W -S模型是计算泥质砂岩储层含油饱和度的有效方法 ,具体表述为饱含水泥质砂岩和含油泥质砂岩电导率方程为 :Co=1F′(Cw+BQv) ,Ct=Swn′F′ (Cw+B QvSw)。B是模型中极重要的参数 ,根据其随溶液电导率Cw 和温度T的变化关系可以计算求得 ;m′和n′是计算泥质砂岩储层含油饱和度的重要参数 ,它们均随岩性的不同而变化 ,岩性细 ,m′和n′指数小 ,岩性粗 ,m′和n′指数大 ;Qv 和Rw 是WS饱和度评价模型的基本参数 ,运用激发极化电位测井资料法、常规测井资料法、水分析法及正自然电位曲线法亦可分别求取。这些参数确定后 ,即可将WS模型应用于常规的数字处理。应用效果表明 ,对于泥质砂岩储层 ,WS模型能够提供可靠的储层饱和度 ,进行烃与非烃储层的判断 The W-S model is an effective method to calculate the oil saturation of shaly sand reservoirs. The specific expression is that the conductivity equation of saturated shaly sandstone and oil-bearing shaly sandstone is Co = 1F ’(Cw + BQv), Ct = Swn’F ’(Cw + B QvSw). B is an extremely important parameter in the model and can be calculated from its dependence on the conductivity of solution Cw and temperature T. m and n are important parameters for calculating the oil saturation of shaly sand reservoirs, Sex, the fine lithology, small m ’and n’ indices, coarse lithology and large m ’and n’ indices; Qv and Rw are the basic parameters of the WS saturation evaluation model. By using the excitation polarization potential logging Data method, conventional well logging data method, water analysis and positive natural potential curve method can also be obtained separately. Once these parameters have been determined, the WS model can be applied to conventional digital processing. The application results show that for shaly sands reservoirs, the WS model can provide reliable reservoir saturation for the judgment of both hydrocarbon and non-hydrocarbon reservoirs