SECTION 10: ENVIRONMENTAL MONITORING INFORMATION

A. Monitoring Systems

A rig based Acoustic Doppler Current Profiler (ADCP) is used to continuously monitor the current 

beneath the Rig. Metocean conditions such as sea states, wind speed, ocean currents, etc. will also 

be continuously monitored

B. Incidental Takes

No incidental takes are anticipated. Shell implements the mitigation measures and monitors for 

incidental takes of protected species according to the following notices to lessees and operators 

from the Minerals Management Service:

NTL No.2012-G01 “Marine Trash and Debris Awareness and Elimination”

NTL No.2012-Joint-G01 “Vessel Strike Avoidance and Injured/Dead Protected Species Reporting”

C. Flower Garden Banks National Marine Sanctuary

The operations proposed in this DOCD will not be conducted within the Protective Zones of the 

Flower Garden Banks and Stetson Bank.

SECTION 11: LEASE STIPULATIONS INFORMATION

Lease OCS-G 7963 was part of Lease Sale No. 98 on May 22, 1985. This lease is part of the 

Mississippi Canyon Block 807 Unit; Unit Contract No. 754393002 approved effective 8/1/92. Unit 

Agreement consists of Leases OCS-G 7957 (SE1/4), 7958 (S1/2), 7962 (E1/2), 7963, 9881 (NE1/4), 

and 9882 (N1/2). The Unit has been held by production. Shell is designated operator of the Unit. 

The Unit Leases are not part of a biological sensitive area, known chemosynthetic area, shipping 

fairway or Military Warning Area. 

Lease OCS-G 24112 was part of Lease Sale #812 on March 20, 2002. This lease is not located in 

a biological sensitive area, known chemosynthetic area, shipping fairway, or Military Warning 

Area. It is designated as having a high potential for containing archeological properties and is

located within 200 kilometers of the Breton Wilderness Area.

SECTION 12: ENVIRONMENTAL MITIGATION MEASURE INFORMATION

A. Impacts to Marine and coastal environments

The proposed action will implement mitigation measures required by laws and regulations, 

including all applicable Federal & State requirements concerning air emissions, discharges to 

water, and solid waste disposal, as well as any additional permit requirements and Shell policies. 

Project activities will be conducted in accordance with the Regional Oil Spill Response Plan. The 

EIA attached as Section 18 to this plan discusses impacts and mitigation measures.
B. Incidental Takes

We do not anticipate any incidental takes related to the proposed operations. Shell implements 

the mitigation measures and monitors for incidental takes of protected species according to the 

following notices to lessees and operators from the Minerals Management Service:

NTL No. 2012-G01 “Marine Trash and Debris Awareness and Elimination”

NTL No. 2012-Joint-G01 “Vessel Strike Avoidance and Injured/Dead Protected 

Species Reporting”
SECTION 13: RELATED FACILITIES AND OPERATIONS INFORMATION

The Mars B project is a joint venture operated by Shell Offshore Inc. The partner in the development is 

British Petroleum. Mars B includes the Olympus tension leg platform (TLP) and the West Boreas/South 

Deimos subsea development. 

The Olympus TLP host will have twenty four direct vertical access (DVA) slots. DVA wells will be tied 

back to the host via top-tensioned risers (TTRs). 

The West Boreas development will be comprised of six subsea wells. The wells will be tied-in via a looped 

8” dual wet-insulated flowline system to the Olympus TLP, approximately 3.5 miles away from the subsea 

manifold. The produced fluids will be processed and commingled with the Mars B DVA well fluids prior to 

exporting the oil and gas via export pipelines. Subsea wells will be controlled from the Olympus platform 

via an electro-hydraulic umbilical. 

This Developments Operations Coordination Document (DOCD) is specifically for the Olympus TLP 

installation, the installation of subsea equipment located at the West Boreas/South Deimos site, the batch 

setting of 24 DVA wells with a semi-submersible rig, and the production of 6 wells at the subsea site that 

will be drilled with a semi-submersible rig. Subsequent DVA wells will be drilled to total depth with the 

DVA rig that is to be installed on the TLP. 

The Olympus TLP will be located in Mississippi Canyon Block 807 in the Central Gulf of Mexico. The 

facility is located approximately 130 miles southeast of New Orleans, Louisiana in approximately 3100 

feet of water. The selected development concept is a tension leg platform with complete processing 

capabilities, including oil and gas separation, oil conditioning, gas dehydration, and produced water 

treating. The TLP will be equipped with a platform drilling rig capable of drilling, completing and 

performing workover/maintenance activities on the 24 DVA wells. 

