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 DISCHARGE 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 MANAGEMENT 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 Exploration Offshore, LLC proposes 

to revise our currently approved Exploration Plan (Control No. N-09274) for the 

drilling, completion and testing and installation of subsea wellhead and/or 

manifold. LLOG’s initial Exploration Plan (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, completion, 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 prevention, 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 Notices 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 Operations 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:Fourchon,LA Distance to Closest Land 38 

Description of Proposed Activities (Mark all that apply) 

X Exploration drilling Development drilling 

X Well completion Installation of production platform 

X Well test flaring Installation of production facilities 

Installation of well protection structure Installation of satellite structure 

X Installation of subsea wellheads and/or manifolds Installation of lease 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 technology 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 Location “B” (Well No. 2) 12/15/2011 04/06/2012 114 

Drill, complete, and test Well Location “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 (Location B) - Well No. 2 Subsea Completion 

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

SURFACE BOTTOM HOLE 

Lease No. OCS-G-27277 

Area Name MC 

Block No. 503 

Blockline Departures N/S Departure 528’ FSL N/S Departure 

(in feet) E/W Departure 1647’ FWL E/W Departure 

Lambert X-Y X: 983,727.34 X: 

Coordinates Y: 10,328,208.22 Y: 

Latitude/ Latitude: 28° 26’ 42.581” N 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 (Location C) - Well No. 3 Subsea Completion 

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

SURFACE BOTTOM HOLE 

Lease No. OCS-G-27277 

Area Name MC 

Block No. 503 

Blockline Departures N/S Departure 460’ FSL N/S Departure 

(in feet) E/W Departure 1794’ FWL E/W Departure 

Lambert X-Y X: 983,873.67 X: 

Coordinates Y: 10,328,140.05 Y: 

Latitude/ Latitude: 28° 26’ 41.930” N 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 INFORMATION 

 
LII 0 

1647' 

FWL Surface 

io 

N 

• 13 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 tie 
X= 982,080

X= 997,920

X= 982,080X= 997,920

LLOG EXPLORATION OFFSHORE, INC.

OCS-G 27277

MC 503

MC 547

LLOG EXPLORATION OFFSHORE, INC.

OCS-G 32334

Surface

Loc C

460’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 INFORMATION 

 
GARDLINE 

--- 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.com 
GARDLINE 

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 Eaton 
GAR 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 

iv 
GARDLINE 

- 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 Plat 
GARDLINE 

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 

vi 
GARDLINE 

--.-- - 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. 

2 
GARDLINE 

- 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. 

3 
LN:N\ 09 7Z- 1

4' 

Mississippi 

11/4,t, ■-.D ■ 

f I ■ 4 "I 14 ;:).> 

. .. 4114;#46,

• 4 '4■ 4 

... 

1/ 

C41, •

Canyon 

-300' 

%, 

8. 

♦ 

■ ♦ 

::‘,......s. 

Block 503 (OCS-G27277) 

SO 

co 

• 

% 

• 

• 

% N 

I 8 I 

tcTli % 

% t 

t 0 

' v 

i 

I 

. 

Nil 

sz sosz- s ■ 

ate 

II 

s.'" 

oose. zok; 9 

\ .• 

--1 Proposed MC547-B (#2) Well 

Canyon 

e 

e 

N o,#, 1 

S 

/ 

/ / 

/ / 

/ / 

/ g 

11 

Block 547 (OCS-G18257)' 

/ 

/ i 

u) I N ■ N e 

e e 

a 

e i 

8 

N 

20•:,,.??Radio ) ot 

Oof 

 48 tRadius 

' 

Mississi 

0.. •-• 

-- 

.. 8' 

pi 

so 

. 

.. rio 

I 

... 

I 

pi• 

t■• 

Proposed 

(983,727fl 

Existing 

Block Boundary 

Anchor 

MC547-B (#2) Well Location 

E, 10,328,20811N) 

Wells 

0 3,000 

l i 

1 

Plat (MC547-B 

-270 

(#2)) 

Depth in feet below sea surface 

contoured at 25fl intervals 

Fluid expulsion site favorable for 

sessile benthic community development 

12,000 Feet 

I I I 

to seabed, 

sensitive 

6 , 

Chart scale 1" = 3,000' 

6,000 

I 

I i i 1 1 lj i I 

0 600 1,200 2,400 Meters 
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-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' 

6,000 12,000 Feet 

2,400 Meters 

28'2103 

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

° ti . 2 0 1 a ti 13 °

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 

7 
GARDLINE 

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 

?Is? 4 .1.? • ... ..- ...... .._ ,.... 

et 

• • 

\kat a 

• 

‘k - 

Mississippi Canyon Block 503 (OCS-G27277) kct:::...... 

0,330,000 

/ • 

Mississippi Canyon Block 547 (OCS-G18257) 

I e 

- ( 1 d 

i 

( 

/ 

0 I 0 / 

••• 

.01 

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 

ri 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 Meters 
CAROLINE 

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 
<IP 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 
_3000 

ts )SP ■ 

Mississippi Canyon Block 503 (OCS-G27277) 

0,330,000 

10,320,000 

• 

Mississippi Canyon Block 5476(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 


- _ . . .. ... .. .. 

