【摘要】 注水是油田开发中使用最为普遍的开采方式 ,但水驱采收率一般不高 ,探索水驱后如何提高采收率一直是广大科技工作者思考的问题。注气是一种较好的提高采收率技术 ,在水驱后油田注气潜力如何还不清楚。在此分析了国内外油田水驱后注气项目实施情况 ,并对我国一些油田实例进行了评价 ,对我国油田水驱后注气开发的实施有较好的指导意义更多还原

【Abstract】 Water injection is a commonly used method for the development of oil field. However, oil recovery by waterflooding is usually low. As such, how to enhance oil recovery after waterflooding has been a challenge facing petroleum engineers. Gas injection flooding has long been considered as a viable EOR method in the petroleum industry, but the potential of gas injection after waterflooding is still unclear. In this paper, the schemes of gas injection after waterflooding in China and abroad are analyzed, and some of the Chinese case studies are reviewed.更多还原