用PND测井资料求取水平井储层含水饱和度

Deriving Reservoir Water Saturation in Horizontal Wells by Using PND Logging Data

针对水平井储层含水饱和度解释中存在的难题,根据PND测井资料中具有一定矿化度的地层水的俘获截面大而油气烃类的俘获截面相对较小的特点,来计算储层的含水饱和度和区分油水层。指出该方法的应用条件是:地层水矿化度不小于50000mg/L,孔隙度不小于15％。应用实例证明了该方法的有效性。

In view of the difficulties in reservoir water saturation interpretation in horizontal wells, the calculation of reservoir water saturation and identification of oil and water layers are carried out based on the characteristics of formation water containing certain salinity having higher capture cross section and relative lower hydrocarbon capture cross section in PND logging data. It is pointed out that the application condition of the method is that the salinity of formation water is not less than 5000mg/L, porosity is not less than 15%. The application examples demonstrate that the method is effective.