CPC B63B 21/50 (2013.01) [B63B 35/44 (2013.01); F25B 41/20 (2021.01); F25B 41/24 (2021.01); F25J 1/0022 (2013.01); F25J 1/0259 (2013.01); F25J 1/0278 (2013.01); B63B 25/14 (2013.01); B63B 2035/448 (2013.01); B63B 2035/4473 (2013.01); F25J 2230/30 (2013.01)] | 8 Claims |
1. An offshore facility comprising:
a crude oil production offshore facility having a crude oil processor for refining crude oil collected from a subsea well to produce oil;
a feed gas supplier including a first compressor for compressing an associated gas separated in the process of refining the crude oil for generating a first feed gas such that the associated gas has a first target pressure; and
a gas injector including a second compressor for generating an injection gas by compressing the associated gas compressed by the first compressor such that the compressed associated gas has a second target pressure higher than the first target pressure, and an injection line for reinjecting the injection gas into a reservoir;
a liquefied natural gas production offshore facility supplied with a feed gas from the feed gas supplier including at least a part of the associated gas from the crude oil production offshore facility, and processing and liquefying the feed gas to generate a liquefied natural gas,
wherein the feed gas supplier includes:
a feed gas supply line for transferring the feed gas to the liquefied natural gas production offshore facility;
a back-flow line branched from the injection line and joined to a feed gas supply line for recovering a back-flow gas which flows backward from the reservoir and includes at least a portion of the injection gas reinjected to the reservoir by the gas injector; and
a first decompressor for decompressing the back-flow gas to generate a second feed gas, and
wherein the feed gas comprises at least one of the first feed gas, the second feed gas, a third feed gas, and combinations thereof, decompressed from the injection gas.
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