关键词: 乙型水驱曲线, 关系式, 累积产油量, 丙型水驱曲线, 累积产水量, 水油比, 水驱油田, 含水饱和度方程, 半对数坐标纸, 采收率

Abstract: Plots constructed on semilog coordinate paper for cumulative water output (Wp)vs cumulative oil output (Np), or cumulative water-oil ratio (WOR)vs cumulative oil output (Np) are called water drive curves,a useful tool for making predictions of the performance and ultimate recovery factor of an oil field that has been widely adopted. Based on the displacement theory for two-phase flow,including the frontaldrive equation and the average water-saturation equation proposed respectively by Buckley-Leverett and Welge, also the empirical equation by Ilflos, several different relationship of water drive curves, including types A, B and C as defined by Tong Xianzhang, are derived.