OFFSHORE FACILITY FLOATING PRODUCTION STORAGE OFFLOADING FACILITY AND METHOD OF GENERATING LIQUEFIED NATURAL GAS

摘要

Disclosed is an offshore facility for producing a liquefied natural gas by using an accompanying gas. According to an embodiment of the present invention, the offshore facility comprises: a crude oil production device which includes a crude oil treatment device for producing oil by refining crude oil collected from a sea well, and includes a gas re-injection device for compressing an accompanying gas separated from a crude oil refining step to be re-injected to a reservoir; and a liquefied natural gas producing offshore facility which receives a feed gas including at least a part of an accompanying gas from a crude oil producing offshore facility, and processes and liquefies the feed gas to produce a liquefied natural gas. The crude oil producing offshore facility comprises a feed gas supply unit which recovers a back flow gas generated by reverse-flowing of an injection gas compressed by the gas re-injection device, and generates a feed gas by using the back flow gas. According to an embodiment of the present invention, in an offshore facility for re-injecting a gas (injected gas) compressed by an accompanying gas into a reservoir, a gas re-injected into the reservoir can be reversely flowed and recovered. By using the recovered back-flow gas, a liquefied natural gas is produced. Thus, productivity of the liquefied natural gas using the accompanying gas can be improved.