UNITED STATES GOVERNMENT MEMORANDUM

To: Public Information (MS 5030)

Plans Section, Office of Field 

Operations (MS 5231)

Public Information copy of Exploration Plan

Control # - N-09697

Type - Initial Exploration Plan

Lease(s) - OCS-G34455 Block - 692 Mississippi Canyon Area

Operator - Murphy Exploration & Production Company - USA

Drilling Wells Locations A, B, and C

Not Found

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.

Ulunma Nwokeafor

Plan Coordinator

Description -

Rig Type -

Subject:

From:

June 25, 2013
Public Information

16290 Katy Freeway, Suite 110 

Houston, Texas 77094 

Robert Lanza 

Robert_Lanza@murphyoilcorp.com

INITIAL EXPLORATION PLAN 

LEASE OCS-G 34455 

MISSISSIPPI CANYON BLOCK 692 

(SEA EAGLE PROSPECT) 

PREPARED BY: 

R.E.M. Solutions, Inc. 

15021 Katy Freeway, Suite 620 

Houston, Texas 77094 

281.492.8562 (Phone) 

281.492.6117 (Fax) 

christine@remsolutionsinc.com 

DATED: 

February 14, 2013 

Date of 

Submittals & 

Amendments 

Description 

2/14/2013 Initial submittal of Initial Exploration Plan 

2/25/2013 BOEM’s email request for additional information 

3/1/2013 Submittal of BOEM requested information (Complete copies with CD’s) 

3/21/2013 Submittal of revised activity dates (Plans Form and AQR) 

3/26/2013 Submittal of revised Waste and Discharge Tables 

4/5/2013 Submittal of revised Waste and Discharge Tables 

4/26/2013 Submittal of revised Waste & Discharge Tables 

5/2/2013 Final Submittal of Initial Exploration Plan 

6/10/2013 Revised Oil Spill Information Section 
Plan Contents 

(30 CFR Part 550.211 and 550.241) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 1

A. Plan Contents 

Lease OCS-G 34455, Mississippi Canyon Block 692 was acquired by Murphy Exploration & 

Production Company and Ecopetrol American Inc. at the Central Gulf of Mexico Lease Sale No. 

222 held on June 20, 2012. The lease was issued with an effective date of November 1, 2012 and a 

primary term ending date of October 30, 2022. 

The current lease operator and ownership are as follows: 

Area/Block 

Lease No. 

Operator Ownership 

Mississippi Canyon Block 692 

Lease OCS-G 34455 

Murphy Exploration & Production 

Company 

Ecopetrol America Inc.

Murphy Exploration & Production 

Company 

Murphy Exploration & Production Company proposes for the drilling of three subsea well locations 

in Mississippi Canyon Block 692. The wells will be drilled with the Discoverer Deep Seas drillship 

(utilizing subsea BOP’s). 

B. Location 

Included are the following attachments: 

Attachment A: Form BOEM 137 “OCS Plan Information Form” 

Attachment B: Well Location Plat 

Attachment C: Bathymetry Map (proposed surface location disturbance areas) 

C. Safety and Pollution Prevention Features 

Safety of personnel and protection of the environment during the proposed operations is of primary 

concern with Murphy, and mandates regulatory compliance with the contractors and vendors 

associated with the proposed operations as follows: 

Bureau of Ocean Energy Management (BOEM) and the Bureau of Safety and 

Environmental Enforcement (BSEE) mandates that the operations in this Plan comply with well 

control, pollution prevention, construction and personnel safety as described in Title 30 CFR Part 

250, Subparts C, D, E, O and S; and as further clarified by Notices to Lessees. 

The agencies cited above conducts periodic announced and unannounced onsite inspections of 

offshore facilities to confirm operators are complying with lease stipulations, operating regulations, 

approved plans, and other conditions; as well as to assure safety and pollution prevention 

requirements are being met. The National Potential Incident of Noncompliance (PINC) List serves 

as the baseline for these inspections. 
Plan Contents 

(30 CFR Part 550.211 and 550.241) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 2

U. S. Coast Guard regulations contained in Title 33 CFR mandate the appropriate life rafts, life 

jackets, ring buoys, etc., be maintained on the facility at all times. 

U. S. Environmental Protection Agency regulations contained in the NPDES General Permit 

GMG290000 mandate that supervisory and certain designated personnel on-board the facility be 

familiar with the effluent limitations and guidelines for overboard discharges into the receiving 

waters. 

D. Storage Tanks and Vessels 

The following table details the storage tanks and/or production vessels that will store oil (capacity 

greater than 25 bbls. or more) and be used to support the proposed activities (MODU, barges, 

platform, etc.): 

Type of 

Storage Tank 

Type of Facility Tank Capacity

(bbls) 

Number of 

Tanks 

Total Capacity 

(bbls) 

Fluid Gravity 

(API) 

Fuel Oil Drillship 25,000 1 25,000 No. 2 (Diesel) 

 

E. Pollution Prevention Measures 

Murphy does not propose any additional safety, pollution prevention, or early spill detection 

measures beyond those required by 30 CFR Part 550. 

F. Additional Measures 

Murphy does not propose any additional safety, pollution prevention, or early spill detection 

measures beyond those required by 30 CFR Part 550. 
General Information 

(30 CFR Part 550.213 and 550.243) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 3

A. Application and Permits 

The following Federal/State applications will be submitted for the activities provided for in this Plan 

(exclusive of BOEM/BSEE 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 

Murphy plans to use the following drilling fluids for the operations proposed under this Plan: 

Proposed 

Well Location 

Type of Drilling Fluid Estimated volume of 

Drilling Fluid to be 

used Per Well 

A – C Water-based (seawater, freshwater, barite) 

Synthetic-based (internal, olefin, ester) 

15,000 bbls 

12,000 bbls 

C. New or Unusual Technology 

Murphy does not propose using any new and/or unusual technology for the operations proposed in 

this Plan. 

D. Bonding Statement 

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

Areawide Development bond, furnished and maintained according to 30 CFR Part 556, Subpart I; 

NTL No. 2000-G16, “Guidelines for General Lease Surety Bonds;” and a current BOEM-approved 

deferment from providing additional security under 30 CFR 556.53(d) and National NTL No. 2008-

N07 “Supplemental Bonding Procedures.” If, any point, Murphy Exploration & Production 

Company no longer qualifies for a supplemental bonding deferment, Murphy Exploration & 

Production Company will either provide the required additional security or a third party guarantee 

within 60 days after such disqualification. 

E. Oil Spill Financial Responsibility (OSFR) 

Murphy Exploration & Production Company (BOEM Operator No. 02647) will demonstrate oil 

spill financial responsibility for the facilities proposed in this EP according to 30 CFR Part 553, and 

NTL 2008-N05, “Guidelines for Oil Spill Financial Responsibility for Covered Facilities.” 
General Information 

(30 CFR Part 550.213 and 550.243) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 4

F. Deepwater Well Control Statement 

Murphy Exploration & Production Company (BOEM Operator No. 02647) has the financial 

capability to drill a relief well and conduct other emergency well control operations. 

G. Blowout Scenario 

Murphy will drill to the objective sands outlined in Geological and Geophysical Section of this Plan 

utilizing a typical structural, conductor, surface and production casing program. If mandated by 

wellbore conditions, an intermediate casing string will be set prior to drilling through the objective 

sand. In the event of a blowout during the course of drilling open hole in the objective sands, 

Murphy anticipates a rate of 296,918 STBO/D with an anticipated gravity of 37°. The wellbore 

would most likely not bridge over. Murphy would immediately activate its Regional Oil Spill 

Response Plan and Spill Management Team to initiate potential recovery of liquid hydrocarbons on 

the receiving water and review potential well intervention options. In the event a relief well is 

initiated, Murphy does not anticipate any delays in acquiring a rig to conduct the proposed 

operations. Dependent upon the interval the well was drilled to, and potential interval for bridging 

over and surface intervention; if required, it could take at least 76 days to mobilize a equipment 

and/or a rig to the field and drill the relief well. Based on well intervention outlined in the potential 

worse-case discharge scenarios (See Attachment O), the potential for drilling a relief well and a rig 

not being immediately available would be a total of 76 days and a potential total of 22,565,768 

barrels during that time span. 
Geological and Geophysical Information 

(30 CFR Part 550.214 and 550.244) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 5

A. Geological Description 

Included as Attachment D are the geological targets and a narrative of trapping features proposed 

in this Plan. 

B. Structure Contour Maps 

Included as Attachment E are current structure maps (depth base and expressed in feet subsea) 

depicting the entire lease coverage area; drawn on top of the prospective hydrocarbon sands. The 

maps depict each proposed bottom hole location and applicable geological cross section. 

C. Interpreted Seismic Lines 

Included as Attachment F is a copy of the migrated and annotated (shot points, time lines, well 

paths) deep seismic line within 500 feet of the surface locations being proposed in the Plan. 

D. Geological Structure Cross-Sections 

An interpreted geological cross section depicting the proposed well locations and depth of the 

proposed wells is included as Attachment G. Such cross section corresponds to each seismic line 

being submitted. 

E. Shallow Hazards Report 

Geoscience Earth & Marine Services conducted a geologic and stratigraphic assessment of 

Mississippi Canyon Block 692 on behalf of Murphy Exploration & Production Company - USA. 

The purpose of the survey was to evaluate geologic conditions and inspect for potential hazards or 

constraints to lease development. 

Four (4) copies of these reports are being submitted to the Bureau of Ocean Energy Management 

under separate cover. 

F. Shallow Hazards Assessment 

Utilizing the 3D deep seismic exploration data a shallow hazards analysis was prepared for the 

proposed surface locations, evaluating seafloor and subsurface geologic and manmade features and 

conditions, and is included as Attachment H. 

