东濮凹陷低阻油层成因研究

Genesis of Low Resistivity Reservoir in Dongpu Depression

针对东濮凹陷低阻油层的测井曲线显示特征 ,从岩石物理特性、油藏高度、泥质砂岩阳离子交换、钻井滤液侵入和导电矿物影响等几个方面系统地进行了低阻油层成因研究。研究结果表明 ,东濮凹陷低阻油层的形成是多种因素共同作用的结果 ,但骨架颗粒岩性细、泥质含量偏重、地层水矿化度高。

Based on the characteristics of low resistivity reservoir indicated by well logging plot in Dongpu Depression, the genesis of low resistivity reservoir is systematically studied in aspects of petrophysical property, reservoir height, cation-exchange in shaly sand, invasion of filtrate in drilling and influence of conductive minerals ,etc. The result of study shows that the forming of the low resistivity reservoir in Dongpu Depression is a result of many factors. Fine grain lithology of skeleton, high shaliness, high salinity of formation water, low reservoir height are dominant factors of low resistivity reservoirs in Dongpu Depression.