本文应用三维油水两相数值模型计算、室内实验和旷场资料,分析了影响驱替特征曲线直线段出现条件和驱替特征参数大小的主要因素.认为由岩石孔隙结构、岩石表面润湿性及流体性质等因素决定的油水微观渗流特征主要影响驱替效率系数;油层的宏观非均质性和油水粘度比主要影响采水周期系数;开发调整及工艺技术措施的实施主要影响水驱动用储量. In this paper, three-dimensional numerical simulation of oil-water two-phase model, laboratory experiments and open-field data are carried out to analyze the main factors that affect the appearance of the straight line segment and the size of displacement parameters of the displacement characteristic curve. The micro-seepage characteristics of oil and water determined by the fluid properties and other factors mainly affect the displacement efficiency coefficient; the macroscopic heterogeneity of oil layer and the ratio of oil-water viscosity mainly affect the water-harvesting period coefficient; and the implementation of development adjustment and technical measures mainly affects the water-driven reserves.