G. High Resolution Seismic Lines 

Utilizing the 3D deep seismic exploration data the survey data lines for each surface location 

disturbance proposed in this Plan is included with Attachment H.
Geological and Geophysical Information 

(30 CFR Part 550.214 and 550.244) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 6

H. Stratigraphic Column 

A generalized biostratigraphic/lithostratigraphic column from the seafloor to the total depth of the 

proposed wells is included as Attachment I. 

I. Time vs. Depth Tables 

A time versus depth table is included as Attachment J. 
Hydrogen Sulfide (H2S) Information 

(30 CFR Part 550.215 and 550.245) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 7

A. Concentration 

Murphy does not anticipate encountering H2S while conducting the proposed exploratory 

operations provided for under this Plan. 

B. Classification 

In accordance with Title 30 CFR 250.490(c), Murphy requests that Mississippi Canyon Block 692 be 

classified by the Bureau of Safety and Environmental Enforcement Regional Supervisor as an area 

where the absence of hydrogen sulfide has been confirmed based on the following correlative well 

which was drilled to the stratigraphic equivalent of the wells proposed in this Plan: 

Lease Area/Block Well No. H2S Concentration 

OCS-G 16645 MC 737 001 0% 

 

C. H2S Contingency Plan 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 

D. Modeling Report 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 
Biological, Physical and Socioeconomic Information 

(30 CFR Part 550.216 and 550.247) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 8

A. Chemosynthetic Communities Report 

The proposed seafloor disturbing activities vary in water depths from 5718 feet to 6193 feet. 

MAPS 

Submitted under separate cover are the maps prepared using high resolution seismic information 

and/or 3-D seismic data to depict bathymetry, seafloor and shallow geological features, surface 

location of each proposed well and platform, positions of anchors and chains relative to the 

proposed operations, and a radius circle of 500 feet around each such location. 

ANALYSIS 

Submitted under separate cover is the analysis of seafloor features and areas that could be disturbed 

by the activities proposed in this Plan. 

Features or areas that could support high-density chemosynthetic communities are not located 

within 2000 feet of each proposed muds and cuttings discharge location. 

Murphy will be utilizing a dynamically positioned drillship; therefore; no features or areas that could 

support high-density chemosynthetic communities would be affected by seafloor disturbances 

resulting from the use of anchors. 

B. Topographic Features Map 

BOEM and the National Marine Fisheries Service (NMFS) have entered into a programmatic 

consultation agreement for Essential Fish Habitat that requires that no bottom disturbing activities 

(including rig placement, and rig or construction base use of anchors, chains, cables, and wire ropes) 

within 305 meters (1000 feet) of a “No-Activity Zone” of a topographic feature. 

If such proposed bottom disturbing activities are within 1000 feet of a no activity zone, the BOEM 

is required to consult with the NMFS. 

The activities proposed in this Plan are not affected by a topographic feature. 

C. Topographic Features Statement (Shunting) 

The activities proposed in this Plan are not affected by a topographic feature; therefore, Murphy is 

not required to shunt drill cuttings and drill fluids. 
Biological, Physical and Socioeconomic Information 

(30 CFR Part 550.216 and 550.247) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 9

D. Live Bottoms (Pinnacle Trend) Map 

Certain leases are located in areas characterized by the existence of live bottoms. Live bottom 

(Pinnacle trend features) are small, isolated, low to moderate relief carbonate reefal features or 

outcrops of unknown origin or hard substrates exposed by erosion that provide surface area for the 

growth of sessile invertebrates and attract large number of fish. Known features occur in an area of 

topographic relief in the northeastern portion of the western Gulf of Mexico. These leases contain a 

Live Bottom Stipulation to ensure that impacts from nearby oil and gas activities on these live 

bottom areas are mitigated to the greatest extent possible. 

For each affected lease, the Live Bottom Stipulation requires that you prepare a live bottom survey 

report containing a bathymetry map prepared by using remote sensing techniques. This report must 

be submitted to the BOEM OCS Region before you may conduct any drilling activities or install any 

structure, including lease term pipelines in accordance with NTL 2009-G39. 

Mississippi Canyon Block 692 is not located within the vicinity of a proposed live bottom (Pinnacle 

trend) area. 

E. Live Bottoms (Low Relief) Map 

Certain leases are located in areas characterized by the existence of live bottoms. Live bottom (Low 

relief features) are seagrass communities; those areas that contain biological assemblages consisting 

of sessile invertebrates living upon and attached to naturally occurring hard or rocky formations with 

rough, broken, or smooth topography; and areas where a hard substrate and vertical relief may favor 

the accumulation of turtles, fishes or other fauna. These features occur in the Eastern Planning 

Area of the Gulf of Mexico. 

Mississippi Canyon Block 692 is not located within the vicinity of a proposed live bottom (Low 

Relief) area. 

F. Potentially Sensitive Biological Features 

Oil and gas operations and transportation activities in the vicinity of potentially sensitive biological 

features may cause deleterious impacts to the sessile and pelagic communities associated with those 

habitats. Adverse impacts to the communities could be caused by mechanical damage from drilling 

rigs, platforms, pipelines and anchor employment. 

Mississippi Canyon Block 692 is not located within the vicinity of a proposed sensitive biological 

feature area. 
Biological, Physical and Socioeconomic Information 

(30 CFR Part 550.216 and 550.247) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 10

G. Remotely Operated Vehicle (ROV) Monitoring Survey Plan 

Pursuant to NTL No. 2008-G06, operators may be required to conduct remote operated vehicle 

(ROV) surveys during pre-spudding and post-drilling operations for the purpose of biological and 

physical observations. 

As indicated on BOEM’s website, Mississippi Canyon Block 692 are located within Grid No. 16 and 

indicates sufficient ROV data is available. 

H. Threatened or Endangered Species, Critical Habitat, and 

Marine Mammal Information 

The Bureau of Ocean Energy Management revised Title 30 CFR Part 550, Subpart B to require 

lessees/operators to address the federally listed species with designated critical habitat as well as 

marine mammals which may be impacted by the proposed activities addressed under this Plan. 

Attachment K outlines the listed species under the jurisdiction of NOAA fisheries are known to 

occur in the Gulf of Mexico which may be affected by the proposed action. 

Murphy does not anticipate that the proposed activities will occur in the presence of federally listed 

threatened or endangered species and critical habitat designated under the ESA and marine 

mammals protected under the MMPA based on the information is the referenced Attachment. 

The proposed activities in Mississippi Canyon Block 692 are not located in the presence of federally 

listed threatened or endangered species and critical habitat designated under the ESA and marine 

mammals protected under the MMPA. 

 

I. Archaeological Report 

In accordance with NTL’s 2011-JOINT-G01 and 2005-G07, Mississippi Canyon Block 692 is 

located within an area requiring a 300-meter spacing survey. 

This requirement provides protection of prehistoric and historic archaeological resources by 

requiring remote sensing surveys in areas designated to have a high probability for archaeological 

resources. 

As per NTL’s 2011-JOINT-G01 and 2005-G07, this survey was conducted and is being submitted 

under separate cover to the Bureau of Ocean Energy Management. 

J. Air and Water Quality Information 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 
Biological, Physical and Socioeconomic Information 

(30 CFR Part 550.216 and 550.247) 

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 11

K. Socioeconomic Information 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 
Waste and Discharge Information 

(30 CFR Part 550.217 and 550.248)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 12

A. Projected Generated Wastes 

Included as Attachment L is a listing of the projected generated wastes associated with the activities 

provided for in this Plan, detailing the type of waste, composition and projected amount. 

Murphy does not propose any treating, storing, or downhole disposal of these wastes at the 

proposed wells/MODU. 

B. Projected Ocean Discharges 

Included as Attachment L is a listing of the projected ocean discharges associated with the activities 

provided for in this Plan, detailing the type of waste, total amount to be discharged, discharge rate 

and method. 

C. Modeling Report 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 
Air Emissions Information 

(30 CFR Part 550.218 and 550.249)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 13

The primary air pollutants associated with OCS exploration activities are: 

 Carbon Monoxide 

 Particulate Matter 

 Sulphur Oxides 

 Nitrogen Oxides 

 Volatile Organic Compounds 

These offshore air emissions result mainly from the drilling rig operations, helicopters, and support 

vessels. These emissions occur mainly from combustion or burning of fuels and natural gas and 

from venting or evaporation of hydrocarbons. The combustion of fuels occurs primarily on dieselpowered generators, pumps or motors and from lighter fuel motors. Other air emissions can result 

from catastrophic events such as oil spills or blowouts. 

A. Emissions Worksheets and Screening Questions 

The Projected Air Quality Emissions Report (Form BOEM-138) addresses the proposed drilling 

operations utilizing a typical dynamically positioned drillship with related support vessel information. 

As evidenced by Attachment M were completed based on the operations being more than 90% if 

the calculated complex total. 

B. Emissions Reduction Measures 

The projected air emissions are within the exemption level; therefore, no emission reduction 

measures are being proposed. 

C. Verification of Nondefault Emissions Factors 

Murphy has elected to use the default emission factors as provided in Attachment M. 

D. Non-Exempt Activities 

The proposed activities are within the exemption amount as provided in Attachment M. 

E. Modeling Report 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 
Oil Spill Information 

(30 CFR Part 550.219 and 550.250)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 14

A. Oil Spill Response Planning 

All the proposed activities in this Joint Initial Exploration Plan will be covered by the Regional Oil 

Spill Response Plan (OSRP) filed by Murphy Exploration & Production Company - USA’s 

(Operator No. 02647) in accordance with Title 30 CFR Part 254 submitted in April 2013 and 

approved June 4, 2013. Murphy has determined that the proposed worst-case discharge from the 

well location does not supersede our existing Mississippi Canyon Block 600 listed in the Regional 

OSRP. The calculations and assumptions for our Regional OSRP were verified in Plan Control No. 