JAI 

I 111 

...................... 


a i 

z-<( 
E ! 

j• it 

! a 

I 

1 

1: 1 , lig,i 

+ •- I Jir -F 

Ito 

f PIA 

ids 

, 

I hp 

i 

7 

I L I I L I 

AIM sit Mil 

I 

ea 

I 

on 

...

____ _..... -.1 

lill 

II 

• 

) 

) 

tfa0195.30) 11,7.90....M141 

)'-- 

13:3, 

4 C YH'' 

. • 

I- f 

I ' 

\ i 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 and/or unusual technology for the 

proposed operations in this plan. 

D. BONDING STATEMENT

The bond requirements for the activities and 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 “Supplemental Bonding Procedures”. 

E. OIL SPILL FINANCIAL RESPONSIBILITY (OSFR)

LLOG Exploration Offshore, L.L.C (BOEMRE Company No. 02058) will 

demonstrate oil spill financial responsibility for the facilities proposed in this 

Revised Exploration Plan according to 30 CFR Part 253, and NTL 99-N01, 

“Guidance for Oil Spill Financial Responsibility for Covered Facilities.”. 

 
Amendment 07/12/11 

APPENDIX C

GEOLOGICAL AND GEOPHYSICAL 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 GE NERATE,TREAT AND DOWNHOLE D ISPOSE OR DISCHARGE TO THE GOM 

pleasespec ifyi f theamount reported Isatotal orperwell amount 

ii 

i• 

?• 

il 

TypeofVaste 'Compos ition I Projected Amount El Dischargerate !DischargeMethod II Answeryesorno 

I dischargeoverboard No 

il 

ON preocpano mama] 

ill Dischargeoverboard No 

Discharg eoverboard No 

i 

chlorinatea nd disc ha rg e 

ove rboard No 

I 

freeoil)No 

Chlo rinateand discharge 

overboard No 

Test foroil and grease 

and dischargeoverboa rd No 

Test foroil and grease 

and dischargeoverboard. No 

Test foroil and grease 

a nd dischargeoverboard. 

Thisexcludes dear 

brinesconta ining ZincNo 

I O N I I ON I 

Dischargeoverboard I No I N O I Dischargeat mudline No Disc ha rgeove rboard No " O I 

ON VN 

Dy an Individual permit ertonere! NODESPenult General 

[

NOTE:If youwill nothavea type of waste,ente r NA intherow. 

complywith therequireme ntsof theNPDESpermit. I 8, 122 bbls/day/well 

Ilatz/naP/SIgg LO P Ilem/AB P/olgg 9 5I 

Ilem/Negg X 

2.7 bbls/hr/well 

1.8 bbls/ftwe ll 

0 to167 bbls/hr/wel l 

20 bbls/hr/well 

100 bbls/hr/we ll 

I 110/4/x4PAgg096'91 

360 bbls/hr/well 

16,350 bbls/hr/well 

[ VN 

normen x 

114 ; 

8, 0 42 bbls/well 5,361bbls/well 

0 to47,261 bbls/wel 

1 IletA/SICAOM, 

I 500 bbls/well 

0 to 1000;07----" Ila bls/well 

300 bbls/well 

0 to10, 000 bbls/well 

vN 

Sanitarywastefrom Irvingqua rters 

Miscwastefor liv ingqua rters 

Proce ssed sanitary waste from 

livingquarters 

Accumulated dra inagedue to 

rainfall 

NPDES app roved treatment fluid 

used forwell operations 

Clear brinesused forcompletion 

•• erations 

Uncontaminated spent seawater 

used forpotablewatergenera tion 

unit 

Treated freshwaterused control of 

subsea blowout preventers 

Uncontaminated seawaterused for 

ballast control 

Uncontaminated freshwaterand 

seawate roverflow / leakage 

accumuated frommac hine ry 

operations 

Excesscement slu rrya nd mixwate r 

u sed forcement ingopera tionNPDES allowed 

Uncontamina ted seawate rused for 

firecontrol system 

1 

 Uncontaminated seawa te rused for 

heat exchangeroperationsused to 

cool mac hinery 

YN 

Water-based drillingfluid 

beMinh If vela expect vOrteentional were 

EXAMPLE: Sanitarywastewater Domesticwaste Sanitarywaste 

oak? If yea,therewillbeDeckDeanne 

Dec k Dra inage 

'duct wed treetMent, eorneimfen,ortverkover? 

Well trea tment fluids Well completionfluids 

Desaliniza tionunit d ischa rge Blowout prevent fluid Ballastwater Bilgewater Excessceme ntatseafloor Fire water Cool ingwater 

duceharicot:Inkiest If enfill In fororoduaxl water. 

