平湖油藏特高含水阶段提高采收率措施研究

Research on measures of enhancing oil recovery in Pinghu Oilfied at very high water cut period

王庆勇 马国新 张凤喜

WANG Qingyong MA Guoxin ZHANG Fengxi

上海石油天然气有限公司, 上海 200041

Shanghai Petroleum Co. Ltd., Shanghai 200041, China

平湖油气田花港组油藏经过13年的开发,采出程度41%,油田综合含水96%,处于特高含水阶段。针对平湖油藏在高采出程度、特高含水条件下,剩余油分布复杂且无后备资源接替的情况,结合该油田的实际,提出了以精细分析隔夹层类型及地层对比,建立地质模型,进行数值模拟研究,研究剩余油分布;进行了层系重组、油田卡堵水、老井复查、开发油水同层及含油水层、关井压锥、轮流开采等方法,提高采收率,减缓油田产量递减。通过这些方法的选择运用,在油田生产上取得了较好的效果,为特高含水阶段油田开发措施选择具有一定的参考意义。

After 13 years' development, degree of oil recovery of Pinghu Oilfield has reached 41% and water cut is 96%. In view of complicated distribution of residual oil and no candidate reservoirs, some methods to improve oil recovery ratio was proposed in this pa-per including fine interbed analysis, geo-modelling, simulation, layer recombination, water shutoff, log re-interpretation for old well, well shut-in for deconing, etc. After using these methods on different oil wells, oil production rate increases in a period of time and production decline was slow down, and these methods can be used as reference for similar oil fields at extra high water cut period.

https://doi.org/10.3969/j.issn.1008-2336.2011.04.073