N-9687.

B. Spill Response Sites 

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

activities. 

Primary Response Equipment Location Pre-Planned Staging Location(s) 

Lake Charles, LA 

Houma, LA 

Houma, LA 

C. OSRO Information 

Murphy utilizes Clean Gulf Associates (CGA) as its 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 Determination 

Category Regional OSRP Exploration Plan 

Type of Activity Exploratory / MODU Exploratory / MODU 

Facility Surface Location Mississippi Canyon Block 600 Mississippi Canyon Block 692 

Facility Description Location A Location A 

Distance to Nearest Shoreline 

(Miles) 53 miles 63 miles 

Volume: 

 Storage Tanks (total) 

 Flowline (On Facility) 

 Lease Term Pipeline 

 Uncontrolled Blowout (day) 

Potential 24 Hour Volume 

(Bbls.)

335,032 bbls 296,918 bbls 

Type of Liquid Hydrocarbon Oil Oil 

API Gravity 30° 34.7° 
Oil Spill Information 

(30 CFR Part 550.219 and 550.250)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 15

Since Murphy has the capability to respond to the appropriate worst-case spill scenario included in 

its Regional OSRP approved on June 4, 2013, and since the worst-case scenario determined for our 

EP does not replace the worst-case scenario in our Regional OSRP, I hereby certify that Murphy has 

the capability to respond, to the maximum extent practicable, to a worst-case discharge, or a 

substantial threat of such a discharge, resulting from the activities proposed in our EP. 

Included is NTL 2010-N06 data pertaining to the assumptions and calculations for the potential 

worse case discharge associated with the proposed drilling activities in the Plan; in addition to 

preventative and intervention measures, and response planning and strategies. 

E. Oil Spill Response Discussion 

Included as Attachment N is the Oil Spill Response Discussion/OSRAM for the proposed 

exploratory operations. 

F. Modeling Report 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 

G. NTL 2010-N06 

Included as Attachment O, is data pertaining to the assumptions and calculations for the potential 

worse-case discharge associated with the proposed activities in the Plan; in addition to preventative 

and intervention measures, and response planning and strategies. 
Environmental Monitoring Information 

(30 CFR Part 550.221 and 550.252)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 16

A. Monitoring Systems 

Murphy subscribes to Impact Weather Service which provides access to real-time weather 

conditions, and provides periodic updates on impending inclement weather conditions such as 

tropical depressions, storms and/or hurricanes entering the Gulf of Mexico. 

Murphy also relies on the National Weather Service to support the aforementioned subscribed 

service. During impending inclement weather conditions, Murphy closely coordinates the activity 

with our contractors and field personnel to ensure the safety of people for evacuation; measures to 

prepare the facility for evacuation to ensure protection of the environment and the 

facility/equipment. 

Mississippi Canyon Block 692 is in water depths greater than 300 meters (984 feet); therefore, 

Murphy will follow the guidelines of the applicable Notice to Lessees NTL 2009-G02 by monitoring 

and gathering ocean current data using Acoustic Doppler Current Profile (ADCP) while the MODU 

is on location. 

B. Incidental Takes 

The Bureau of Ocean Energy Management revised regulations in Title 30 CFR Part 550, Subpart B 

to require lessees/operators to provide for monitoring systems if the activities provided for in this 

Plan have the potential to result in an incidental take of any federally listed species and/or marine 

mammals. 

Murphy does not anticipate the incidental taking of any species as a result of the proposed activities 

based on the implementation of, and adherence to, the BSEE NTL 2012-G01 “Marine Trash and 

Debris Awareness Training and Elimination” and JOINT NTL 2012-G01 “Vessel Strike Avoidance 

and Injured/Dead Protected Species Reporting”. 

C. Flower Garden Banks National Marine Sanctuary 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 
Lease Stipulations/Special Conditions Information 

(30 CFR Part 550.222 and 550.253)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 17

A. Lease Stipulations 

Under the Outer Continental Shelf Lands Act, the Bureau of Ocean Energy Management is charged 

with the responsibility of managing and regulating the exploration and development on the OCS. 

As part of the regulatory process, an Environmental Impact Statement (EIS) is prepared for each 

lease sale, at which time mitigation measures are addressed in the form of lease stipulations, which 

then become part of the oil and gas lease terms and are therefore enforceable as part of that lease. 

As part of this process, the designated operator proposing to conduct related exploratory and 

development activities, must review the applicable lease stipulations, as well as other special 

conditions, which may be imposed by the Bureau of Ocean Energy Management, and other 

governing agencies. 

Bureau of Ocean Energy Management did not invoke any stipulations for Lease OCS-G 34455, 

Mississippi Canyon Block 692 and includes the following special conditions: 

 Marine Protected Species 

Lease Stipulation No. 8 is to reference measures to minimize or avoid potential adverse impacts to 

protected species (sea turtles, marine mammals, gulf sturgeon, and other federally protected species). 

BOEM/BSEE has issued Notice to Lessees NTL 2012-JOINT-G02 “Implementation of Seismic 

Mitigation Measures and Protected Species Observer Program”, NTL 2012-G01 “Marine Trash and 

Debris Awareness Training and Elimination” and NTL 2012-G01 “Vessel Strike Avoidance and 

Injured/Dead Protected Species Reporting”. 

B. Special Conditions 

 Subsea Completions 

Murphy may potentially complete the proposed well locations as a subsea completion. Therefore, 

Murphy will follow the regulations in Title 30 CFR Parts 250.286 through 250.295 and 550.296 

through 550.299, which mandates the submittal and approval of separate regulatory filings entitled 

as a “Deepwater Operations Plan” and a “Conservation Information Document”, respectively. 

 Breton Sound Area 

Mississippi Canyon Block 692 is located within the 200 km zone of the Breton National Wildlife 

Refuge, and will consider the use of best available control technology as required as Notice to 

Lessees 98-10 if the projected air emissions are determined to significantly affect the air quality of an 

onshore area. 
Lease Stipulations/Special Conditions Information 

(30 CFR Part 550.222 and 550.253)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 18

 Ocean Current Monitoring 

The proposed operations under this Plan are in water depths greater than 300 meters (984 feet); 

therefore, Murphy will follow the guidelines of the applicable regulations and NTL 2009-G02 by 

monitoring and gathering ocean current data using Acoustic Doppler Current Profile (ADCP) while 

the MODU is on location. 

 Significant OCS Sediment Resources 

BOEM has issued Notice to Lessees NTL 2009-G04 “Significant OCS Sediment Resources in the 

Gulf of Mexico” which provides guidance for the avoidance and protection of significant OCS 

sediment resources essential to coastal restoration initiatives in the OCS Gulf of Mexico Region. 

The intent of this guidance is to balance mineral development with the protection of human, marine, 

and coastal environment. 

The significant OCS sediment refers to deposits, including clay, silt, sand, and gravel size particles 

and shell found on or below the surface of the seabed on the OCS. 

The NTL requires that bottom-disturbing activities avoid, to the maximum extent practicable, 

significant OCS sediment resources; which include any activity that lasts more than 180 days and is 

located within 305 lateral meters (1,000 feet) and 20 vertical meters (65 feet) below the natural 

seafloor of any designated sediment resources is considered bottom-disturbing. 

The activities proposed in this Plan (emplacement of platforms, wells, drilling rigs, pipelines, 

umbilicals, and cable) will not impact an area defined by the BOEM Website link inclusive of maps, 

and GIS data for significant OCS sediment resources. 

 
Environmental Mitigation Measures Information 

(30 CFR Part 550.223 and 550.254)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 19

The Bureau of Ocean Energy Management revised regulations in Title 30 CFR Part 550, Subpart B 

to require lessees/operators to provide for monitoring systems if the activities provided for in this 

Plan have the potential to result in an incidental take of any federally listed species and/or marine 

mammals. 

Murphy does not anticipate the incidental taking of any species as a result of the proposed activities 

based on the implementation of, and adherence to, the BSEE NTL 2012-G01 “Marine Trash and 

Debris Awareness Training and Elimination” and NTL 2012-JOINT-G01 “Vessel Strike Avoidance 

and Injured/Dead Protected Species Reporting”. 
Related Facilities and Operations Information 

(30 CFR Part 550.256)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 20

A. Produced Liquid Hydrocarbons Transportation Vessels 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 
Support Vessels and Aircraft Information 

(30 CFR Part 550.224 and 550.257)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 21

A. General 

Personnel involved in the proposed operations will typically use their own vehicles as transportation 

to and from the selected onshore base; whereas the selected vendors will transport the equipment by 

a combination of trucks, boats and/or helicopters to the onshore base. The personnel and 

equipment will then be transported to the drilling rig via the transportation methods and frequencies 

shown below, taking the most direct route feasible as mandated by weather and traffic conditions: 

Type 

Maximum Fuel 

Tank Storage 

Capacity 

Maximum No. in Area 

at Any Time 

Trip Frequency or 

Duration 

Supply Boats 3500 Gallons 2 Two times weekly 

Crew Boats 1500 Gallons 1 Weekly 

Aircraft 280 Gallons 1 As needed 

B. Diesel Oil Supply Vessels 

The following table details the vessels to be used for purposes other than fuel (i.e., corrosion 

control): 

Size of Fuel 

Supply Vessel 

Capacity of Fuel 

Supply Vessel 

Frequency of Fuel 

Transfers 

Route Fuel Supply Vessel 

Will Take 

260’ feet 4500 bbls Weekly From the shorebase in 

Fourchon, LA to MC 692 

C. Drilling Fluids Transportation 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 

D. Solid and Liquid Wastes Transportation 

Included as Attachment L is a listing of the solid and liquid wastes associated with the proposed 

activities in this Plan, detailing the types of waste and approximate composition, total amount, name 

and location, rate and transport method. 

