基于剩余油可动潜力控制程度的井网调整研究

摘要

The theoretical research on the movable potential of remaining oil is carried out to evaluate the remaining oil in high water-cut oil reservoir.The recoverable reserve abundance of remaining oil,oil flow coefficient and streamline density are taken as the evaluation indexes to evaluate the movable potential of remaining oil.The three parameters are normalized by the membership function to establish an evaluation system for the movable potential control-level of remaining oil.The movable potential control-level distribution of remaining oil for nine-spot pattern in high water-cut stage is analyzed and 5 well network adjustment cases are designed to forecast their adjustment performances.Research demonstrates that this evaluation system with movable potential control-level of remaining oil could rationally characterize the distribution and flow of remaining oil.The corresponding well network adjustment performances from high to low are nine-spot,thinning five-spot,straight line infilling,straight line,invert nine-spot without adjustment and five-spot.The research is further verified by reservoir numerical sinulation,which could provide a significant guidance for the remaining oil evaluation and well network adjustment in high water-cut oil reservoir.%为评价并挖潜高含水油藏的剩余油,开展了剩余油可动潜力控制的理论研究.将剩余油可采储量丰度、油相流动系数、流线密度作为剩余油可动潜力控制的评价指标,利用隶属函数将3个参数进行归一化,建立了剩余油可动潜力控制程度的评价体系.分析了高含水期反九点井网的剩余油可动潜力控制程度的分布特征,设计了5种井网调整方式,并利用调整后的剩余油可动潜力控制程度评价井网调整效果.结果表明:所建立的剩余油可动潜力控制程度评价体系能更合理地反映剩余油的分布和流动特征;运用剩余油可动潜力控制程度评价的井网调整效果由好到差为九点法、抽稀大五点法、直线排状加密、直线排状、不调整反九点法、五点法,并通过油藏数值模拟验证了结果的正确性.该研究对高含水油藏剩余油的评价以及井网调整具有重要的指导意义.