Produced water 

a 

pp • amnia 

L 

na t 
TABLE 2. WASTES YOU WILL TRANSPORT AND /OR DISPOSE OF ONSHORE 

pleasespecifywhethertheamount reported isatota l orperwell 

Solid andLiquid Wastes 

II Preheated generated wastetransportationWaste Disposal 

'Disposal Method I 

1 VN 

PaidAaed 

percAoeu 

VN VN 

pepAoistd 

fatadfoe 

pepAoeu 

Approved dIspo well Inj ectionor land farm 

Recycled 

wnowy 

ueowdo x' 

VN 

6750bbls/well 

VN 

VN VN 

X lb/well 4000 lbs / well 2007Is/ well 2000 bbls/well 

I liew/ alga0 l 

Composition TransportMethod Name/Locationof Facil ity 

Whigs. 0 

Belowdeckstoragetanksonoffshore Newport Environmental Services Internal olefin,estersupport vesselsInc.,Ingleside, TX 

Newpark TransferStation. 

Inverted diesel based mud NA Fourchon,LA 

Barged In25 bblscuttingboxesand / 

Internal M in,esternbased mud or liquid mud ta n ks forsupplyvesselsFN I 

oeuwpa rcho Newprk Transfe r LraAnste rStation, 

I 

Drill cuttingswetted with WBM TransferStation, generated whiledrilling NA 

Newpar

k 

pill cuttingswetted wit h SBM IlliNewpark TransferStation, 

generated whiledrilling. NA Fourchon, LA Drill cuttingswetted-with inverted IIIIMINewpark Transfer Stat ion, 

diesel based mud MENA INIFourchon,LA iu 

1-1.51VIC,paper,aluminumbarged in a storagebinARC,New Iberia,LA 

Blanchard Landfill, Golden 

Plastic,paper,aluminum Bargedinastorage binMeadows,LA 

=Barged inUSCGapproved transfertote.. 

Spent oil frommachineryWanks. ML&L Services,Fourchon, LA 

/ Newpark Transfer Stat ion, 

sFourchon,LA 

I 

L SWuarisaliclwaantser w/ 

 SB

M residue and oBralrigcleduidInm2u5d fbabniskstorinsgulob°131Yxevseassndel 

I Spent treatment and / ordamag ed Barg ed In25 bbiscutt ing boxesand / 

chemicalsused inoperationsorcuttingboxes 

IA intherow. 

Typeof Waste 

cAptmt-Lc. oymneuv-based arming (lord or mud 

Oil-baseddrilling flu id ormud Synthetic-based drillingfluidormud 

Cutt ingswetted wit h Wate r-based fluid Cutt ingswettedwit h Synthetic-based flu id Cuttingswettedwith oil-based flu ids Produced sand 

Wyatt Ifinwastes Met WeMe Ow* 

EXAMPLE: crash and debris(recylables) 

Trash and debris 

no P0511 

Wash water Chemical p roduct 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 previously 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 and approved on June 3, 2009, modified 

October 5, 2010, November 10, 2010, January 13, 2011, March 15, 2011 and last 

modification received June 8, 2011 (not currently 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 trained 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 cooperative owning an inventory of oil spill 

clean-up equipment. CGA is supported by the Marine Spill Response 

Corporation’s (MSRC), which is responsible for storing, inspecting, maintaining 

and dispatching CGA’s equipment. The 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 information 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 option 

to 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 

1 

1 

3 

2 

1 

3 

3 

1 

8 

1 

1 
O 

E 

O 

0 

E 

07• 

VJ 

0 17: 

0 

7.1 

K 

0 

0 

0 

0 

w 5 

-c) 

m 

A O pp 

N 

c ad 

4 E 

0 7. 0 

 0 la 

0 

To 

0 

e z g •o-• f 

E 0 S 

E 

2 LL 

# 

en 

co 

o C. 

a 

C 

a 

co 

0. a 

0 

FIGURE 2 —Equ ipment Response Timeto Mississippi Canyon547, We ll No.$3002 

Pe rsonsReq. CO 0 

3 t 

o 

>e 

4- e 

S 0 2 2 t o SO 

2 ti 

E 

E 

t 0 x 2 

a. 

or O or or 

a 

To (7) 

Io CD Co 

coc000to 

el el el d 

or or a 

CD 

co 

ai 

CD 

C-) 

of 

oo 

of of 

oa 

ai 

°f t o 0 

r-1 

N V V O 

-3 

S o 

N 

N N N N 

E 

x 2 o. 

0 

LL 

t 

.*- 

.E" 

8 

.c 

2 

.0 

a 

a 

41, CD 

0. 

10 

CD 0) to DI 0 

H 

1-r 

1—t 

or-. cocoa %9 Wo°0 o°o°o° 

r> In co co OINNN't 

1-1 

1-1 

_ 

N 

5 

0 

17, 

-J 

ED 

O 

CO 

0 

CO 

0 

1- 

r0 

C.) 

0 

oo 

04 

8 

F0 

0 

co 

04 

8 

1 1 1llll 

0 N 

N 

2 0>" 

p - 0 

x 0 a 9 C E 

o — 

E • 

O 

N 

z 

0 

0 (NI 

iT) N 

z 

0 

0 

N 

z 

0 

0 

N 

z 

O 

co 

O 

0 

0 

LL 

CI 

❑ 

CO 

0 

0 K 

O 

N 

°I °I h. 

