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利用有效渗透率、变异系数、剩余可流动油饱和度及有效厚度等９个参数，用模糊数学方法推导出表示剩余油饱和度的隶属函数表达式，并对聚合物驱层系组合进行优化．对每个参数选取一个隶属函数和隶属度，进而得到加权隶属度值，即优先值，可用此值判断组合在一起的层系的优劣．用此方法将萨中北一、二排西部砂岩组划分为４套开发层系，并选择了７种开发方案，第一方案的层系组合，是最优的层系组合，最优值为１．９３．
Using the nine parameters of effective permeability, coefficient of variation, residual flowable oil saturation and effective thickness, the membership function expression of residual oil saturation was deduced by fuzzy mathematics method, and the polymer flooding system combination was optimized. A membership function and membership degree are selected for each parameter, and then a weighted membership value, ie, a priority value, is used to determine the pros and cons of the combined layers. In this method, four sandstone formations in the first and second rows in the northern part of Sa North China are divided into four developmental strata and seven development options are selected. The first combination of strata is the optimal stratigraphic combination, and the optimal value is 1.93.