油层润湿性对测井计算的含水饱和度的影响

根据对塔里木盆地某储层岩心样品洗油后及老化后的岩电实验及润湿性测量结果研究表明，老化前后储层岩样的润湿性有明显改变，且反映其电学性质的饱和度指数差别很大。根据Ｌ油田某油基泥浆取心井测井计算的含水饱和度和岩心分析的含水饱和度对比，表明油藏润湿性的变化对测井计算的含水饱和度有较大影响，所以，利用测井资料研究油藏饱和度一定要考虑油层润湿性的影响。

The Effect of Wettability of Reservoir on the Log derived Water Saturation

The restoration measurements based on the core samples from a reservoir of the Tarim Basin show that both the wettability and the electrical properties of the core samples before and after restoration change significantly. The comparison between the log derived water saturation and the saturation from core analysis for an oil based mud drilling well in T field demonstrates that the variation of reservoir wettability results in predominant effect on the water saturation evaluation from well logs.