地下水系统对鄂尔多斯低阻油层成因的控制作用

The control effect of groundwater system on The cause of low resistivity reservoir in Erdos

鄂尔多斯西缘广泛发育低电阻率油层,其形成原因与地下水系统关系密切。地下水对电阻率的影响主要表现在以下几个方面:高束缚水饱和度、高地下水矿化度、岩石润湿性、钻井液侵入等。深入研究低电阻率油层,不仅在储层电性研究中具有很高价值,对油气勘探开发也有重大意义。

The low resistivity oil layers are widely developed in the west margin of Ordos Basin,the cause of its formation is Closely related with the groundwater system. The effect of groundwater on the resistivity is mainly manifested in the following aspects：high irreducible water saturation,high groundwater mineralization,the wet-ability of rock,drilling fluid invasion. Fur-ther research on the low resistivity oil has very high value not only in the study of electric property of reservoir, but also has great significance to the exploration and development of oil and？ gas.