储层原始含油饱和度计算方法研究

储层原始含油饱和度是评价储层的重要指标 ,它的计算方法有 :岩心直接测定方法、间接确定法和毛管压力曲线计算方法。简要地讨论了这几种方法 ,重点探讨了利用毛管压力曲线计算储层原始含油饱和度的方法 ,针对该方法目前使用中存在的问题进行了改进 ,并在该方法的理论基础上 ,结合新疆塔里木盆地北部的实例 ,提出一种便于利用毛管压力曲线计算储层原始含油饱和度的适用方法

COMPUTING METHOD OF RESERVOIR ORIGINALITY OIL SATURATION

Reservoir originality oil saturation is an important index for evaluating reservoir. There are three methods for determining reservoir originality oil saturation: (1)core directness mensuration, (2)indirectness determination and (3)computed by capillary pressure curve. In this paper, the authors discuss briefly these several methods, and emphase on studying the third method. Aiming at the defect of the third method, the authors have improved on the method,and on the basis of the method and combination with the practicality in the north area of the Tarim Basin,Xinjiang, a new method which is convenient for computing reservoir originality oil saturation is put forward with using capillary pressure curve information.