Deepwater Installation of a large Capacity FPSO with Large Number of Risers in the marlim Field

摘要

This paper describes the sitie installation of a turret moored Floating Production, Storage and Offloading System-FPSO-in 780 meters of water in Campos Basin, offshore Brzil. The FPSO, a 270,000 dwt converted tanker, is the first of a series of two ordered by Petrobras for development of the Marlim Field. An internal bow mounted Turret system, anchored to the seafloor by 8 chain-wire rope-chain combined mooring legs, is used to permanently moor the FPSO in the location while allowing the vessel to feely weathervane. Thirty-five flexible risers, laid in a free-hanging catenary configuration, provide the flow path between the FPSO and the various subsea equipment on the seafloor. This paper describes the installation equipment and procedures employed.