利用毛管压力资料求原始含油饱和度方法探讨——以绥中36-1油田23井为例

以绥中36-1油田23井16块岩心的毛管压力与物性分析资料为基础,总结了利用毛管压力资料求原始含油饱和度的3种方法,并分别对各方法进行了评价。这3种方法分别是Purcell法,含油高度法和J函数直接拟合法。虽然它们都是以J函数为基础求原始含油饱和度的,但Purcell法和J函数直接拟合法考虑了更多的地层条件,而含油高度法偏重于理论计算。通过与密闭取心分析得到的含油饱和度对比,3种方法均可以得到较为满意的解释结果。

Computing oil saturation using capillary pressure data:Case study of well 23 in Suizhong 36-1 oilfield

This paper demonstrated 3 methods that compute oil saturation from capillary pressure data using the capillary pressure data of 16 cores in well 23 in Suizhong 36 1 oilfield.The method used are Purcell method,oil height method,and J function fitting method.All these methods are based on J function.Purcell method and J function fitting method observe more strictly the formation conditions whereas oil height method focuses more on theoretical computation.As indicated by the oil saturation from cores,all 3 methods yield satisfactory results.