埕岛油田提高水驱采收率对策研究

胜利油区海上埕岛油田于1993年开始陆续投入开发，在当时的低油价下，采取了“一套层系、大井距开发”技术政策，使其实现了快速建设、高效开发。但是其采油速度和采收率低，与当前油价高、资源紧缺以及海上设施使用寿命不足的矛盾日益突出。对比分析了国内外相似油田的开发对策与效果，针对埕岛油田主力含油层系馆上段的主要开发矛盾，研究提出了细分层系、加密井网、提高单井液量、提高油层动用率、结合应用水平井和鱼骨状水平井开发等综合调整对策，预计实施后采油速度可提高到2％以上，采收率可提高10%以上。图4参20

Measures to improve water drive recovery efficiency of offshore Chengdao Oilfield

Chengdao Oilfield has been exploited since 1993. Special development technical policies, such as one set of strata and wide spacing, were taken to make it develop quickly and efficiently under a lower oil price at that time. The low rate of oil production and recovery efficiency are contradictory to the present high oil price, badly needed resource and short lifespan offshore facilities. Integrated adjustment countermeasures are put forward based on comparing and analyzing the development countermeasures and their results of similar oil reservoirs at home and abroad. They include subdividing of strata, infilling well pattern, improving liquid amount, improving reservoir exploiting rate, and using horizontal well and fishbone horizontal well etc. It is predicted that the rate of oil production can improve by more than 2% and the recovery efficiency by over 10%.