巴州坳陷白垩+侏罗系饱和度计算方法

A Calculating Method for Saturation of Crateceous and Jurassic in Bazhou Depression

巴州坳陷白垩＋侏罗系储集层是以粉砂岩－中砂岩为主的孔隙性砂岩储集层，具有低孔、低渗到特低孔、特低渗的物性特征，不具备Hanber公式的使用条件，利用Hanber公式计算饱和度时会导致较大的误差。本文以岩电实验为依据，分析了巴州坳陷白垩＋侏罗系储集层的孔隙结构类型，建立了计算饱和度的方程，并在实际应用中见到了良好的地质效果。

The reservoirs of Crateceous and Jurassic in Bazhou Depression are sandstone mainly from siltstone to mdeiem sand.They show the physical properties that the porosity and permeability are from lower to superlow respectively.The Hanber's equation does not apply to this reservoir.It may result in larger error as it is used to calculate the saturation.Based on the analysis of the litholgic-electric test,this paper analyses the pore structure of the reservoir of Crateceous and Jurassic in Bazhou Depression,and establishes a new aquation of the saturatinn calculation.