高含水期油藏加密井位高效优化方法

Optimization Method of Well Placement in High Water Cut Reservoirs

为实现加密井位的快速优化,从油藏实际出发,基于最优化原理,以实现油藏可动油储量的均衡驱替为目标,建立高含水期油藏加密井位优化数学模型,并基于油藏工程理论建立油藏开发指标的快速计算方法,在此基础上,结合智能优化算法实现加密井位优化数学模型的高效求解,从而形成了一套高含水期油藏加密井位快速优化方法。A油田应用实例表明,新方法优化的井位明显优于人工设计井位,通过新方法井位优化使得储层平面驱替更加均衡,累积产油量增加了12.6×104 m3,增加3.29%,验证了该方法实际应用的可行性。该方法求解过程简洁,无须调用数值模拟器,大幅缩短计算时间,具有可实施性强、计算简便快捷的优点,在高含水油田具有广泛的应用前景。

In order to realize the fast optimization of infill well location at the reservoir in high water cut stage,the mathematical model of infill well location optimization in high water cut reservoir was established based on the principle of optimization to realize the balanced displacement of reservoir movable oil reserves.The fast calculation method of reservoir development index was established based on the theory of reservoir engineering.On this basis,the infill well location optimization was realized by combining the intelligent optimization algorithm.The example showed that the well placement optimized by the new method was obviously better than that designed by man.The well placement optimized by the new method made the reservoir plane displacement more balanced,and the cumulative oil production increased by 1.26×10~5 m~3,which proved the feasibility of the practical application of the method.This method is simple in solving process,does not need to call numerical simulator,which greatly shortens the calculation time.It has the advantages of strong feasibility,simple and fast calculation,and has a wide application prospect in high water cut oilfields.