| 摘要 |
System for production of oil and heavier gas fractions from a reservoir u nder a seabed, comprising: a field installation with at least one production well and one injection well, which wells are connected with risers to a loa ding and unloading station, a vessel with means to be connected to the loadi ng and unloading station, a receival plant with means to load and unload the vessel. The system is distinguished in that the vessel includes a high-pres sure three-phase separator, an injection compressor, and either water cleani ng equipment or water injection equipment, and the receival plant includes h igh- pressure loading and unloading means, so that the vessel as connected t o the field installation can load high-pressure well fluid that is brought i nto the separator and separated to lighter gas fractions, oil and heavier ga s fractions, and water, of which oil and heavier gas fractions are brought t o high-pressure storage tanks in the vessel, which high-pressure storage tan ks include high-pressure gas which thereby is displaced out of the tanks and injected into the reservoir together with the lighter gas fractions, via th e injection compressor, after which oil and heavier gas fractions after tran sport to the receival plant can be unloaded by displacing the tank contents by high-pressure gas delivered from the receival plant. A vessel and a metho d are also described.
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