N N N 

r to 

o 0 0 0 

f"1 T1 

a al m 

E E E 

o o o 

2 2 2 

4-1 c c 

11) 0 a C 0 0 

0= .0 -0rn E' .t2 I c L> c 2 0 

01a D) CD 0 0 7 0 CO 

I I U.. 0 

1 

.0 

a 

co or 03 C°N CD 91- 4- gm :a cies

1 4 

— = 

;a lc0 I— 1Z I

D 

CI 1 01 

1 

N

1

r 

1 

01 0 010 

0110 0 0,0 0 0 0 0 0 0 

Nr 1 CO •TI' 1 01 

1 

1-S-/ 

I 

01 0 N ool en in 

o 

010 

0 co 101 N ‘1" 

ea 

1 0 in In 4-- 

vdnTr 10 co co 

I I 

4-4-1 

CO 0 1 0 a 

Et E 

ala 

0, .0,1 0, pi .0 0 c 

E El E E 

E EIE E 

32 :a 

co co • co co 

N 

0 ** 0000 

11111111 
(1 O 

(9 . 

CD 

CO 

CO 3 E o 

>rn 2 o 

E 

x0 

1.1 

'V(1) 

1— 

N co O 

N 

en. 

CD 

1-1 

ti 

E 

0 

15 > 

2 

N co C') N 

crl 

• 

v"). (11 cc! Cplcl 

• In o CO N 

r r r r r (0 

D1 2 

Eg 

x 1 0. 4E 0 

C 

8 

0, 

:0 

0 0 

8 

cn 

E 

LL 

0 

ro 

2 

CD 

IL O 

I 

O CD 

Bel 

0 0 

Bel La La 

DD CD DD CD 0 

o Ol ct 

C 

O O- E c2 

O O D 

CD 

N 

El E l E EI oi o01 0 

0 1 0 1 0 1 CD 0 • 

 r (13 

8 

0 

I 

co 

P:ZIP :g' 

,, ,7. 

D

I

D

I

DDD 5 —I — I 

0 o 

3 

CO 

0 

co 

0 .5 « 0 

E 

0 

—1 

N N N N N N N 

o o .12 E ft 

• 0 

N N N N N N 

W — 

m 

2 

cn 

a 

rc 

O 

ur 

0 

N 

0 

tr- y) 

0 

N 

0 

Col 

0 

O 

co 

Lc) 

• k ca 

E 

2 

re 

111 

1 Z z 

0 0 0 0 

N 

C 

a C 

cn 

to 

11 

N N LO N N .4'

1 R ..-.. 

---' 1 

..1C ..Y .1C .he Y 

C C C C C c 

▪ 

 1 m 

m CO Of CO CO CO 1 Cr 

1— 1— I— 1— I— I— • 

aii3:13:5a a l o

c 

O .0 .0 .0 .0 .0 E 

0 0 

0 o 8 8 8 8 1- 

• -• r r I 2 

+ + + + + + 1 CO 

= ..-.. ..-... 

✓ 11.- 

,-.■ •-., 

ct.'i .- a. .-. 

.r e .-. , 

...... ..-. — 

D DDDDD1 

XIX CL CCM Cr cr U U. a a 11- IL I cr 

llllll III 
(=I 

1111111111111111 

1 0 1 1 1 1 0 001 1 0 1 1 10 1 I I C I 101 

1,1 0 1 0 1 0 10101 0 161 0 1 6 1 10N1,03 101 0 

I I 1 I 11 I I 1 3 e 

0 m 3 e . 

N 

(o N co 

N 

2 t 

279- 

2 0>t 

2 

xo 

O 0 O O O O O O O 0 O O O O O O O 0 O 

0 Co co 

N N N N N N N N N N N N N N 

IT P 

O (a N co O IN N 

a 3 

in '0 

0 

N N 0 0 0 N N 

N N N N N N N N N N N N N N N N 

"p--r—rn 

2 a a a 

0 

I0 

.0 

1 1 1 1 1 1 1111 

1 1 1 1 1 111111 

rrrr ririr r1r rirlririririr 

1 1 1 1 111111 

1 1 1 1 111111 

8 g 

E o 

x 

2 0 

E g 

0 

0 

O 

2- 

ct 

w 

0 

(E, 

= 

NI T 2 

mig 5 

, 

co co E 8 8 

2 LL 

co sW C) 

E 

C) 

O 

LakeC 

Lake C 

O 

Lake C 

Lake 

7.) 

C 

2 

u0 1a1 03 

La

o 1 71 2' 

ke 

Be 

YI O co L.+ 2 O —1 1 

0 & 

E ° 

1:t 

a. 

co C') C.) CI) In CI co O O O O 

to ID 

-a - O D 

O 

FO 

me 51 

N 0

IC 

O 

0 a 

N A 0 0 N ro N 

0 

0 

1 

° 818 00 

0 0,0 $$$ 0 0.0 r7, 

1 r—r—r—rn rn—nrn 

O O 

CI) 

rIrIw 

M1010 

CO

I

CO

I

0 

co 

co 

co 

.cr 0

0 

N N- 2 

O 

O 

E 

StagingArea:Venice 

0 

E 

0 

N

E 

C 

E 

2 

co 

2 

0 

N 

E 

ti

t g 

8 E 8 

0 0 0 

N N N 

0 0 0 

0 0 0 1— N0 0 0 

o. 

