强水敏储层低电阻油层的识别

Reservoir Recognition by Using Resistivity in Strong Water Sensitive Reservoirs

车2井区齐古组油藏,储层粘土矿物含量相对较高,具有强水敏低电阻出油的特点。分析了低阻出油的原因,含油饱和度解释模型引入了变地层水电阻率,油层识别图版引入了Rw/Rt参数,解决了“低阻油层”识别的难题。

In the reservoirs of Qigu Formation in Wellblock Che2,clay minerals are relatively higher,and it has the character of strong water sensitivity and low resistivity oil production.The cause of low resistivity oil production is analyzed,models for oil saturation interpretation are introduced in variable formation water resistivity and a chartboard for reservoir recognition is introduced into R_w/R_t parameters,by which the problem of 'low resistivity reservoir' recognition is solved.