注水开发油田砂砾岩储层含油饱和度解释模型

本文利用常规测井资料,结合储层岩性、物性、含油性之间的地质规律,解决了储层岩石粒度变化及水淹层混合水电阻率变化对储层电阻率的影响;研究出了一种对电阻率测井资料标准化的校正方法;建立了储层原始、剩余、残余油饱和度解释模型。计算的储层原始、剩余、残余油地质储量,经生产验证相对下误差小于10％;计算产水率,试油验证平均绝对误差小于10％;划分水淹油层等级,试油验证符合率在80％以上。

OIL SATURATION INTERPRETATION MODEL OF SAND CONGLOMERATIC RESERVOIRS DEVELOPED BY WATERFLOODING

Using the data of conventional well logging, in combination with the geological rule of lithology, physical property and oil cut in the reservoir, the effect of changing grain size of the rock and the varied resistivity of the mixed water in watered out pay zones on the resistivity of the reservoir is solved, a correction method for standardizing the data of resistivity logs is worked out and an interpretaton model of the original, remaining and the residual oil saturations of the reservoir is established. The relative error of OOIP, remaining OIP and the residual OIP of the reservoir by calculation and the absolute error of the water cut are all less than 10%, coincidence rate of the watered out grade of the reservoir is more than 80%.