The execution phase of the Olympus TLP and West Boreas/South Deimos facilities will consist of batch 

setting 24 DVA wells directly under the TLP location by a semi-submersible rig. Batch setting consist of 

pre-drilling and installing the 36” structural pipe, 32” casing, 28” casing, and 22” surface casing for these 

wells. Once the batch set is completed, the TLP hull and its tendons mooring components will be 

installed. The subsea manifolds, umbillicals, and jumpers will be installed as well as export risers & 

flowlines. Once final topsides commissioning activities are completed, the initial West Boreas/South 

Deimos well will initiate oil production to the facility.

Attached Figure 13-1 is a diagram of Phase I, 13-2 is an overhear view of the Phase I installation & 13-3 

is a diagram of the entire project (Phase I & Phase II).

Pipelines proposed in Section 1a:

Size Length Route Product

Shut-in Time in the 

event of a leak

8.625” (2) 18000‟ MC 762-MC 807 Crude 45 seconds

6.625 (8) 100‟ MC 762-MC 762 Crude 45 seconds
Transportation System:

Oil Export

The Olympus oil export line will consist of a 16-inch steel catenary riser and a 16-inch/18-inch pipeline. 

The oil export line will be 40 miles long and end with a rigid riser at WD143C. 

The oil export pipeline and riser will be designed in accordance with ANSI B31.4 for a Maximum Allowable 

Operating Pressure of 2500 psig and a Maximum Allowable Operating Temperature of 140° F. 

Gas Export

The Olympus gas export line will consist of a 16-inch steel catenary riser and 16-inch pipeline. 

The gas export line will be 40 miles long and end with a rigid riser at WD143C. 

The gas export pipeline and riser will be designed in accordance with ANSI B31.8 for a Maximum 

Allowable Operating Pressure of 2220 psig and a Maximum Allowable Operating Temperature of 140° F.

Two lines will be departing WD143C and will tie in subsea to a 30" gas line going to Venice and to a 24" 

line going to Clovelly.

Produced liquid hydrocarbons transportation vessels:

None
SECTION 14: SUPPORT VESSELS AND AIRCRAFT INFORMATION

A. General

Type Maximum Fuel Tank 

Storage Capacity (Gals)

Maximum No. In Area at 

Any Time

Trip Frequency or 

Duration

Crew Boats 8,000 2 2 per week

Offshore Support Vessels 120,000 2 2 per week 

Helicopter 764 1 Once per day

B. Diesel Oil Supply Vessels

Size of Fuel 

Supply 

Vessel

Capacity of Fuel 

Supply Vessel

(Gallons)

Frequency of Fuel 

Transfers

Route Fuel Supply Vessel 

Will Take

280 foot 

length 135,000 1 week Port Fourchon to MC 807

C. Drilling Fluids Transportation

This information is only required for operations offshore Florida.

D. Solid and Liquid Wastes Transportation

See Section 7, Tables 7A & 7B for this information.

E. Vicinity Map

See attachment 14A.
!

! !

!

79 Nautical / 91 Statute Water Miles

to Fourchon Terminal

46

Nautical / 53

Statute

Miles

to

Nearest

Shoreline

72

N

a

utical / 82

Statute

Air Miles

to

B

oothville

Termin

al

SOUTH PASS

MISSISSIPPI

CANYON

WEST DELTA

GRAND ISLE

Port

Fourchon

Boothville Buras

Venice

21 22

5 4

878 879 876 877 875 838 874 839 873 840 872 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858

835 833 834 831 832 794 829 830 795 796 828 797 798 799 800 801 802 803 804 805

785

806

308

784

807 808 809 810 811 812 813 814

791 786 789 790 787 788 750 751 752 753 754 755 756 757

286

758

288

759 760 761 762 763 764 765 766 767 768 769 770

743 744 121 745 746 705 706 707 708 709 710

284 285

711

283

712 713 714 715 716 717 718 719 720 721 722 723 724 725 726

701 118 119 120 702 661 662 663

259 258 664

260

665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682

658 116 115 114 117

256 257 617 255 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635

113

636

112

637

110 111

638

109

230 614 232 231 573

574 575 576 577 578 579 580 581 582 583 584 585 586 587 588

105

589

107 106

590

108

591 592 593 594

227 228 229 570529 530 531 532 533 534 535 536 537 538 539

103 104 102

542

101

543 544 545 546 550

208 209 210

525 526

485 486 487 488 489 490 491 492 493

98

494

100 99

495 498 499 500 501 502 503 504 505 506

185 184 183 481 482 441 442 443 444 445 446 97 447

95 96

448 449 450 454 455 456 457 458 459 460 461 462

180 181 182 179 437 438 397 398 399 92 400 94 93 401 402 403 404 405 406 410 411 412 413 414 415 416 417 418

157 156 155 158 393 394 91 353 89 90 354 355 356 357 361 362 365 366 367 368 369 370 371 372

