确定储层含油饱和度的测井—毛管资料综合法

针对低阻油层测井资料解释的含油饱和度往往偏低，造成油水层难以识别的问题，提出了确定含油饱和度的测井－毛管资料综合法。该方法以岩心样品的孔隙度分析和压汞实验资料为依据，通过实验室毛管压力与油藏条件下毛管压力、毛管压力与含油高度的关系转换，统计得出了相对含油体积与孔隙度、含油高度的关系，利用该关系可估算储层的含油饱和度。通过油基泥浆及密闭取心资料验证表明，利用该方法所估算的含油饱和度是可信的。

A Method of Calculating Oil Saturation from Log and Capillary Pressure Data

The lower resistivities of reservoirs in Shuanghe oilfield, Henan province result in interpretation of lower oil saturation and difficulty in recognizing oil and water layers. A method of calculating oil saturation from log and capillary pressure data is proposed in this paper. Based on the analysis of porosities for core samples and mercury injection tests, through transforming relationship between capillary pressure in laboratory and that in oilfield as well as between capillary pressure and oil-bearing height, the expression among relative oil-bearing volume porosity and oil-bearing height of reservoirs can be obtained. Using this expression,oil saturation of the reservoir can be estimated reliably.