应用油水井联动测试优化不稳定注水参数方法研究

Application of oil-water well linkage testing method to optimize unstable water injection parameters

随着油田开发时间的延长,常规注水波及范围相对固定,技术适应性逐渐变差,采用以注水量增减或注水井停开的周期注水是一种有效的提高采收率的方法。本文提出通过对多个周期注水的井组开展油水井联动测试,即在注水量周期性变化或停注开注过程中,监测注入井和采出井井底流压变化,以此来对不稳定注水的波动幅度和波动周期进行优化。该方法操作简单,受外界因素影响小,适用于不同不稳定注水油藏参数优化。

With the extension of oilfield development time,the conventional water injection sweep scope is relatively fixed,and the technical adaptability is gradually deteriorating.It is an effective method to improve oil recovery by using the cycle of water injection volume increasing or decreasing or water injection well stop-start.This article proposes to conduct oil well linkage testing on well groups with multiple cycles of water injection,that is,to monitor the changes in bottom hole flow pressure of injection wells and production wells during the periodic changes in water injection volume or the process of stopping and starting injection,in order to optimize the fluctuation amplitude and period of unstable water injection.This method is simple to operate and less affected by external factors,which is suitable for parameter optimization in different unstable water-injected reservoirs.