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Mardi Gras Oil and Gas Transportation System

Operator

BP

Fields

Green Canyon (Mad Dog, Holstein and Atlantis fields), Mississippi Canyon (Thunder Horse field)

Total length

725km (450 miles)

Capability

1 million b/d and 1.5 bcf/d (billion cubic ft of gas /day)

Water depths

4,300ft to 7,200ft (1,200m to 1,950m)

Pipeline diameters

16in, 20in, 24in and 28in

Steel

120,000t southern Green Canyon Area, 70,000t Mississippi Canyon Area

<b>Caesar Oil Pipeline System (Southern Green Canyon Area)</b>

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Trunkline

Holstein spar to a shallow-water platform at Ship Shoal Block 332

Water depth

430ft

Lateral pipeline

Mad Dog spar ties to Caesar pipeline

Lateral pipeline

Atlantis semi-submersible facility to Mad Dog lateral

<b>Cleopatra Gas Gathering System (Southern Green Canyon Area)</b>

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Trunkline

Holstein spar to the Ship Shoal facility

Laterals

Mad Dog and Atlantis tying in

<b>Proteus Oil Pipeline System (Mississippi Canyon Area)</b>

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Catenary riser

Thunder Horse

Trunkline

Thunder Horse to South Pass Block 89E

Water

400ft

<b>Okeanos Gas Gathering System (Mississippi Canyon)</b>

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Lateral

Thunder Horse

Trunkline

NaKika to Destin on Main Pass Block 260

Preliminary engineering services

Intec Engineering

Detailed design

Intec Engineering

Steel catenary risers

Eight (two for each of the four host platforms)

Risers

16in to 24in

Fusion-bonded epoxy (FBE)

Bredero in Alabama

J-lay installation

Heerema

Vessel

Balder

S-lay installation

Allseas

Vessel

Solitaire

Sleds and pipeline end terminals (PLETs)

Omega in Louisiana

No of sleds

20

Weight

110t

Dimensions

60ft by 20ft
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