BP is developing the Mardi Gras Transportation System (MGTS), which is a system of large diameter pipelines that will transport gas and oil from its deepwater fields to shore. The areas being developed included the Holstein, Mad Dog and Atlantis fields in Southern Green Canyon, which will transport oil through the Caesar Pipeline System and gas through the Cleopatra Gas Gathering System; and Thunder Horse in Mississippi Canyon, with the Proteus Oil System and Okeanos Gas Gathering System lateral.
The export system consists of gas and oil steel catenary risers that are connected to host spars or semi-submersibles through flexjoints and which are connected together on the seabed through piggable wye sleds with associated jumpers. Water depths range from 4,300 to over 7,000 feet in deep-water sections and as shallow as 400 feet at the conventional platforms. Pipeline diameters and associated jumpers, connectors, valves and piggable wyes range from 16 to 28 inches. Total pipeline length is approximately 330 miles.
