低孔特低渗岩性油藏原始含油饱和度确定方法探讨

Methods of Determinate Original Oil Saturation in the Reservoir of Low Porosity and Super-low Permeability

目前确定原始含油饱和度的主要方法有密闭取心法、压汞法和测井资料解释法。本文以鄂尔多地盆地G油田为例,利用这三种方法计算了该区低孔特低渗岩性油藏的原始含油饱和度,探讨了三种计算方法的特点并对结果进行了对比验证,结果表明测井资料解释与密闭取心校正相结合是适用于计算本区原始含油饱和度的最优方法。

At present,main methods of determinate original oil saturation are pressure coring,mercury injection and log data interpretation. G oilfield in Ordos basin,for example,use these methods to calculate the original oil saturation in the low porosity and super-low permeability reservoir. Discusses the characteristics of these methods and verify the results. At last,the method of log data interpretation combined with correction of pressure coring is the best method for this area.