E. Vicinity Map 

A Vicinity Plat showing the location of Mississippi Canyon Block 692 relative to the shoreline and 

onshore base is included as Attachment P. 
Onshore Support Facilities Information 

(30 CFR Part 550.225 and 550.258)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 22

A. General 

The proposed surface disturbances in Mississippi Canyon Block 692 will be located approximately 

63 miles from the nearest Louisiana shoreline, and approximately 123 miles from the onshore 

support base. 

Name Location Existing/New/Modified 

 C Logistics Fourchon, LA Existing 

Murphy 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 does not anticipate the need for any expansion 

of the selected facilities as a result of the activities proposed in this 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, expand existing base facilities. 

C. Support Base Construction or Expansion Timetable 

According to NTL 2008-G04, this section of the Plan is not applicable to the proposed operations. 

D. Waste Disposal 

Included as Attachment L is a listing of waste disposal facilities to be utilized as part of the 

associated activities in this Plan; detailing the types of waste, amount, rate and disposal method to be 

sent to shore. 
Coastal Zone Management Act (CZMA) Information 

(30 CFR Part 550.226 and 550.260)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 23

Under direction of the Coastal Zone Management Act (CZMA), the States of Alabama, Florida, 

Louisiana, Mississippi and Texas developed Coastal Zone Management Programs (CZMP) to allow 

for the supervision of significant land and water use activities that take place within or that could 

significantly impact their respective coastal zones. 

A. Consistency Certification 

A certificate of Coastal Zone Management Consistency for the States of Louisiana and Mississippi 

are enclosed as Attachment Q. 

B. Other Information 

Included as Attachment R are the enforceable policies from the State of Mississippi that are related 

to OCS Plan Filings.

Murphy Exploration & Production Company has considered all of Louisiana’s enforceable policies 

and certifies the consistency for the proposed operations.
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 24

A. Impact Producing Factors (IPF’s) From Proposed Activities 

The following matrix is utilized to identify the affected environments that could be impacted by these 

IPF’s. An “x” has been marked for each IPF category that Murphy has determined may impact a 

particular environment as a result of the proposed activities. For those cells which are footnoted, a 

statement is provided as to the applicability of the proposed activities, and where there may be an 

effect, an analysis of the effect is provided. 

Environmental 

Resources 

Impact Producing Factors (IPFs) 

Emissions 

(air, noise, 

light, etc.) 

Effluents 

(muds, cuttings, 

other discharges 

to the water 

column 

or seafloor) 

Physical 

disturbances 

to the seafloor 

(rig, anchor, 

structure 

emplacement, etc.) 

Wastes 

sent to 

shore for 

treatment 

or disposal 

Accidents 

(e.g. oil 

spills, 

chemical 

 spills, H2S 

releases) 

Other 

IPFs 

you 

identify

Site Specific at Offshore 

Location 

 

Designated topographic 

features 

(1) (1) (1) 

Pinnacle Trend area live 

bottoms 

(2) (2) (2) 

Eastern Gulf live bottoms (3) (3) (3) 

Chemosynthetic 

communities 

 (4) 

Water quality 

Fisheries 

Marine mammals (8) (8) 

Sea turtles (8) (8) 

Air quality (9) 

Shipwreck sites (known or 

potential) 

 (7) 

Prehistoric archaeological 

sites 

 (7) 

 

Vicinity of Offshore 

Location 

 

Essential fish habitat (6) 

Marine and pelagic birds 

Public health and safety (5) 

 

Coastal and Onshore 

Beaches (6) 

Wetlands (6) 

Shorebirds and coastal 

nesting birds 

 (6) 

Coastal wildlife refuges 

Wilderness areas 

 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 25

Footnotes for Environmental Impact Analysis Matrix 

1. Activities that may affect a marine sanctuary or topographic feature. Specifically, if the well or platform 

site or any anchors will be on the seafloor within the: 

(a) 4-mile zone of the Flower Gardens Banks, or the 3-mile zone of Stetson Bank; 

(b) 1000-m, 1-mile or 3-mile zone of any topographic feature (submarine bank) protected by the 

Topographic Features Stipulation attached to an OCS lease; 

(c) Essential Fish Habitat (EFH) criteria of 500 ft from any no-activity zone; or 

(d) Proximity of any submarine bank (500 ft buffer zone) with relief greater than 2 meters that is not 

protected by the Topographic Stipulation attached to an OCS lease. 

2. Activities with any bottom disturbance within an OCS lease block protected through the Live Bottom 

(Pinnacle Trend) Stipulation attached to an OCS lease. 

3. Activities within any Eastern Gulf OCS block where seafloor habitats are protected by the Live Bottom 

(Low-Relief) Stipulation attached to an OCS lease. 

4. Activities on blocks designated by the BOEM as being in water depths 300 meters or greater. 

5. Exploration or production activities where H2S concentrations greater than 500 ppm might be 

encountered. 

6. All activities that could result in an accidental spill of produced liquid hydrocarbons or diesel fuel that 

you determine would impact these environmental resources. If the proposed action is located a sufficient 

distance from a resource that no impact would occur, the EIA can note that in a sentence or two. 

7. All activities that involve seafloor disturbances, including anchor emplacements, in any OCS block 

designated by the BOEM as having high-probability for the occurrence of shipwrecks or prehistoric sites, 

including such blocks that will be affected that are adjacent to the lease block in which your planned 

activity will occur. If the proposed activities are located a sufficient distance from a shipwreck or 

prehistoric site that no impact would occur, the EIA can note that in a sentence or two. 

8. All activities that you determine might have an adverse effect on endangered or threatened marine 

mammals or sea turtles or their critical habitats. 

9. Production activities that involve transportation of produced fluids to shore using shuttle tankers or 

barges. 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 26

B. Impact Analysis 

Site Specific at Offshore Location 

 Designation Topographic Features 

There are no anticipated emissions, effluents, physical disturbances to the seafloor, wastes 

transported to shore, and/or accidents from the proposed activities that could cause impacts 

to topographic features. The proposed surface disturbances within Mississippi Canyon Block 

692 are located approximately 75 miles away from the closest designated topographic feature 

(Sackett Bank). The crests of designated topographic features in the northern Gulf are 

found below 10 m. In the event of an accidental oil spill from the proposed activities, the 

gravity of such oil (high gravity condensate and/or diesel fuel) would rise to the surface, 

quickly dissipate, and/or be swept clear by the currents moving around the bank; thereby 

avoiding the sessile biota. 

 Pinnacle Trend Area Live Bottoms 

There are no anticipated emissions, effluents, physical disturbances to the seafloor, wastes 

sent to shore, and/or accidents from the proposed activities that could cause impacts to a 

pinnacle trend area. The proposed surface disturbances within Mississippi Canyon Block 

692 are located approximately +/-70 miles from the closest pinnacle trend live bottom 

stipulated block. The crests of the pinnacle trend area are much deeper than 20 m. In the 

event of an accidental oil spill from the proposed activities, the gravity of such oil (high 

gravity condensate and/or diesel fuel) would rise to the surface, quickly dissipate, and/or be 

swept clear by currents moving around the bank; and thus not impacting the pinnacles. 

 Eastern Gulf Live Bottoms 

There are no anticipated emissions, effluents, emissions physical disturbances to the seafloor, 

wastes sent to shore, and/or accidents from the proposed activities that could cause impacts 

to Eastern Gulf live bottoms. The proposed surface disturbances within Mississippi Canyon 

Block 692 are located a significant distance (>100 miles) from the closest pinnacle Eastern 

Gulf live bottom stipulated block. In the event of an accidental oil spill from the proposed 

activities, the gravity of such oil (high gravity condensate and/or diesel fuel) would rise to 

the surface, quickly dissipate, and/or be swept clear by currents moving around the bank; 

and would not be expected to cause adverse impacts to Eastern Gulf live bottoms because 

of the depth of the features and dilutions of spills. 

 Chemosynthetic Communities 

Water depths in Mississippi Canyon Block 692 range 5718 feet to 6193 feet. Therefore, the 

proposed activities are not located within the vicinity of any known chemosynthetic 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 27

communities, which typically occur in water depths greater than 300 meters. Based on the 

water depth, there are no anticipated emissions, effluents, emissions physical disturbances to 

seafloor, wastes sent to shore, and/or accidents from the proposed activities that could 

impact these types of communities. 

 Water Quality 

Routine operational discharges authorized by EPA’s Region VI NPDES General Permit 

GMG290000 are regulated based on volume discharge rate limitations, and certain testing 

requirements for oil and grease and toxicity limitations. As such, it is not anticipated these 

discharges will cause significant adverse impacts to water quality. 

Accidental oil spill releases from the proposed activities, and cumulative similar discharge 

activity within the vicinity could potentially cause impacts to water quality. It is unlikely that 

an accidental oil spill release would occur from the proposed activities. In the event of such 

a release, the water quality would be temporarily affected by the dissolved components and 

small droplets. Currents and microbial degradation would remove the oil from the water 

column or dilute the constituents to background levels. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

 Fisheries 

Accidental oil spill releases from the proposed activities, and cumulative similar discharge 

activity within the vicinity may potentially cause some detrimental effects on fisheries. It is 

unlikely a spill would occur; however, such a release in open waters closed to mobile adult 

finfish or shellfish would likely be sub-lethal and the extent of damage would be reduced to 

the capability of adult fish and shellfish to avoid a spill, to metabolize hydrocarbons, and to 

excrete both metabolites and parent compounds. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

Murphy will conduct the proposed activities under EPA’s Region VI NPDES General 

Permit GMG290000 which authorizes the discharge of certain effluents, subject to certain 

limitations, prohibitions and recordkeeping requirements. As such, it is not anticipated these 

discharges will cause significant adverse impacts to water quality. 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 28

 Marine Mammals 

As a result of the proposed activities, marine mammals may be adversely impacted by 

emissions, effluents, waste sent to shore, and/or accidents. 

