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根据地下油水渗流规律和水驱特征分析，结合矿场实践提出了确定油井各产层剩余油饱和度的分层驱替特征分析方法．在此基础上进一步确定了油层组、砂岩组等的剩余油分布．这种方法适用于中、高含水期的注水开发油田剩余油饱和度及其分布的确定，并能够根据地层渗透率的变化修正相渗曲线，在一定程度上克服了油藏数值模拟中相渗数据对地层非均质性适应不足的缺点．经安口沈检１井密闭取心的含油饱和度分析和欢５０块两口挖潜井生产实践检验、证明分层驱替特征确定剩余油饱和度的方法是正确、可靠的．
According to the seepage flow law of underground oil and water and the characteristics of water flooding, a stratified displacement analysis method is proposed to determine the residual oil saturation of each production layer in combination with mine practice. Based on this, the distribution of remaining oil in the reservoir group, sandstone group and so on is further confirmed. This method is suitable for the determination of residual oil saturation and its distribution in waterflooding oilfields with medium and high water cut periods and can correct the phase infiltration curve according to the change of formation permeability. To a certain extent, this method overcomes the phase infiltration in reservoir numerical simulation. Disadvantages of inadequate adaptation of data to formation heterogeneity. The oil saturation analysis of closed coring in Well 1 of Shenkou and the production test of 50 wells in Huanqu two wells proved that the method of stratified displacement to determine the remaining oil saturation is correct and reliable.