored MODU which may add complications due to the mooring spread.

VESSELS OF OPPORTUNITY

Based on the water depth restrictions for the proposed locations the following "Vessels of Opportunity" are presently available for utilization for intervention and containment and relief well operations. These may include service vessels and drilling rigs capable of working in the potential water depths and may include moored vessels and dynamically positioned vessels. The specific conditions of the intervention or relief well operations will dictate the "best fit" vessel to efficiently perform the desired results based on the blowout scenario. The list included below illustrates specific option that may vary according to the actual timing / availability at the time the vessels are needed.

OPERATION SPECIFIC VESSEL OF OPPORTUNITY

Intervention and Containment • Helix 04000 (DP Semi)

• Helix Producer 1 (DP FPU)
Relief Well Drilling Rigs • Diamond Ocean Victory (Moored Semi)

• Ensco 8502 (DP Semi)

• Transocean Enterprise (DP Drillship) ROV / Multi-Purpose Service Vessels • Oceaneering (numerous DP ROV vessels)

• HOS Achiever, Iron Horse 1 and 2 (DP MPSV)

• Helix Pipe Lay Vessel (equipped w/ 6" PL — 75,000')

• Other ROV Vessels — (Chouest, HOS, Fugro, Subsea 7) Shuttle Tanker / Barge Support • OSG Ship Management

H) Measures taken to enhance ability to prevent blowout

Pursuant to BOEM-2010-034 Final Interim Rules, measures to enhance the ability to prevent or reduce the likelihood of a blowout are largely based on proper planning and communication, identification of potential hazards, training and experience of personnel, use of good oil field practices and proper equipment that is properly maintained and inspected for executing drilling operations of the proposed well or wells to be drilled.

When planning and designing the well, ample time is spent analyzing offset data, performing any needed earth modeling and identifying any potential drilling hazards or well specific conditions to

# 0 BLOWOUT SCENARIO Created by: S.L. Stegeman

Last Revised: 7/12/2011


## MC 547 "B" and "C" Page 4 of 6 

## exploratio 

## n Confidential



## safeguard the safety of the crews when well construction operations are underway. Once the design criteria and well design is established, the well design is modeled for the lifecycle of the wellbore to ensure potential failure modes are eliminated. Pursuant to BOEM-2010-0034 Interim Final Rules implemented additional considerations of a minimum of 2 independent barriers for both internal and external flow paths in addition to proper positive and negative testing of the barriers.

The proper training of crew members and awareness to identify and handle well control event is the best way prevent a blowout incident. Contractor's personnel and service personnel training requirements are verified per regulatory requirements per guidelines issued in BOEM-2010-034 Interim Final Rules. Drills are performed frequently to verify crew training and improve reaction times.

Good communication between rig personnel, office support personnel is critical to the success of the operations. Pre-spud meetings are conducted with rig crews and service providers to discuss, inform and as needed improve operations and well plans for safety and efficiency considerations. Daily meetings are conducted to discuss planning and potential hazards to ensure state of preparedness and behavior is enforced to create an informed and safe culture for the operations. Any changes in the planning and initial wellbore design is incorporated and communicated in a Management of Change (MOC) process to ensure continuity for all personnel.

Use of established good oil field practices that safeguard crews and equipment are integrated to incorporate LLOG's, the contractor and service provider policies.

Additional personnel and equipment will be used as needed to elevate awareness and provide real time monitoring of well conditions while drilling such as MWD/LWD/PWD tools used in the bottom hole assemblies. The tool configuration for each open hole section varies to optimize information gathered including the use of Formation-Pressure-While-Drilling (FPWD) tools to establish real time formation pressures and to be used to calibrates pore pressure models while drilling. Log information and pressure data is used by the drilling engineers, geologist and pore pressure engineers to maintain well control and reduced potential events such as well control events and loss circulation

events.

Mud loggers continuously monitor return drilling fluids, drill gas levels and cuttings as well as surface mud volumes and flow rates, rate of penetration and lithology/paleo to aid in understanding trends and geology being drilled. Remote monitoring of real time drilling parameters and evaluation of geologic markers and pore pressure indicators is used to identify potential well condition changes.

Proper equipment maintenance and inspection program for same to before the equipment is required. Programmed equipment inspections and maintenance will be performed to ensure the equipment operability and condition. Operations will cease as needed in order to ensure equipment and well conditions are maintained and controlled for the safety of personnel, rig and subsurface equipment
and the environment.