Chronic and sporadic sub-lethal effects could occur that may stress and/or weaken 

individuals of a local group or population and make them more susceptible to infection from 

natural or anthropogenic sources. Few lethal effects are expected from accidental oil spill, 

chance collisions with service vessels and ingestion of plastic material. 

The net results of any disturbance would depend on the size and percentage of the 

population affected, ecological importance of the disturbed area, environmental and 

biological parameters that influence an animal’s sensitivity to disturbance and stress, and the 

accommodation time in response to prolonged disturbance (Geraci and St. Aubin, 1980). 

Collisions between cetaceans and ship could cause serious injury or death (Laist et al., 2001). 

Sperm whales are one of 11 whale species that are hit commonly by ships (Laist et al., 2001). 

Collisions between OCS vessels and cetaceans within the project area are expected to be 

unusual events. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

Murphy will conduct the proposed activities under EPA’s Region VI NPDES General 

Permit GMG290000 which authorizes the discharge of certain effluents, subject to certain 

limitations, prohibitions and recordkeeping requirements. As such, it is not anticipated these 

discharges will cause significant adverse impacts to water quality. 

Additionally, Murphy does not anticipate the incidental taking of any marine mammals as the 

result of the proposed activities. The proposed activities will be conducted by our company 

and its contractors under the additional criteria addressed by based on the implementation 

of, and adherence to, the BSEE NTL 2012-G01 “Marine Trash and Debris Awareness 

Training and Elimination” and NTL 2012-JOINT-G01 “Vessel Strike Avoidance and 

Injured/Dead Protected Species Reporting”. 

 Sea Turtles 

As a result of the proposed activities, sea turtles may be adversely impacted by emissions, 

effluents, waste sent to shore, and/or accidents. 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 29

Small numbers of turtles could be killed or injured by chance collision with service vessels or 

by eating indigestible trash, particularly plastic items accidentally lost from drilling rigs, 

production facilities and service vessels. Drilling rigs and project vessels (construction 

barges) produce noise that could disrupt normal behavior patterns and create some stress to 

sea turtles, making them more susceptible to disease. Accidental oil spill releases are 

potential threats which could have lethal effects on turtles. Contact and/or consumption of 

this released material could seriously affect individual sea turtles. Most OCS related impacts 

on sea turtles are expected to be sub-lethal. Chronic and/or avoidance of effected areas 

could cause declines in survival or productivity, resulting in gradual population declines. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

Murphy will conduct the proposed activities under EPA’s Region VI NPDES General 

Permit GMG290000 which authorizes the discharge of certain effluents, subject to certain 

limitations, prohibitions and recordkeeping requirements. As such, it is not anticipated these 

discharges will cause significant adverse impacts to water quality. 

Additionally, Murphy does not anticipate the incidental taking of any sea turtles as the result 

of the proposed activities. The proposed activities will be conducted by our company and its 

contractors under the additional criteria addressed by BSEE NTL 2012-G01 “Marine Trash 

and Debris Awareness Training and Elimination” and NTL 2012-JOINT-G01 “Vessel Strike 

Avoidance and Injured/Dead Protected Species Reporting”. 

 Air Quality 

The proposed activities are located approximately 63 miles to the nearest shoreline. There 

would be a limited degree of air quality degradation in the immediate vicinity of the 

proposed activities. Air quality analyses of the proposed activities are below the BOEM 

exemption level. As such, Murphy does not anticipate any IPF’s as a result of the proposed 

activities. 

 Ship Wreck Sites (Known or Potential) 

There are no physical disturbances to the seafloor which could impact known or potential 

shipwreck sites, as the review of high resolution shallow hazards data indicate there are no 

known or potential shipwreck sites located within the surveyed area. As such, Murphy does 

not anticipate any IPF’s as a result of the proposed activities. 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 30

 Prehistoric Archaeological Sites 

There are no physical disturbances to the seafloor which could cause impacts to prehistoric 

archaeological sites, as the review of high resolution shallow hazards data and supporting 

studies did not reflect the occurrence of prehistoric archaeological sites. As such, Murphy 

does not anticipate any IPF’s as a result of the proposed activities. 

Vicinity of Offshore Location 

 Essential Fish Habitat 

As a result of the proposed activities, essential fish habitat may be adversely impacted by 

effluents and/or accidents. 

An accidental oil spill that may occur as a result of the proposed activities has potential to 

cause some detrimental effects on essential fish habitat. It is unlikely that an accidental oil 

spill release would occur; however, if a spill were to occur in close proximity to finfish or 

shellfish, the effects would likely be sub-lethal and the extent of damage would be reduced to 

the capability of adult fish and shellfish to avoid a spill, to metabolize hydrocarbons, and to 

excrete both metabolites and parent compounds. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

 Marine and Pelagic Birds 

As a result of the proposed activities, marine and pelagic birds may be adversely impacted by 

an accidental oil spill, by the birds coming into contact with the released oil. It is unlikely 

that an accidental oil spill release would occur. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

 Public Health and Safety 

There are no anticipated emissions, effluents, wastes sent to shore, and/or accidents from 

the proposed activities that could cause impacts to the public health and safety. Murphy has 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 31

requested BOEM approval to classify the proposed objective area as absent of hydrogen 

sulfide. 

Coastal and Onshore 

 Beaches 

As a result of the proposed activities, beaches may be adversely impacted by an accidental oil 

spill. However, due to the distance from shore (approximately 63 miles), and the response 

capabilities that would be implemented, no significant adverse impacts are expected. Both 

historical spill data and the combined trajectory/risk calculations referenced in the 

publication of OCS EIA /EA BOEM 2002-052 indicate there is little risk of contact or 

impact to the coastline and associated environmental resources. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

 Wetlands 

As a result of the proposed activities, wetlands may be adversely impacted by an accidental 

oil spill. However, due to the distance from shore (approximately 63 miles) and the 

response capabilities that would be implemented, no significant adverse impacts are 

expected. Both historical spill data and the combined trajectory/risk calculations referenced 

in the publication of OCS EIA /EA BOEM 2002-052 indicate there is little risk of contact 

or impact to the coastline and associated environmental resources. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

 Shore Birds and Coastal Nesting Birds 

As a result of the proposed activities, shore birds and coastal nesting birds may be adversely 

impacted by an accidental oil spill. However, due to the distance from shore (approximately 

63 miles) and the response capabilities that would be implemented, no significant adverse 

impacts are expected. Both historical spill data and the combined trajectory/risk calculations 

referenced in the publication of OCS EIA /EA BOEM 2002-052 indicate there is little risk 

of contact or impact to the coastline and associated environmental resources. 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 32

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

 Coastal Wildlife Refuges 

As a result of the proposed activities, coastal wildlife refuges may be adversely impacted by 

an accidental oil spill. However, due to the distance from shore (approximately 63 miles) 

and the response capabilities that would be implemented, no significant adverse impacts are 

expected. Both historical spill data and the combined trajectory/risk calculations referenced 

in the publication of OCS EIA /EA BOEM 2002-052 indicate there is little risk of contact 

or impact to the coastline and associated environmental resources. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

 Wilderness Areas 

As a result of the proposed activities, wilderness areas may be adversely impacted by an 

accidental oil spill. However, due to the distance to the nearest area (approximately 63 

miles) and the response capabilities that would be implemented, no significant adverse 

impacts are expected. Both historical spill data and the combined trajectory/risk calculations 

referenced in the publication of OCS EIA /EA BOEM 2002-052 indicate there is little risk 

of contact or impact to the coastline and associated environmental resources. 

In the event of an unanticipated blowout resulting in an oil spill, it is unlikely to have an 

impact based on the industry wide standards for using proven equipment and technology for 

such responses, implementation of Murphy’s Regional Oil Spill Response Plan which 

addresses available equipment and personnel, techniques for containment and recovery, and 

removal of the oil spill. 

Other Resources Identified 

Murphy has not identified any other environmental resources other than those addressed above. 

C. Impacts on Proposed Activities 

Murphy does not anticipate any impacts on the offshore site specific locations, offshore vicinity, 

and/or coastal and onshore environmental conditions. 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 33

D. Environmental Hazards 

Mississippi Canyon Block 692 is not located within a geographic area impacted by strong 

environmental phenomena, other than potential hurricanes in the Gulf of Mexico. Additionally, this 

block has the potential to be affected by the "Loop Current" which is a warm ocean current in the 

Gulf of Mexico that flows northward between Cuba and the Yucatan peninsula, moves northward 

into the Gulf of Mexico, then loops east and south before existing to the east through the Florida 

Straits. While the loop current is present approximately 95% of the time, it is most active in the 

summer and fall seasons. 

 

The subsea facilities have been designed to meet the current regulations and API RP 95J design 

criteria for these hurricane events. To mitigate potential impacts to the well during impending 

hurricanes or loop currents, Murphy will take precautionary measures to shutting in the well prior to 

full evacuation. 

E. Alternatives 

According to NTL 2008-G04 this section does not apply to Exploration Plan. 

F. Mitigation Measures 

Murphy will not implement any mitigation measures to avoid, diminish, or eliminate potential 

environmental risks, other than those required by regulation and policy. 

