采用孔隙体积法计算平均毛管压力曲线

摘要

针对毛管压力计算饱和度的过程中存在的问题,提出孔渗体积法重建毛管压力曲线,重构代表油藏平均特征的虚拟毛管压力曲线.将该方法在非洲某国某区块进行应用,将砂岩分为3类,对不同类型砂岩分别建立虚拟毛管压力曲线,并提出新的J函数拟合关系式.研究结果表明:J函数取对数后与含油饱和度有很好的线性关系,用该方法计算研究区饱和度精度较高.%Based on the method of capillary to calculate saturation, the hole volume was proposed to rebuild the theoretical capillary pressure curve, which stands for the average character of reservoir. This method was used in African area, where the sands were divided into 3 types, and theoretical capillary pressure map was set up for each sand type. The new relationship expression of J function was obtained. The results show that J function, after logarithmic transformation, has a good linear correlation with oil saturation. This method can be used to explain the saturation of this area.