6833.0

34000.0

6833.0

34200.0

6833.0

34400.0

Line:

Trace:

10000 15000 20000 25000 30000 35000

1.300

1.400

1.500

1.600

1.700

1.800

1.900

2.000

2.100

2.200

2.300

2.400

2.500

2.600

2.700

Horizontal

Distance (ft):

6600.0

34195.0

6800.0

34195.0

7000.0

34195.0

Line:

Trace:

15000 20000 25000 30000 35000 40000

1.300

1.400

1.500

1.600

1.700

1.800

1.900

2.000

2.100

2.200

2.300

2.400

2.500

2.600

2.700

Horizontal

Distance (ft):

Project No. 0411-1924 Filename: 111924_fig_GC867-D-1.cdr

Figure GC 867-D-1. Inline 6833 and Crossline 34195 Showing Conditions Beneath Proposed Wellsite GC 867-D

15034.839

14132.748

13230.658

12328.568

11426.478

10524.387

9622.297

8720.207

7818.116

6916.026

6013.936

5111.845

4209.755

3307.665

2405.574

1503.484

601.394

-300.697

-1202.787

-2104.877

-3006.968

-3909.058

-4811.148

-5713.239

-6615.329

-7517.419

-8419.510

-9321.600

-10223.690

-11125.781

-12027.871

-12929.961

-13832.052

-15034.839

RELATIVE AMPLITUDE

TWO-WAY TIME TRAVEL (SEC) TWO-WAY TIME TRAVEL (SEC)

GC

823

GC

867

Northwest Southeast

Inline 6833

SALT

SALT

GC

824

Southwest Northeast

SEAFLOOR

HORIZON 20

HORIZON 35

UNIT 1

UNIT 2

UNIT 3

SEAFLOOR

HORIZON 20

HORIZON 35

HORIZON 40

TOP OF SALT

UNIT 1

UNIT 3

UNIT 4

Crossline 34195

Proposed 

Wellsite GC 867-D

Proposed 

Wellsite GC 867-D

GC

866

GC

822

TOP OF SALT

UNIT 2

GC

778

GC

822

GC

823
6800.0

34195.0

Line:

Trace:

20000 25000 30000

1.500

1.600

1.700

1.800

1.900

2.000

2.100

2.200

2.300

2.400

2.500

2.600

Horizontal

Distance (ft):

Shallow Water Flow and Gas Potential

HIGH

0 1 2 3

0 = NEGLIGIBLE

1 = LOW

2 = MODERATE

3 = HIGH

NEGLIGIBLE

Figure GC 867-D-2. Tophole Prognosis Chart, Proposed Wellsite D, Green Canyon Block 867

Project No. 0411-1924 Filename: 111924_fig_GC867-D-2.cdr

3-D Seismic Section Through

Proposed Wellsite D

X = 2,473,150 FT; Y = 9,856,232 FT

 Crossline 34195 at Inline 6833

NW SE

Crossline 34195

GC

823

PROPOSED WELLSITE D

TWO-WAY TRAVEL TIME (SEC)

GC

867

SEAFLOOR

Water 

Flow Gas

HORIZON 20

TOP OF SALT

Unit 2

1.609

1.656

1.980

-3,944

-4,068

-4,965

124

1,021

124

543

Seafloor Slopes at 5.3° East-Southeast.

Lithology/Stratigraphy

WATER

FLOW AND

GAS

POTENTIAL

Horizon

Horizon

TWT

(sec, bsl)

Depth

(ft, bsl)

Depth

(ft, bml)

Units

Unit

(Interval)

Thickness

(ft)

Unit 3

Potential Drilling

Constraints

HORIZON 35 1.787 -4,422 478 354

Very soft, pelagic drape at seafloor. Hemipelagic silty

clays and thin mass-transport deposits.

Alternating layers of hemipelagic silty clays with chaotic

mass-transport deposits.

Fault near base of unit.

Chaotic sequence created by salt movement. Mixture of

silts and clays.

Negligible potential for overpressured sands.

Negligible potential for shallow gas.

Moderate potential for overpressured sands.

Low potential for shallow gas.

SALT

Top of salt Slopes at 43° to Northeast.

GC

822

Unit 1

Negligible potential for overpressured sands.

Negligible potential for shallow gas.

Faults are possible zones of loss circulation.

FAULT 1.735 -4,280 336

FAULT 1.880 -4,681 737

INTERFACE 1.929 -4,820 876

Mud-rich turbidites.

Fault near base of interval.

1.856 -4,613 669

Chaotic mass-transport. Low potential for overpressured sands.

Low potential for shallow gas.

Faults are possible zones of loss circulation.

Low potential for overpressured sands.

Low potential for shallow gas.

TROUGH PEAK

RELATIVE AMPLITUDE
Apache Deepwater LLC Page D-1 

Joint Initial Exploration Plan June, 2011 

Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)

APPENDIX D 

HYDROGEN SULFIDE INFORMATION 

(A) CONCENTRATION 

Apache Deepwater LLC does not anticipate encountering any H2S during the proposed 

operations. 