G. Consultation 

Murphy has not contacted any agencies or persons for consultation regarding potential impacts 

associated with the proposed activities. Therefore, a list of such entities is not being provided. 

H. Preparers 

Questions or requests for additional information should be made to Murphy’s authorized 

representative/preparer of this Plan: 

Christine Groth 

R.E.M. Solutions, Inc. 

15021 Katy Freeway, Suite 620 

Houston, Texas 77094 

281.492.3240 (Phone) 

281.492.6117 (Fax) 

christine@remsolutionsinc.com 
Environmental Impact Analysis 

(30 CFR Part 550.227 and 550.261)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 34

I. References 

The following documents were utilized in preparing the Environmental Impact Assessment: 

Document Author Dated 

Shallow Hazards Survey Geoscience Earth & Marine 

Services 

2013 

BOEM Environmental Impact Statement Report No. 2007-

003 BOEM 2007 

Title 30 CFR Part 550 Subpart B (550.241/550.247/ 

550.252/550.254) BOEM 2012 

NTL 2012-N04 “Flaring and Venting Requests” BSEE 2012 

NTL 2009-G39 “Biologically Sensitive Underwater Features 

and Areas BOEM 2009 

NTL 2012-JOINT-G01 “Vessel Strike Avoidance and 

Injured/Dead Protective Species” BOEM & BSEE 2012 

BSEE NTL 2012-G01 “Marine Trash & Debris Awareness 

& Elimination” BSEE 2012 

NTL 2005-G07 “Archaeological Resource Surveys and 

Reports” BOEM 2005 

NTL 2011-JOINT-G01 “Revisions to the List of OCS Lease 

Blocks Requiring Archaeological Resource Surveys and 

Reports” BOEM & BSEE 2011 

NTL 2009-G40 “Deepwater Benthic Communities” BOEM 2009 

NTL 2009-G26 “U.S. Air Force Communication Towers” BOEM 2009 

NTL 2009-G27 “ Submitting Exploration Plans and 

Development Operations Coordination Documents BOEM 2009 

NTL 2009-G29 “Implementation Plan for Transition from 

North American Datum 27 to North American Datum 83 BOEM 2009 

NTL 2009-G31 “Hydrogen Sulfide” BOEM 2009 

NTL 2009-G34 “Ancillary Activities” BOEM 2009 

NTL 2012-G01 “Drilling Windows, Eastern Gulf of 

Mexico” BOEM 2012 

NTL 2009-N11 “Air Quality Jurisdiction on the OCS” BOEM 2009 

NPDES General Permit GMG290000 EPA – Region VI 2007 

Regional Oil Spill Response Plan Murphy Exploration & 

Production Company 

2012 
Administrative Information 

(30 CFR Part 550.228 and 550.262)

Mississippi Canyon Block 692 (Lease OCS-G 34455) 2/14/2013 

Initial Exploration Plan Page 35

A. Exempted Information Description (Public Information Copies 

Only) 

Excluded from the Public Information copies are the following: 

 Proposed bottomhole location information 

 Proposed total well depths (measured and true vertical depth) 

 New and Unusual Technology 

 Geological and Geophysical Attachments 

B. Bibliography 

The following documents were utilized in preparing the Plan: 

Document Author Dated 

 

Shallow Hazards Survey Geoscience Earth & Marine 

Services 

2013 

BOEM Environmental Impact Statement Report 

No. 2007-003 

BOEM 2007 

Regional Oil Spill Response Plan 

Murphy Exploration & 

Production Company 

2012 

 
OCS Plan Information Form 

Attachment A 

(Public Information) 
U.S. Department of the Interior OMB Control Number: 1010-0151

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

OCS PLAN INFORMATION FORM 

General Information 

Type of OCS Plan: Exploration Plan (EP) Development Operations Coordination Document (DOCD) 

Company Name: BOEM Operator Number: 

Address: Contact Person:

Phone Number:

E-Mail Address: 

If a service fee is required under 30 CFR 550.125(a), provide the Amount paid Receipt No. 

Project and Worst Case Discharge (WCD) Information

Lease(s): Area: Block(s): Project Name (If Applicable): 

Objective(s) Oil Gas Sulphur Salt Onshore Support Base(s): 

Platform/Well Name: Total Volume of WCD: API Gravity: 

Distance to Closest Land (Miles): Volume from uncontrolled blowout: 

Have you previously provided information to verify the calculations and assumptions for your WCD? Yes No 

If so, provide the Control Number of the EP or DOCD with which this information was provided 

Do you propose to use new or unusual technology to conduct your activities? Yes No

Do you propose to use a vessel with anchors to install or modify a structure? Yes No 

Do you propose any facility that will serve as a host facility for deepwater subsea development? Yes No 

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

Proposed Activity Start Date End Date No. of Days 

Exploration drilling 

Development drilling 

Well completion 

Well test flaring (for more than 48 hours) 

Installation or modification of structure 

Installation of production facilities 

Installation of subsea wellheads and/or manifolds 

Installation of lease term pipelines 

Commence production 

Other (Specify and attach description) 

Description of Drilling Rig Description of Structure 

Jackup Drillship Caisson Tension leg platform

Gorilla Jackup Platform rig Fixed platform Compliant tower 

Semisubmersible Submersible Spar Guyed tower

DP Semisubmersible Other (Attach Description) 

Drilling Rig Name (If Known): 

Floating production 

system 

Other (Attach Description) 

Description of Lease Term Pipelines 

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

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

X Initial

Murphy E & P Company 02647

Robert Lanza

16290 Katy Freeway, Suite 110 281-675-9135

Houston, Texas 77094 robert_lanza@murphyoilcorp.com

$11,019.00 74410407887

OCS-G 34455 MC 692 Sea Eagle

X Port Fourchon, LA

A 296,918 STB/Day 34.7°

 63 13.82 MMSTB (77 days)

X

X

X

X

7/1/2014 5/1/2016 120/Well

X

Discoverer Deep Seas





Well Location Plat 

Attachment B 

(Public Information) 
MURPHY EXPLORATION & PRODUCTION COMPANY

Sea Eagle Prospect – Mississippi Canyon 692

Proposed Location Plat (Public)

Scale: 1" = 2000'

Loc B 

SL

Loc C

SL

Loc A 

SL

X = 1,188,000.00

X = 1,203,840.00

Y = 10,280,160.00

Y = 10,264,320.00

Location Latitude Longitude X Y WD (ft.)

Loc A 8,130.0 FEL 1,682.0 FNL N 28 D 19 M 00.05228 S W 88 D 22 M 57.20343 S 1,195,710.00 10,278,478.00 5,901

Loc B 5,440.0 FEL 1,425.0 FNL N 28 D 19 M 02.90127 S W 88 D 22 M 27.13651 S 1,198,400.00 10,278,735.00 5,927

Loc C 7,603.0 FEL 4,908.0 FNL N 28 D 18 M 28.16640 S W 88 D 22 M 50.89393 S 1,196,237.00 10,275,252.00 5,917

Block Calls
Bathymetry Map 

Attachment C 

(Public Information) 
MURPHY EXPLORATION & PRODUCTION COMPANY

Sea Eagle Prospect – Mississippi Canyon 692

Bathymetry Map (Public)

Scale: 1" = 2000' C.I. = 10'

Note: 2,000' radius circle shown 

around each wellbore location 

LLOYD RIDGE 5

Loc 

A

Loc 

B

Loc 

C

NOTE: Bathymetric contours generated 

using Hi-Res AUV survey data

5,901' 5,927'

5,917'
Geological Description 

Attachment D 

(Proprietary Information) 
Structure Maps 

Attachment E 

(Proprietary Information) 
Deep Seismic Lines 

Attachment F 

(Proprietary Information) 
Cross Section Maps 

Attachment G 

(Proprietary Information) 
Shallow Hazards Assessment 

Attachment H 

(Public Information) 
10615 Shadow Wood Drive, Suite 200 

 Houston, Texas 77043

 713.468.1410[o] 713.468.1438 [f] 

www.gemsinc.com 

January 28, 2013 Project No. 1012-2152b 

Murphy Exploration & Production Co. 

16290 Katy Frwy. 

Suite 600 

Houston, Texas 77094 

Attention: Mr. Alan Hadfield 

Site Clearance Letter 

Proposed Wellsite MC692-A 

Block 692 (OCS-G-34455) 

Mississippi Canyon Area 

Gulf of Mexico 

Murphy Exploration & Production Co. (Murphy) contracted Geoscience Earth & Marine Services Inc.®, 

(GEMS) to provide an assessment of the shallow geologic conditions to determine the favorability of 

drilling operations for the proposed location MC692-A in block 692 (OCS-G-34455), Mississippi Canyon 

Area, Gulf of Mexico. This letter addresses specific seafloor and subsurface geologic conditions, to a 

depth of about 4,917 ft below the mudline (bml), at the Proposed Wellsite MC692-A. The proposed 

location appears suitable for exploration drilling operations; however, caution is recommended while 

drilling through the potentially sand-prone sequences below 406 ft bml with respect to the potential for 

shallow water flow and shallow gas. 

The following sections provide details specific to the well location, including: available data, Notice to 

Lessees (NTL) requirements, man-made features, and wellsite conditions. 