2 

1 0 

CC 
Irtti 

Tr N '4? N 

O • o ta, 

r; 

J 

N N N 

Shoreline Protection 

O O 0 O 

31— 

0 

re 

0 0 0 

0 CD 

CT) 

0 

2 Cr 

E 

0 

N I 

N 1 r 

N N N N 

N N 

Cr/ 

(e) 

N 

N 

0 

N 

Is? 

O 

al 

N 

‘r? 

O 

Cc) 

N 

N 

N 

0 

• 0 

L 0. ts, 

0 

N 

0 Tr 

IT I 

O r-- 

0 

0 

O co 

O 

0 

CO CO La La 

O 

0 

E E 

8 

0 O co 

0 

0 

8 0 8 0 

O 

i 

8 

0 

5 

O 

0 

0 

5. 55 

o 

E 

• 

• E1 0 a. 11) 41 

0 

0 

O 

a 

0 0 

.e 

.4C 

0 a. 

E 

X 

N 

M c 

L 0 

 0. 

rm-rn 

O 

E 0 

IL 

N 

O 

8 

co a. 

al 

O 

0 

= 

e0 

a 

E 4' 

a. 

0 

0 

C 

O 

B 

Q E a. 0 

0 

0 O 

O 

E

I E o o 

o 0 

I co 

I 

b 

810 

N1 0 

N 

e 0 . 0 
co a) N 

O 

N N N N N N N 

CV CO 

N CV N N N N N 

i 

O 

0 

rn 

O 8 

.c 

3 

:0 

 co 

rn cc 

0 

Belle 

z z 

ct 

z 

N N N N N N N 

tn 

O g 

E 8 x Q. 

0 

E 

LL 

0 

re 

0 

p

Y 

a 

a 

N 

co 

0 

2 

N 

2 

2 

3 

co 

th 

N

y 

C7 

t 

so 

E 

0 
APPENDIX F 

SUPPORT VESSELS AND AIRCRAFT 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 included 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 the 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 facilities 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 

 
RTBER 

xw 

RCHE 

imaiiii 

■ ar% 

, , 

.61172:214111 4( nehOMIllmmEgml ' - 

ArirlarAnNe

trai , TWIIESIongf 

_i. Prilintilaiiim 

egret ` 

Luppo, HMS MOLT 

AP43§0 koldiStg II Pftli P 

tiboltiE 11:449,./0401111 , rulE:4111 mommt I 

It

erntE 1 g 

ri. __ _ iti. 3ffirmtoomoni : .1 Ill MMI I 

itir_rizEmninariag:::11111.11101tittad Ilit I ypE 

ornik an raiwp me ver o itriliprir 1,-- 

,. . „rile kil linunnas 4 4 IP IN 9 r fl -m ug It /1' I 

?_,-..mntr montisart junk% ' ^ ' a Q4 4 i all I f

/ oo 

4 aka litilia epell L Mg 1 ranttlIIIM 

tier Mielterr mbl="4-1 EMMA IMO 1 

RIIMPII:1412451111calgmaramill 

MUM !1 

iimaimmartrr - an 6111■■■■ 1 

• titan 12n,eingliallillinr litillg4fil 

MOM 1 /44 WPM 'ORR/Clint Nis a 

Wm i,,,t tqestmonto num 111111 

haler ••;; 7 -rAVAINFMMIIIIMMI ■■ M IIVEMEMI4Iili q±rag1111•11111111t1 WE 

1741111211r171111111111111.111111 

ML.21Will own MMUMMENUME -1 . mak i IIMMUMBANIMMOSIIMI 

11111rn NNW 

nestri 

Vireo

tamisaall I I immanssalie 

/ Per taM11•15•1111111111111• a ► 

mi il mum ism 

coariangegognammunnumnummkutoranos_. . u............mmommommes...... 

to a =m •Iiii5 fissamonms ■a 151101111101111E6111111111111•111110111ilt NOM ■ 

P 91110,Alas 14111.11111 i 111111110 111111101F211111 NI 11111111111111111111111111 

ronfie• eieumum F cireembiratomen , m■n■l 1111131111111111111•MMIELIIIMMIll 11 

illIMINIIIIIIMMUM116111111•1121E111111, 

ensen seirounnii 

IIMMUMEM MINIMMOMM 

MIMMIUMEMMIMEMM NMOMMEMEOMA EMLAMOD 

INIS 

MOMMUMEMMEIIMMM ■■IH■■■MIUMI■M■■INI MEMEMMUMBNOMMETAMMCOMMICAMMI immummesemossommaxemmemmmarnpummumemermimm I 

Nearest Shore Approx: 38 miles 

Shorebase: Fourchon, Louisiana 
APPENDIX H 

AIR EMISSIONS 

PUBLIC INFORMATION

 

MMS FORM MM S-138 (Decembe r 2008 - Supe rsedesall previou sversionsof form MMS- 138 which maynotbeused). Page1 of8 
Fue l UsageConversionFactors 

EMISSIONS FACTORS 

co 

0 

N 

a Main FORM MMS-138 (Decembe r 2008 - Supersedesall previou sversionsof form MMS- 138 which maynot beused). 

