低渗透油藏高含水期压裂水平井流入动态研究

针对低渗透油藏高含水期的压裂水平井,根据油井流入动态关系调整合理工作制度是高含水期油井稳产的重要方法之一。为确定高含水期压裂水平井流入动态,通过水电模拟实验方法和油藏数值模拟方法,考虑应力敏感性和溶解气的影响,分别确定了含水率为0和100%时的压裂水平井流入动态,根据加权平均方法,计算了不同含水率时的流入动态曲线。结果表明:随着含水率的不断上升,流入动态曲线弯曲程度减小,相同井底流压下的油井产量增加。该研究成果可为矿场实际中的高含水压裂水平井工作制度的调整提供科学依据。

Study on Inflow Performance of Fractured Horizontal Well in Low Permeability Reservoirs at High Water Cut Stage

To fractured horizontal wells in low permeability reservoirs at high water cut stage, adjustment of reasonable work system with correct inflow performance is a key to stable production of the wells. In order to determine the inflow performance of fractured horizontal wells at high water cut stage, hydroelectric simulation and numerical simulation with consideration of stress sensitivity and solution gas was performed to investigate the inflow performance when the water cut is 0% and 100%, respectively., thus calculated he inflow performance of different water cut with the method of weighted average. The results show that with the increasing of water cut, the bending degree of the inflow performance curves decreases and the production with the same bottom flowing pressure increases. It is concluded that the inflow performance provide a scientific basis for adjusting reasonable work system of fractured horizontal wells at high water cut stage.