Proposed Well Location

The surface location for Proposed Wellsite MC692-A is in the north-central portion of MC 692. Murphy 

plans to drill this well using a dynamically positioned drilling vessel. Our assessment addresses the

seafloor conditions within a 2,000 ft radius around the proposed wellsite location. Murphy provided the 

following coordinates for the proposed wellsite: 

Proposed Wellsite MC692-A 

Spheroid & Datum: Clarke 1866, NAD27 

Projection: UTM Zone 16 North Line Reference Block Calls 

MC 692 

X: 1,195,710 ft Latitude: 28o 19’ 00.05228” N Inline 1367 7,710 ft FWL 

Y: 10,278,478 ft Longitude: 88o 22’ 57.20343” W Crossline 5833 1,682 ft FNL 

Available Data 

The following discussion is based on findings provided within the main body of the geohazard and 

archaeological report for Block MC 692 (OCS-G-34455), GEMS Report No. 1012-2152b (GEMS, 2012). 

The text, maps, and figures included in the report provide detail on the regional geology of the survey 

area. Data assessed for the report and site clearance letters include a 3-D time volume and AUV 

(Autonomous Underwater Vehicle) data. 

The 3-D seismic time volume provided by Murphy for the geohazard analysis, covers a 25 square-mile 

area that includes all and portions of Federal lease Blocks 647-649, 691-693, and 735-737 in the 
Proposed Wellsite MC692-A Site Clearance Letter 

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FORUM ENERGY TECHNOLOGIES, INC. 

Mississippi Canyon (MC) protraction area (Figure A-1). An AUV survey was conducted in October 2012 

by C & C Technologies, Inc. (C & C) over the blocks of interest (Figure A-1). GEMS used the C & C 

survey data, to complete an archaeological and geohazard assessment over MC 692 (GEMS, 2012). A 

scanned copy of the gamma ray and resistivity logs in addition to the scout ticket for Murphy’s MC 737 #1 

well were provided to GEMS by Murphy. The well logs were used to identify potential sand layers within 

the stratigraphic units in the survey area. 

Figure A-1. Seafloor Rendering of the Mississippi Canyon Survey Area. The black lines represent existing 

pipelines and the black dot represents an existing well (BOEM, 2013a). The red lines symbolize seafloor faults, the 

green dot represents the proposed well location, and the green circle is a 2,000 ft radius around the proposed wellsite.

Attachments 

Wellsite maps are centered on the Proposed Exploration Wellsite MC692-A location and are displayed at 

a 1 inch = 1,000 ft scale (1:12,000). The maps included in this letter are as follows: 

Map No. MC692A-1: Bathymetry Map 

Map No. MC692A-2: Seafloor Features Map 

Map No. MC692A-3: Side-Scan Sonar Mosaic 

Map No. MC692A-4: Geologic Features Map 

The illustrations accompanying this letter were extracted from the available datasets and are listed below: 

Illustration MC692A-1: Side-Scan Sonar Mosaic and Subbottom Profile Showing Seafloor and 

Near-Surface Conditions Near Proposed Wellsite MC692-A 

3-D SURVEY AREA 

AUV SURVEY AREA 

MC692-A 

2000 ft 

Murphy 

MC 737 #1 
Proposed Wellsite MC692-A Site Clearance Letter 

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FORUM ENERGY TECHNOLOGIES, INC. 

Illustration MC692A-2: Portions of Inline 1367 and Crossline 5833 Showing Conditions Beneath 

Proposed Wellsite MC692-A 

Illustration MC692A-3: Tophole Prognosis Chart, Proposed Wellsite MC692-A, Mississippi 

Canyon Block 692 

Illustration MC692A-4: Arbitrary Seismic Profile Illustrating Geologic Conditions at the Murphy 

MC 737 #1 Well Relative to Proposed Wellsite MC692-A 

NTL Requirements

The following letter complies with the Bureau of Ocean Energy Management (BOEM) Notice to Lessees 

(NTL’s) 2008-G04, 2008-G05, and 2009-G40, (MMS, 2008a, b, and 2010). The Federal lease Block 

MC 692 is located within a historically significant area (BOEM, 2011); therefore, requirements set forth in 

NTL 2005-G07 are applicable (MMS, 2005). An archaeological assessment was completed for MC 692 

and included as Appendix A in the main report (GEMS, 2012). The anticipated archaeological conditions

within 2,000 ft of the proposed well are included in the Man-Made Features and Archaeological 

Assessment section of this letter. 

According to NTL 2008-G05 (MMS, 2008b), 3-D seismic reflection data may be used for shallow hazard 

assessments with approval from the BOEM, Gulf of Mexico Region. A power spectrum analysis was 

conducted from the 3-D seismic data cube provided by Murphy to illustrate the data parameters 

(Figure A-2). The power spectrum curve was generated within a 500-ft radius of the intersection of the 

inline and crossline at the proposed wellsite. We converted the amplitude vs. frequency spectrum, 

generated by the SMT software, to power vs. frequency by squaring the amplitude values as described by

J. A. Coffeen, 1978. 

Figure A-2. Power Spectrum Analysis Curve, Proposed Wellsite MC692-A

Man-Made Features and Archaeological Assessment

The surface location is clear of any wells, pipelines, or platforms within a 2,000 ft radius from the 

proposed wellsite. The closest existing infrastructure to the proposed well is a 14 to16-inch gas pipeline 

owned by WFS and a 14 to 16-inch oil pipeline owned by Williams. These pipelines are about 2,400 ft 

northwest of the proposed location (Map No. MC692A-1). Based on the available data, no archaeological

avoidances and no known shipwrecks or objects exist within the area of potential effect for the proposed 

Well MC692-A. There are no unidentified side-scan sonar contacts located within 2,000 feet of the 

proposed MC692-A well (Map No. MC692A-2). Unidentified Side-Scan Sonar Contact No. 3 is located 

about 2,500 ft northeast of the proposed wellsite. The contact measures 3.52 ft in length and 6.40 ft in 

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0 10 20 30 40 50 60 70 80 90 100

Power (Amp2)

Frequency (Hz)

POWER SPECTRUM
Proposed Wellsite MC692-A Site Clearance Letter 

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FORUM ENERGY TECHNOLOGIES, INC. 

width with no measureable height. Sonar Contact No. 2 lies about 4,700 ft southwest of the proposed 

location (Illustration MC692A-1). Contact No. 2 measures 6.80 ft long, 2.58 ft wide, and 2.07 ft in height. 

These sonar contacts are considered to be modern debris from shipping, storms, fishing, and/or 

exploration activities. An archaeological avoidance is not assigned for these targets; however, a 100-foot 

geohazard avoidance is recommended for all side-scan sonar contacts. Unidentified Side-Scan Sonar 

Contact No. 8, located in the east-central portion of MC 692, is interpreted as a potential shipwreck. A 

1,500-foot archaeological avoidance for this contact is recommended. Side-Scan Sonar Contact No. 8 

lies about 1.7 miles southeast of Proposed Well MC692-A. 

Wellsite Conditions 

The proposed location is clear of any constraining geologic conditions along the seafloor within a 2,000 ft 

radius of the proposed wellsite. The shallow stratigraphy at the proposed well location reflects alternating 

deposition of mass-transport, turbidity flow, and slope-fan deposits interbedded with hemipelagic clays. 

Overpressured sands and minor amounts of shallow gas are possible within the sand-prone sequences. 

Precautions should be made when drilling through these potentially overpressured intervals. 

Water Depth and Seafloor Conditions

Seafloor conditions are favorable at the proposed wellsite location. The water depth at the proposed 

surface location is approximately -5,901 ft and the seafloor slopes southeast at about 0.3° 

(Map No.MC692A-1). The proposed well location lies along a subtle, gently-dipping seafloor 

(Map No. MC692A-2). Slightly irregular/hummocky seafloor conditions are evident at the proposed 

location. The hummocky morphology is the seafloor expression of underlying mass-transport deposits. A 

surficial drape (~10 ft thick) of high water content silty clays covers the seafloor (Illustration MC692A-1). 

Deepwater Benthic Communities

Deepwater benthic communities are not expected at the proposed wellsite. There are no features or 

areas that could support significant, densely-populated benthic communities within 2,000 ft of the 

proposed location. The Side-Scan Sonar Mosaic (Map No. MC692A-3) shows normal or ambient returns 

along the seabed with no indication of any hard-bottom or fluid expulsion events within 2,000 ft of the 

proposed well. 

Stratigraphy

Subbottom Profiler Line 115 is the closest AUV line to the proposed location (Illustration MC692A-1). 

Inline 1367 and Crossline 5833 are the closest 3-D lines to Proposed Wellsite MC692-A 

(Illustration MC692A-2). The Tophole Prognosis Chart (Illustration MC692A-3) shows the crossline 

annotated with calculated depths to the mapped horizons, predicted unit lithologies, and potentials for 

both shallow water flow and shallow gas. 

Stratigraphic conditions to the limit of investigation (4,917 ft bml) are shown on Illustrations MC692A-1 

through MC692A-4. The sedimentary section has been subdivided into five seismic units or sequences. 

The AUV subbottom profiler shows an acoustically transparent drape approximately 10 ft thick at the top 

of Unit 1 beneath the proposed location (Illustration MC692A-1). The drape likely consists of very soft, 

high water content pelagic clays. Shear strengths will gradually increase corresponding to a decrease in 

water content throughout the remainder of Unit 1 (164 ft bml). 

A mass-transport deposit, about 35 ft thick, occurs just beneath Horizon 10 at the top of Unit 2 

(164 ft bml), Illustration MC 692A-1. The mass-transport deposits likely have higher than normal shear 

strengths. The remainder of Unit 2 (Horizon 10 to Horizon 20) will consist primarily of mud-rich turbidites 

interlayered with thin mass-transport deposits. The Measurement While Drilling (MWD) logs for the 

MC 737 #1 well show a sand layer less than 10 ft thick at about 364 ft bml. This sand layer may correlate 

to the base of Unit 2 at the Proposed Wellsite MC692-A. 