E 

a 

a 

-75; a) L 

C') 

CO O 

co 

a 

TD 

LL 

LL 

TD 

a) 

0 

0 

tC 

0 -o 

a> 

2 

a 

a_ 

al_VD 

P 96/0 t 

96/01 

II 96/0 1. 

96/01 96/0 96/0 1 

II 86/6 

86/L 

II 16/6 

86/6 

€6n 

66/3L 

1661 

'd3 E1 

1 I.- 'R 217 cIV 

AP423.2- 1 

AP423.2- 1 

31,dt, 

AP423.3- 1 AP423.4- 1 

AP421.3- 12, 14 

v' e-tr t 

AP4211.5- 1 

AP421. 3-1 & 1.3-3 

E&P Fo rum 

API Study 1 

La.DEC) 

00 

88'0 

9' 1. 9'8 17'a 

1.3'0 

178 

9'888 

1.3'0 

00A 

1.0' 0 

£10 ZEO 171.' 0 

I:1 

I Ce' 0 

800' 0 

S'S 

8'09 

I 1.0'0 

sot 

0.0005 I 

9' 9 

VS00'0 

XON 

C' 

6'0 1 8' 11 

0 t Pt 

1.1 

178' 0 

00 1. 

17' LL 

C \ I 

x0S 

0.00247 0.00185 0.00185 0.00185 

894' 1. 89-17' 

Z17' 3 

C69' 0 S69' 0 I C8'9 

LAld 

ZED 

1780' 0 

310 

units 

ay-dtusLue ill-dli/SW6 at{-dwsw6 iii-duisw6 .11.1-dll/SW6 iii-dq/sLub 

icicvsql 

lbs/mmscf lbs/mmscf 

nwscH icniscii 

rdwooptusgi 

joswuusgi 

I lowsgi 

Equipment/EmissionFactors 

IING Turbines IING 2-cycle lean IING 4-cycle lean IING 4-cyclerich °Diesel Recip.< 600 hp. Wiese! Recip.>600 hp. IlDiesel Boiler IING Heaters/Boilers/Burners IING Flares 

IlLiquid Flaring 

Tank Vapors 

IlFugitives IIGlycol Dehydrator Vent !Pas Venting 
EMISSIONS CALCULATIONS 1ST YEAR 

SNEINT3E1 

DdII,Complete & Test 

ESTIMATED TONS 

i-. o .r. 8 8 8 8 8 8 S R 8 6 6 6 6 6 o 6 

8888 

6666 

8 8 

o o 

LS' OE 

ELSZITBE 

8, 8 8 8 8 8 8 6-, CO 

cn 6 6 6 6 6 6 o 6 

: 

00' 0 

00' 0 

00' 0 00' 0 

8 8 0 0 

OSO 

OVSSIZ 

a 't 8 8 8 8 8 8 R S 

• 8 6 6 6 6 6 .- ni 6 

8888 

6 6 6 6 

8 8 

00 

Otte I 

0E99E 1- 

8 8 8 8 8 8 8 N 

1--:6 6 6 6 6 6 6 6 

: 8 888 

6666 

00'

000 

0 

WSI 

OESSZ 

8 8 8 8 8 8 18, ra 8 

O 6 6 6 6 6 o 6 6 1 8888 6666 

00'0 

OES9Z1- 

8 a8 8 8 8 8 

2. •`2. 8 • 0 6 6 6 6 6 `: 'I" RI 

ovo oao oao Quo 6 000 

 V? 

CONTACT _I PHONE I 

1 'cl)8 8 8 8 8 M 2 8 

..9.. 6 6 6 6 6 ri 

8 8 8 8 

6 6 6 6 

Olt 000 

OVEZ 

8 8 8 8 8 22 2 

@ 6 6 6 6 6 g ,9, g 

1 

00' 000' 000"000' 0 

2 8 

R a 

1.0'098 

28 8 8 8 8 8 8 2 

66 6 6 6 6 05 co c'i CD 

8888 

0000 

00' 0 

91' 

LOC81. 

1 ?Z, 8 8 8 8 8 8 8 8 00000- 1-N 

8888 

0000 

Sc. , 

06'8Z 

I 113M 

Locallon B (Well No.002)t 

RUN TIME 

CA 

).1. 4 '' 0000a act a 

CI 

coocao 

0 

o0 

g n0000030,9.;_i 

i 

0000 Oo 

vitiosind 

NA 

ACT.FUEL 

°MOS 

0/1V0 

0 2 8 8 8 it c,i 8 8 8 8 • 4 • o 8 666 6 "el IA g NNet 

8 8 8 8 

6666 

MEGIE• 

33 131 1 I 

ccs.e-dftrt 

MAX.FUEL 

U

HW4OS 

H/1V0 

WN 

Mn8 E L07 . 

r 

 . IL000 Or oj r-- 

c•11 

o 0 R 0000 

0 

I moo-le I 

503/547 

RATING 

dH dH 

a 

E 

8 et00000.,_,_8 8 8 N 

03 NN et 

2 

2 

0000 

0 

DdO 

113911 

Mississippi Canyon 

EQUIPMENT 

flotsam 1190 VW 

soul6u3 plasm 

PRIME MOVER>600hp diesel PRIME MOVE R>600hp diesel PRIME MOVER>600hpdiesel PRIME MOVER>600hpdiesel BURNER diesel AUXILIARY EQUIP<600hp diesel 