318

373

316 317

374

152 153 154 151 350 88 347 348 349 309 310 311 312 321 324 147 325 148 326 149

327 328 329 330

267

133 132 135 134 92

87 304 305 306 265 266 86 144 145 141 142 143 280 281 282

137

283

131

284

129 130

285

128

286

90

81 80 84 83 82 85 130 129 128 132 131 133 123

236

125 124

237

126

238 239 240 241 242

87 86 85

76 77 78 74 75 125 126 127 123 124 121 122

86 87 88 85

192 193 194 195 196 197 198

79 80 81

71 70 73 72 112 111 110 114 113 117 116 115

62 61 64 63

147 148 149 150

104

151 76 152 77 153 78 154

64 65 62 63

59 60 57 58

52 51 50 58 57 56 108 109 107 107 100 101 102 103 104 105 106 108 109 110 97 98 99

61 60

45 44 43 46

63 48 49 46 47 42 64 65

55

66

53 54 50 51 52

86 85 84 41 96 95 94

41 42 39 40 20 33 73 36 35 34 40

45 44 48 47 46 49

21 22

26 25 28 27 983

83

71 81 82 72 79 80 32 78 31 76 77 30 74 75 29 72 73 28 69 70 71

42 43 40 41 38 39

984

22 21 23 24 940

61 70 18 21 20 19 24 23 25

33 32 36 35 34 37

57 56 55 54 53 60 59 58 63 62 61 66 65 64 68 67

11 15 14

68 13 17 60 67 16

52

12

31 2 30 3

28 29 26 27 51

9

48 49 50 45 46 47 42 43 44 38 39 40 41 66 65 7 6 59 8 10

22 21 20 23 1 25 24 25 78 152 5 79

14

28 27 26 31 30 29

19

33 32

18

34

17

35

16

37 36

15 3 4

77 151 76

13

2

10 9 12 11

23 24 19 20 21 22 15 16 17 18 14

5

74 148 75

1 80

4

81

5

82

7 8 6 6

4

9 8 7 13 12 11 10 71 72 73 147 69 70 68

2 3

67 83

2 3 1 1

62 61 140 64 63 65

66 84

85 60 139 58 59 57 55 56

54 53

52 41 40 39 43 42 45 44 46 47 48 49

Mississippi Canyon Block 807

OCS-G07963

Lease Vicinity and Transportation Routes

3 ...\CAD_NewOrleans\Maps\Permit Plats\W Boreas-S Deimos\Mars B Lease Vicinity and Transportation Routes.mxd

NAD_1927_UTM_Zone_16N

Projection: Transverse_Mercator

False_Easting: 1640416.666667

False_Northing: 0.000000

Central_Meridian: -87.000000

Scale_Factor: 0.999600

Latitude_Of_Origin: 0.000000

Linear Unit: Foot_US

Shell Exploration and Production Co.

Air Route

Water Route

0 2 4 8 12 16 20

Nautical Miles
SECTION 15: ONSHORE SUPPORT FACILITIES

A. General

The onshore support bases for water and air transportation will be the existing terminals in 

Boothville and Fouchon, Louisiana. The Fouchon boat facility is operated by SOI and is located 

on Bayou LaFourche, south of Leeville, LA approximately 3 miles from the Gulf of Mexico. The 

Boothville heliport is operated by PHI and is located at 38963 La State Highway 23 in Boothville, 

LA.

Name Location Existing/New/Modified

Fourchon Port Fourchon, LA Existing

Boothville PHI Heliport Boothville, LA Existing

B. Support Base Construction or Expansion

The activities in the plan will not cause construction or expansion to existing base.

C. Support Base Construction or Expansion Timetable

The activities in the plan will not cause construction or expansion to existing base.

D. Waste Disposal

See Section 7, Tables 7A and 7B.

SECTION 16: SULPHUR OPERATIONS

This plan does not include Sulphur Operations.
SECTION 17: COASTAL ZONE MANAGEMENT ACT (CZMA) INFORMATION

LOUISIANA

COASTAL ZONE MANAGEMENT

CONSISTENCY CERTIFICATION

Development Operations Coordination Document

Type of Plan

OCS-G 07957, Mississippi Canyon Block 762

OCS-G 07958, Mississippi Canyon Block 763

OCS-G 24112, Mississippi Canyon Block 805

OCS-G 07962, Mississippi Canyon Block 806

OCS-G 07963, Mississippi Canyon Block 807

Offshore Louisiana 

Lease Number, Area & Block

The proposed activities described in detail in this Plan will comply with Louisiana's State and Local Coastal 

Resources Management Act of 1978, Coastal Resources Program, and Coastal Area Management 

Enforceable Policies. 

We have considered all of Louisiana's Enforceable Policies in making this certification of consistency.

SHELL OFFSHORE INC. 

Operator

_____________________________________________

Sylvia A. Bellone

Certifying Official

 02/02/2012

Date