| 摘要 |
A method and system for sea-based handling/treatment of fluid hydrocarbons (oil) with associated gas include a first separation step in a high-pressure separator ( 18 ) installed on the sea bed, from which is output an oil flow containing an essentially predefined percentage of residual gas. The oil containing residual gas is carried through a riser ( 22 ) up to a surface vessel/production ship ( 12 ), where it is subjected to a second separation step in a second separator ( 24 ) incorporated in a low-pressure surface plant on board the vessel ( 12 ), this separated residual gas being used as fuel for direct/indirect generation of electric power for the operation of the underwater and above-water sections of the system. Water and gas produced in the first separation step is returned to a suitable reservoir by the use of a multiphase pump.
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