(B) CLASSIFICATION 

In accordance with Title 30 CFR 250.490(c), Apache Deepwater requests that Green Canyon 

Blocks 823 and 867 be classified by the BOEMRE as H2S absent. 
Apache Deepwater LLC Page E-1 

Joint Initial Exploration Plan June, 2011 

Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)

APPENDIX E 

BIOLOGICAL, PHYSICAL AND SOCIOECONOMIC INFORMATION 

(a) DEEPWATER BENTHIC COMMUNITIES 

Activities proposed in this EP will disturb seafloor areas in water depths of 300 meters (984 feet) 

or greater; therefore, information as outlined in Attachment A of NTL No. 2009-G40, 

"Deepwater Benthic Communities", is provided below. Apache Deepwater will avoid all highdensity deepwater benthic communities by 2,000 feet from each proposed mud and cuttings 

discharge location and 250 feet from the location of all other seafloor disturbances. 

MAPS 

Included as Attachment E-1 are maps prepared using 3-D seismic data depicting seafloor and 

shallow geological features and areas, and the surface locations of the proposed wells with a 

radius circle of 2000 feet around each well. Also included on the maps is the maximum anchor 

radius for each well, plus the additional 1,000 foot buffer area beyond the proposed maximum 

anchor radius. 

ANALYSIS 

Green Canyon Block 823 Well Locations A, B, and C and Green Canyon Block 867 Well 

Locations A, B, C and D: Using 3-D seismic information, all seafloor features and areas that 

could be disturbed by the activities proposed in this plan have been identified. The likelihood of 

these proposed activities disturbing these seafloor and shallow geologic features is discussed in 

the following summary: 

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

within 2000 feet of any proposed muds and cuttings discharge location. Mud mounds and 

patches of high amplitude seafloor returns exist in Green Canyon Blocks 823 and 867, and have 

a high potential for deepwater benthic communities; therefore, all seafloor disturbances (chains, 

anchors, etc.) will avoid these features by at least 250 feet. 

(B) TOPOGRAPHIC FEATURES MAP 

Activities proposed in this EP do not fall within 305 meters (1000 feet) of a topographic “no 

activity zone”. 

(C) TOPOGRAPHIC FEATURES STATEMENT (SHUNTING) 

All activities proposed under this EP will be conducted outside all Topographic Feature 

Protective Zones, therefore shunting of drill cuttings and drilling fluids is not required 

(D) LIVE BOTTOMS (PINNACLE TREND) MAP 

Green Canyon Blocks 823 and 867 are not located within 61 meters (200 feet) of any pinnacle 

trend feature; therefore a separate bathymetric map is not required. 
Apache Deepwater LLC Page E-2 

Joint Initial Exploration Plan June, 2011 

Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)

(E) LIVE BOTTOMS (LOW RELIEF) STIPULATION 

Green Canyon Blocks 823 and 867 are not located within 100 feet of any pinnacle trend feature 

with vertical relief equal to or greater than 8 feet; therefore, live bottom (low relief) maps are not 

required. 

(F) POTENTIALLY SENSITIVE BIOLOGICAL FEATURES 

Green Canyon Blocks 823 and 867 are not located within 30 meters (100 feet) of potentially 

sensitive biological features; therefore, biologically sensitive area maps are not required. 

(G) REMOTELY OPERATED VEHICLE (ROV) SURVEYS 

BOEMRE has determined that there is enough data gathered in this grid area, therefore, we will 

not be conducting any ROV surveys either pre-spudding or post-drilling operations. 

(H)THREATENED AND ENDANGERED SPECIES, CRITICAL HABITAT, AND MARINE 

MAMMAL INFORMATION 

Under Section 7 of the Endangered Species Act (ESA) all federal agencies must ensure that any 

actions they authorize, fund, or carry out are not likely to jeopardize the continued existence of a 

listed species, or destroy or adversely modify its designated critical habitat. 

In accordance with the 30 CFR 250, Subpart B, effective May 14, 2007, and further outlined in 

Notice to Lessees (NTL) 2008-G04, lessees/operators are required to address site-specific 

information on the presence of federally listed threatened or endangered species and critical 

habitat designated under the ESA and marine mammals protected under the Marine Mammal 

Protection Act (MMPA) in the area of proposes activities under this plan. 

NOAA Fisheries currently lists the Sperm Whale, Leatherback Turtle, Green Turtle, Hawksbill 

Turtle, and the Kemp’s Ridley Turtle as endangered and the Loggerhead Turtle and Gulf 

Sturgeon as threatened. Currently there are no designated critical habitats for the listed species 

in the Gulf of Mexico Outer Continental Shelf, however, it is possible that one or more of these 

species could be seen in the area of our operations. 

(I) ARCHAEOLOGICAL REPORT 

Green Canyon Blocks 823 and 867 are not located in an area determined to have any historic or 

prehistoric cultural resources.