用测井资料预测储层的润湿性

岩心电性及润湿性实验测量结果表明,润湿性对阿尔奇饱和度指数n有很大影响。通过引入相对润湿指数,发现阿尔奇饱和度指数n的对数与相润湿指数之间存在很好的线性关系,为利用饱和度指数预测储层的润湿性提供了依据。同时使用电磁波传播测井和微球形聚焦电阻率测井求出饱和度指数随地层深度的变化曲线,预测储层的润湿性。现场井资料处理结果表明,该方法能快速直观显示不同深度处储层润湿性的变化。

Wettability Forecast of Reservoirs Using Log Data

Laboratory measurements of electrical properties and wettability on cores have shown Archie's saturation exponent n is greatly affected by wettability. A linear relationship exists between the logarithm of saturation exponent n and relative wettability index,which provides the basis for forecasting the wettability of reservoirs using saturation exponent. Saturation exponent n (vs) depth curve is given through Electmagnetic Propagation Tool (EPT) and Microspherical Focused Log (MSFL), from which the changes of wettability with depth will be forecasted. The processed result of in-site log data shows this method can quickly and immediately indicate the changes of reservoir's wettability.