Method for evaluating reservoir remaining oil saturation distribution field

The invention discloses a method for evaluating a reservoir remaining oil saturation distribution field, which is characterized by comprising the following steps of: drawing a permeability-pressure gradient-oil displacement efficiency relation chart according to oil displacement efficiency measurement experiment results of a target reservoir core under different pressure gradients; and performingnumerical simulation by utilizing the relation chart to obtain a residual oil saturation distribution field of the target reservoir. The problem that according to an existing oil reservoir numerical simulation technology, modeling is conducted through a relative permeability curve, so that the calculated remaining oil saturation of a target reservoir is low, and developers cannot correctly judge the distribution characteristics of the remaining oil of the target reservoir is solved. 本发明公开了一种评价储层剩余油饱和度分布场的方法，其特征在于：根据目标储层岩心在不同压力梯度下驱油效率测定实验结果，绘制渗透率-压力梯度-驱油效率关系图版；利用所述关系图版进行数值模拟以获得所述目标储层的剩余油饱和度分布场；解决现有油藏数值模拟技术通过相渗曲线建模以致计算出