Mardi Gras Oil and Gas Transportation System, Gulf of Mexico, USA
Key Data:
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
Caesar Oil Pipeline System (Southern Green Canyon Area)
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
Cleopatra Gas Gathering System (Southern Green Canyon Area)
Trunkline
Holstein spar to the Ship Shoal facility
Laterals
Mad Dog and Atlantis tying in
Proteus Oil Pipeline System (Mississippi Canyon Area)
Catenary riser
Thunder Horse
Trunkline
Thunder Horse to South Pass Block 89E
Water
400ft
Okeanos Gas Gathering System (Mississippi Canyon)
Lateral
Thunder Horse
Trunkline
NaKika to Destin on Main Pass Block 260
Key Players:
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
