海上A气田生产水回注可行性方案研究

为实现海上气田生产零污染的目标,在没有现成研究流程和模式的情况下,以浅层封存地质条件研究为基础、以回注层注入指数为桥梁、以地层破裂压力为约束,对A气田分别从浅层断裂系统、回注层位优选、回注层注入能力分析等方面开展生产水回注方案研究,结果表明,A气田浅层地层形态较为完整,断层发育较少,从三潭组至海底未见断层发育,气田生产水回注对断层影响较小,不存在断层溢流的风险。

Feasibility study of produced water reinjection in offshore A gas field

In order to ensure the production without pollution in offshore gasfield,when there is no available study process and mode,based on shallow preservation conditions,bridged by injectivity index and constrained by formation fracture pressure,a study of produced water reinjection in gas field A was carried out,which includes shallow fracture system,reinjection zone selection and injection capacity analysis,and then the study feasibility was verified by numerical simulation,which provides a reference for produced water reinjection in offshore gas field.The results indicate the shallow strata form A gas field is relatively complete,with less faults development,from Santan formation to sea bottom,there was no fault development.The influence of produced water reinjection in gas field is small and there is no fault risk of overflow.