VESSELS>600hpdiesel(crew) 

VESSELS>600hpdiesel(supply) VESSELS>600hp diesel(tugs) DERRICK BARGE diesel MATERIAL TUG diesel VESSELS>600hp diesel(crew) 

VESSELS>600hpdiesel(supply) 

'06 -NNV1 111 [OIL BURN 

GAS ARE FLYEAR TOTAL 

DISTANCEFROM LAND IN 

MILES 

I 0' 86 

I COMPANY I ILLOG Exploranon Oils 

OPERATIONS 

0 

 O FACILITY 

INSTALLATION 

DRILLING 

WELL TEST 

EXEMPTION 

CALCULATION 

co 

"6" 

co a

y 

E 

 E 

2 

2 •a 

e, 

E 

0 

2 

2 

tt 

0 !

LL 

I 
EMISSIONS CALCULATIONS 2ND YEAR 

I WELL 1 CONTACT PHONE 1 REMARKS 

8 o o 8 o o cv c-- a' • oo oocor-co 

666664uica 

co 

00'000 

0 

00' 0 000 00'°o

0 

I SETAE 

38429.79 

I 30A 

.q922222N2 0 00000cocno 

,0000000..- 

00' 0 

00' 0 00' 0 000 

00'0 00' 0 00'0 

EZ' LS 

1265.40 

SON 

co 

LO or-coo 

tiEE880.-tin 

to 00000,,,,Q, 

00' 0 00' 0 00' 0 00'0 

00' 0 

00' 0 

1 

139'LOtt green 

NOS 

N' g00000NCOn c,,q9000zotn •-00666oi6th 

N 

00'000 

0 

00' 0

00' 0 

00' 0 00' 0 

OGaz 

041921- 

Nd I 

In 0 0 0 0 0 N I.- 10 

"t00 0000N70 

,0000000,- 

0000 

00 

00' 0 00'0 

00'0 

99'69 

OVS921. 

oNion 'C'SNWINKMa Rtriyon I985801 -43ooI 

MAXIMUM POUNDSPER HOUR 

I 03 

,0 v) 00000a'aPa' 

th0000c,

11`-a1 

co66666

-,_- &,' 

00' 0 00' 0 00' 0 00'0 00' 0 000 

Seth 

30A 

7 

a' 0 0 0 0 0 CO CO LO 

00000 0LP 0 

 200000,-,-ei 

00'OTO 

0 

00'OTO 

0 

00' 0 00' 0 

08' 52 

SON 

COW°. '1'888E822r.: 

66666a'a'S 

co 66,_ 

00 0 00' 0 00' 0 00'0 

00' 0 

00'0 

LI.Tte 

I Nos I 

caoccoccocom°:' anaaCaCca 0 N-N,...;° 1 °0°0666- ' co 

00' 0 00' 0 00' 0 OTO 00' 0 00'0 

Mtn. 

Nd I 

a> 0 0000 ococo 

0 0 0 00 ° 't 't ° 

th6 t 0000--N 

00' 0 00' 0 00' 0 00'0 

00'0 

69172 

SAVO 

000 

8000 0000 E- 00000 - 

N.-..--..- 600 o888 

00' 0 00' 0 

0 0 

00 

9000 00 ° g -g00 0 00°- 

'io66 6c6ON' oc .,_ 

00' 0 00' 0 

0 0 0 

oo 

WHOilY14 

N/A 

atdos OFTWO 

Cl=617 

m 

0 

NOIL.t 

c‘jo o ne,co 

0000 Cvd 

6 6 6 o c. ; ? c4 1 

cd 3 

NNNI00'

OTO 

0 

000 000 

3SVE1 

s'272nj MAX.FUEL 

GALMR 

SCF/HR 

tlWJOS 

Meng '4".ve.., tO000 in • n 

N 

- 

E 5 8 

, 

0000 

UH/A0S 

)13018 

503M47 

RATING 

dH dH 

IC 

8 o o o 

c-Soc0000°°R, 

CO , NNLPM 

0000 

0 

Ode 

931:19 

missistappi Canyon 

EQUIPMENT 

Diesel Engines 

Net. Gas Engine - RIMEMOVER>600hpdiesel 

PRIMEMOVER>600hpdiesel PRIME MOVER>600hpdiesel PRIMEMOVER>600hpdiesel 

BU RNER d iesel AUXILIARY EOUIP<600hpdiesel VESSELS>600hpdiesel(crew) VESSELS>600hpdiesel(supply) VESSELS>600hp diesel(tugs) DERRICK BARGE d iesel M ATERIAL TUG diesel 

VESSELS>600hp diesel(crew) VESSELS>600hpdiesel(supply) -)11)1V1 33 ' 161 

OIL BURN GAS FLARE 

1W101E1113/1 

DISTANCE FROM LAND IN 

MILES 

O'BE 

COMPANY I LLOO ExplorationOffal' 

OPERATIONS 

0 

a 

.T.J _■ E 0 

FACILITY INSTALLATION DRILLING 

WELL TEST 

UO3 

EXEMPTION 

CALCULATION 

z z

C B

q 

E 

8 

a 

0) 