Units 3 and 4 are slope fan-channel complexes (Illustrations MC692A-2 through MC692A-4). These 

intervals are part of regional sequences known as the Blue and Green units. The sequences will consist 
Proposed Wellsite MC692-A Site Clearance Letter 

Murphy Exploration & Production Co. // January 28, 2013

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FORUM ENERGY TECHNOLOGIES, INC. 

of stratified and chaotic intervals from 406 ft to 2,579 ft bml. The stratified sediments include turbidites, 

levee, overbank, and sheet sand deposits. Chaotic intervals include mass-transport deposits and 

channel fill. Thin, continuous sand layers and seams are likely within the stratified intervals interbedded 

with clays and silty clays. The chaotic intervals will contain mud-rich sediments; however, scattered sand 

pockets and layers are likely. The MWD logs for MC 737 #1 display sand layers throughout the Blue and

Green units. Sand layers measuring up to 10 ft thick within the Blue unit and up to 40 ft thick within the 

Green unit are evident at the MC 737 #1 well. Sediments within the Blue unit at the MC 737 #1 well 

consist of stratified turbidites while Blue unit sediments at the proposed location are predominantly 

clay-rich, mass-transport deposits. Potential sand seams within the stratified slope-fan deposits at the 

MC 737 #1 well may not correlate to the chaotic mass-transport deposits at the proposed location within 

Unit 3 (Illustration MC692A-4). Various sand layers within the Green unit at the MC 737 #1 well could not 

be directly correlated to the proposed wellsite; however, thin sand seams are expected within the Green 

unit slope-fan deposits at the Proposed Wellsite MC692-A (Illustration MC692A-4). 

Unit 5 (2,597 ft to 4,917 ft bml) consists of stratified reflectors to the limit of the investigation. The section 

will consist of turbidites interbedded with thin mass-transport deposits. The turbidites will be alternating 

layers of clay, silt, and sand. The MWD logs show interspersed sand layers up to 70 ft thick at the 

MC 737 #1 well. Similar stratigraphy is expected at the Proposed Wellsite MC692-A between 2,597 ft 

and 4,917 ft bml (Illustration MC692A-4). 

Faults 

Proposed Wellsite MC692-A is not expected to intersect any seafloor or buried faults in the shallow 

section to the limit of investigation (Illustration MC692A-2). The closest seafloor fault lies approximately 

4,750 ft northeast of the proposed location. This fault trends northwest to southeast and is downthrown to 

the northeast. 

Several buried faults exist near the proposed well location within Units 4 and 5 (1,467 ft to 4,917 ft bml), 

Map No. MC692A-4 and Illustrations MC692A-2 and MC692A-3. These faults are adjustment faults and 

generally trend northeast-southwest. These faults do not appear to be intersected by the proposed well 

and are not expected to impact drilling operations.

Shallow Gas and Shallow Water Flow 

The potential for shallow gas at this well location is generally negligible to low, while the potential for 

shallow water flow is negligible to moderate (Illustration MC692A-3). 

Shallow Gas. There are no apparent subsurface high-amplitude anomalies directly beneath the 

proposed wellsite (Map No. MC692A-4 and Illustration MC692A-3). A negligible potential for 

encountering shallow gas exists within the clay-prone intervals within Units 1 and 2 (seafloor to 

406 ft bml). There is a low potential for encountering shallow gas within Unit 3 (406 ft to 713 ft bml), 

Unit 4 (713 ft to 2,579), and Unit 5 (2,579 ft to 4,917 ft bml). Low- to moderate-amplitude reflectors within 

the channel, turbidite, mass-transport, and slope-fan deposits may indicate gas-filled, coarse grained

sediments of predominantly clay-rich intervals. Minor amounts of solution gas may be encountered within 

isolated sands. 

Shallow Water Flow. The Blue and Green units (Units 3 and 4) are slope-fan complexes that contain 

sand-rich intervals and have sourced shallow water flow problems in the Mississippi Canyon region 

(BOEM, 2013b). Nine incidents are reported from wells in a 20-mile radius of the proposed MC 692-A 

location within these sequences. Reported depths below the mudline to the flows vary from 924 ft to 

2,374 ft. The severity of the flows varied from moderate to low. Exploration and production wells in

MC 736 to the south do not appear on the BOEM listing of shallow water flow incidents; however, no 

drilling reports are available from these offset wells. MWD logs for Murphy’s MC 737 #1 well were 

provided to assess potential sand layers within the stratigraphic units at the proposed well location. 

Based on the seismic character, the regional history of Blue and Green units, and the MWD logs from the 

MC 737 #1 well, we consider the section from 406 ft to 2,373 ft bml to have a moderate potential for 

overpressured sand layers. The MWD logs show interspersed sand layers throughout Units 3 and 4. 

Sand layers at the MC 737 #1 well measure up to 10 ft thick within Unit 3 and up to 40 ft thick within
Proposed Wellsite MC692-A Site Clearance Letter 

Murphy Exploration & Production Co. // January 28, 2013

Geoscience Earth & Marine Services, Inc. ® // 6 

FORUM ENERGY TECHNOLOGIES, INC. 

Unit 4. Although these sand layers may not directly correlate to the sediments in Units 3 and 4 at the 

proposed well location, interbedded sand layers are expected. 

Units 2 and 5 have a low potential for overpressured sand layers. Any sands encountered within the 

turbidite and mass-transport deposits within this unit are expected to be thin seams and not likely to

produce sustained flows. The clay-rich surficial sequence (Unit 1) has a negligible potential for 

overpressured sands. 

Results and Recommendations 

The Proposed Wellsite A, Mississippi Canyon Block 692, appears suitable for exploration drilling 

operations; however, some constraints were observed. We advise using caution while drilling through the 

potential overpressured sands below 406 ft bml, some of which may contain minor amounts of biogenic 

gas. Particular concern should be given to Units 3 and 4 (406 ft to 2,373 ft bml) that correlate to the 

regional Blue and Green units. These units are associated with numerous water flow events throughout 

much of the Mississippi Canyon Area. 

Closing 

We appreciate the opportunity to be of service to Murphy Exploration & Production Co., and look forward 

to working with Murphy on future projects. 

Sincerely, 

GEOSCIENCE EARTH & MARINE 

SERVICES, INC.®

Carla Cleveland Daniel Lanier 

Geoscientist Vice President-Geosciences 

Kendra Kennedy, M. A. Erin Williams Janes 

Marine Archaeologist Senior Geoscientist/Project Manager 

Attachments (4 Maps and 3 Illustrations) 

Distribution: 

Mr. Alan Hadfield, Murphy Exploration & Production Co. (6 Copies) 

REFERENCES 

Bureau of Ocean Energy Management, 2011, Notice to lessees and operators of federal oil and gas leases and 

pipeline right-of-way holders on the outer continental shelf, Revisions to the list of OCS lease blocks requiring 

archaeological resource surveys and reports: U. S. Department of the Interior, Bureau of Ocean Energy

Management, Bureau of Safety and Environmental Enforcement, Gulf of Mexico OCS Region (GOMR), NTL 2011-

JOINT-G01. Effective Date December 29, 2011. 

Bureau of Ocean Energy Management, 2013a, ASCII Data Files, published on the BOEM Gulf of Mexico Region 

Homepage, <http://www.data.boem.gov/homepg/data_center/mapping/geographic_mapping.asp>, Accessed 

January, 2013. 
Proposed Wellsite MC692-A Site Clearance Letter 

Murphy Exploration & Production Co. // January 28, 2013

Geoscience Earth & Marine Services, Inc. ® // 7 

FORUM ENERGY TECHNOLOGIES, INC. 

Bureau of Ocean Energy Management, 2013b, Safety performance review – shallow waterflows can pose significant 

hazards to deepwater drilling, published on the BOEM Gulf of Mexico Region Homepage, <http://www.boem.gov/Oiland-Gas-Energy-Program/Resource-Evaluation/Geological-and-Geophysical-Reviews/Reviews-Gulf-ofMexico.aspx>, accessed January, 2013. 

Coffeen, J. A., 1978, Seismic Exploration Fundamentals: Tulsa, the Petroleum Publishing Co., p. 125. 

Geoscience Earth & Marine Services, Inc. (GEMS), 2012, Geologic, stratigraphic, and archaeological assessment 

block 692 (OCS-G-34455), Mississippi Canyon Area, Gulf of Mexico, Project No. 1012-2152b. 

Minerals Management Service, 2005, Notice to lessees and operators of federal oil, gas, and sulphur leases and 

pipeline right-of-way holders in the outer continental shelf, Gulf of Mexico OCS region, Archaeological resource 

surveys and reports: U. S. Department of the Interior, Minerals Management Service, Gulf of Mexico, NTL 2005-G07. 

Effective Date July 1, 2005. 

Minerals Management Service, 2008a, Notice to lessees and operators of federal oil, gas, and sulphur leases in the 

outer continental shelf, Gulf of Mexico OCS region, information requirements for exploration plans and development 

operations coordination documents: U. S. Department of the Interior, Minerals Management Service, Gulf of Mexico, 

NTL 2008-G04. Effective Date May 1, 2008. 

Minerals Management Service, 2008b, Notice to lessees and operators of federal oil, gas, and sulphur leases and 

pipeline right-of-way holders in the outer continental shelf, Gulf of Mexico OCS region, shallow hazards program: U. 

S. Department of the Interior, Minerals Management Service, Gulf of Mexico, NTL 2008-G05. Effective Date May 1, 

2008. 

Minerals Management Service, 2010, Notice to lessees and operators of federal oil and gas leases in the outer 

continental shelf, Gulf of Mexico OCS region, Deepwater benthic communities: U. S. Department of the Interior, 

Minerals Management Service, Gulf of Mexico, NTL 2009-G40. Effective Date January 27, 2010.