利用水驱曲线计算水驱储量的方法研究

计算水驱储量通常应用童宪章经验公式"7.5B",但在应用中发现应用"7.5B"计算的水驱储量往往偏大,甚至大于原始地质储量,不能应用于特定的油藏。从一维两相渗流出发,对童氏乙型水驱曲线进行了推导,通过水驱曲线计算相对渗透率方法与确定水驱储量计算公式的联立求解,得到确定水驱储量的新方法。该方法克服了由于相渗资料缺乏而不能反映整体油藏渗流情况造成计算公式中b值产生较大误差的问题,使得计算的水驱储量更为合理。该方法对于海上油田开发指标的评价更具有应用价值。

Research on water flooding reserves calculation methods by using water drive curve

In water flooding reserves calculation,the empirical formula'7.5 B'of Tong Xianzhang is generally adopted.While in application,the calculation result by this formula is always bigger,sometimes it is even bigger than the OOIP and then this formula can not be used in specific reservoirs.Starting from one-dimension two-phase flow,the derivation on Mr.Tong's B-type water drive has been carried out.Through water drive curve,a new method based on relative permeability and water drive reserves has been established.The new method can overcome the absence of relative permeability data and make the calculated water drive reserves more reasonable.The application proves this new method is of application value for offshore oil field development indexes evaluation.