I) Measures to conduct effective and early intervention in the event of a blowout



## In conjunction with the LLOG Exploration's "Well Control Emergency Response Plan" and as required by NTL 2010-N06, the following is provided to demonstrate the potential time needed for performing secondary intervention and drilling of a relief well to handle potential worst case discharge for the proposed prospect. Specific plans are integrated into the Helix Well Containment Groups procures to be approved and submitted with the Application for Permit to Drill. Equipment availability, backup equipment and adaptability to the potential scenarios will 

## need to be addressed based on the initial site assessment of the seafloor conditions for intervention operations. Relief well equipment such as backup wellhead equipment and tubulars will be available in LLOG's inventory for immediate deployment as needed to address frilling the relief well(s).

4

## 0 BLOWOUT SCENARIO Created by: S.L. Stegeman
Last Revised: 7/12/2011 

## MC 547 "B" and "C" Page 5 of 6 

## exploratio 0 Confidential



## SITE SPECIFIC PROPOSED RELIEF WELL AND INTERVENTION PLANNING

No platform was considered for drilling relief wells for this location due to location, water depth and lack of appropriate platform within the area. For this reason a moored or DP MODU will be preferred / required. In the event the well can be contained, produced fluid can be plumbed into the production manifold on location or directly to the Who Dat moored floating production semi located in the southeast corner of MC 547 approximately 3 statute miles away.

Relief well sites have been initially identified to address blowout scenarios for the potential geologic targets for the proposed wells. Two relief well surface locations are proposed for the 2 Proposed Exploration Plan wells. Some of the relief well sites are common to different Proposed Exploration Plan wells. Based on actual seafloor state unforeseen at this time, the final location(s) may need to be revised. The locations have been selected based on proximity to the targets sands and potential
shallow hazards.

Proposed EP Well Proposed Relief Well X (NAD 27) Y (NAD 27)
MC 547-2 "B" OCS-G-32334 MC 503 R1 982,164' 10 329 215'
MC 503 R2 987,081' 10,327,804'
MC 547-3 "C" OCS-G-32334 MC 503 R1 982,164' 10,329,215'
MC 503 R2 987,081' 10,327,804' 

## "" indicates common relief well site to more than 1 exploration plan well

RELIEF WELL RESPONSE TIME ESTIMATE

OPERATION TIME ESTIMATE (DAYS)
IMMEDIATE RESPONSE

• safeguard personnel, render first-aid

• make initial notifications

• implement short term intervention (if possible)

• implement spill control

• develop Initial Action Plan 1

INTERIM REPSONSE

• establish Onsite Command Center and Emergency Management Team

• assess well control issues

• mobilize people and equipment (Helix DW Containment System)

• implement short term intervention and containment (it possible)

• develop Intervention Plan

• initiate relief well planning

• continue spill control measures 4

INTERVENTION AND CONTAIMENT OPERATIONS

• mobilize equipment and initiate intervention and containment operations

• perform TA operations and mobilize relief wells rig(s)

• finalize relief well plans, mobilize spud equipment, receive approvals

• continue spill control measures 14

RELIEF WELL(S) OPERATIONS

• continue intervention and containment measures

• continue spill control measures

• drill relief well (s), ranqinq operations to intersect wellbore 70

PERFORM HYDRAULIC KILL OPERATIONS! SECURE BLOWNOUT WELL

• continue intervention and containment measures

5

## 0 casy

exploration BLOWOUT SCENARIO

MC 547 "B" and "C" Created by: S.L. Stegeman
Last Revised: 7/12/2011 Page 6 of 6
Confidential



## • continue spill control measures

• perform hydraulic kill operations, monitor well, secure well 20

ESTIMATED TOTAL DAYS OF UNCONTROLLED FLOW 109
SECURE RELIELF WELL(S) / PERFORM P&A / TA OPERATIONS / DEMOBE 30

TOTAL DAYS 139

OGS-G-27277



# MC 503

LLOG
Relief Well #1

X-982163.86

V-10329214.86 - SSO2

18204.0

\ 

# Zo

13000.0 Relief Well #2

X-987081.36

Y-10327803.89

m

15000.0



### a

20130.0

MC 547 #2 

### (E-3)



# MC 547 LLOG SSot

113900.0



### OGS-G-32334



# LLOO

MISSISSIPPI CANYON 503/547

OFFStIORE LOUISIANA



## RELIEF WELL

LOCATION PLAT

GEO' J DOUGHIE DATE 92010

amo 4102 

## kale: Fool

6