0 

LL 

ej 
EMISSIONS CALCULATIONS 3RD YEAR 

wELLI I CONTACT I PHONE I REMARKS 

000000000 0 °299 0000 

 660006666 

1 00' 0 , 

00' 0 00' 0 00' 0 

I 00' 0 

00'0 

00' 0 00'0 

00A 

000a00000 

000000000 

660266666 

oao o 

gogo 

oao2 

00'0 00' 0 000 00'0 00' 0 

xON 

00000o 8880 0 000 0 

666606(56o 

00' 0 00' 0 

00' 0 00'0 

00'DUO 

0 

00' 0 

00' 0 

KOs 1 

000a00000 0 9 000 °°°° 

606666666 

000 0 

929 0 

 0002 

00 0 00'0 00'0 00' 0 

Wd 

000000000 

000g0000 o 

660006666 

00' 0 00' 0 00' 0 00'0 000 

00' 0 00'0 

catkin 'C' (WellINeklaRuiyon 1965-sal-tsoo 

MAXIMUM POU NDS PER HOU R 

I 00 

000000000 

0000°0 °22 

666666600 

0000 

29 0 0 0066 

00' 0 00'0 00' 0 

00A 

000000000 

92222 0000 

 000006666 

00' 0 00' 0 00'000 

0 

00' 0 00'0 DOD 

xON 

000000000 000 °°°222 

666666000 

0000 2 00 ° 

0666 

00' 0 00'0 00' 0 

KGs I 

000000000 

oog000000 

000666666 

00'ODO 

0 

00' 0 00'0 00'

000 

0 

00'0 

Wd 

000000000 000 ° 0 °999 

666666000 

(Doc° 2 000 

 0666 

00'0 

00' 0 

SAW] I 

a 000000ao 0000 

0 

°a 

OMNI 

000000000 coo° 

0 

oo 

I PLATFORM I 

Nos 

ACT.FUEL 

0/d OS 

0/1Y0 

73=7 

0000 0000 

O229 000 ° dodo 6666 

0ODO ODO 

0' 0 

000 

COUNT 

EASE 

0CS-G 27277A 

MAX. FUEL 

1:114d3S 

thinvo 

0 0 0 0 0 0 0 0 

0000 0000 

1:1H/d3S 

0000 

LIH/d3S 

0 

I BLOCK I 

503/547 

RATING 

dH dH 

CC 

7 p_000000noo 

0 

2 

2 

0000 

0 

OdEl 

0 

Mississippi Canyon 

EQUIPME NT 

Diesel Engines 

Net Gas Engines 

;11. 1:; 144:1!1:47 - :■ -• 

PRIME MOVER>6001pdiesel PRIMEMOVER>600hpdiesel PRIME MOVER>600hp diesel PRIME MOVER>600hpdiesel 

BURNER diesel 

AUXILIARY EQUIP<600hpdiesel VESSELS>600hpdiesel(crew) VESSELS>600hpdiesel(supply) VESSELS>600hpdiesel(tugs) 

DERRICK BARGE diesel 

MATERIALTUG diesel VESSFI S>R0Ohn din4/41 /00454 1 -NNVI 

OIL BURN GASFLARE YEAR TOTAL 

DISTANCEFROM LAND IN 

MILES 

00 

ANV41103 I ILLOO Exploration011shl 

OPERATIONS 

0 Z 

=1 

cc 0 

FACILITY INSTALLATION DRILLING 

WELL TEST 

EXEMPTION 

CALCULATION 

co 

O 

0 

2 :2 

2 

2 

8 

E 

co 

co 

ea 

2 

0 

LL 
OD 

aa 

O 

r 

O 

CD CO CD CD CD CD 

CR CD CR C) 0 0 

CD Ci C) C 0 CD 

O 

to cto N CO 0) CD 

0 

 C4 

CI CD CD CD C) 

CV C4 CV 01 CV CO 

O 

O (0 

O 

P. a) 11) 000 O00 CD CD 

(NI0 C) CD 0 0 CR C) CR 

ty9 elt•• Ci C) C) 6 C) CD CD CD 

C°CD C) CD 0 CD C) 0 CD • CD 0 C) C) C) CR CD CD 

e. n7 CD CD CD Ci C) C) 6 

CD 

et 

OD 

OA 

PLATFORM 

0 

ch 

0 

gl 

CD 

to 

O 

Ul 

CD CD CD tD C) 

CR CR 0 o CR 0 • C) Ci 6 C) CD 

C) 

et. 

11) 

CV ✓- 

0 

t•••• 

ad 

O 

47? N CCI 

C 

C 

 C 

0 

O 

Ut 

r 

1.0 

co 

a 

co 

Ut 

.o 

O 3 

CCI 

O O 

O 

O 

O 

0 

O O 

O 

O 

0 

O 

O 

O O O O O O O 

O 

O 

O 

O 

O 

O O 

0 

R 

OD 

C4 

e- 

›- 

CC 

2 

D 

0) 

O a) Ol N "6 MMS FORM MMS-138 (December 2008 - Supersedesall previousversionsof form MMS-138 which maynot beused). 
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 thgeneration 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 

\ 

13000.0 Zo 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