利用测井曲线预测地层压力

塔里木盆地各油田间相距较远,地层压力相差较大,同一口井也有多套压力体系,不同体系间压力相差较大。用现有的方法预测地层压力,有的误差都超过100%。经分析,组合测井的井径、自然电位、自然伽马、电阻率、声波等资料基本上反应了地层的综合物理性质,据此,建立了预测地层压力的新模式。经实际验证,除个别异常压力过大的点误差超过10%外,其余都小于10%,预测精度较高,可满足工程要求。该方法最大的特点是资料来源可靠,对过去的资料没有依赖性,不受岩性影响,可预测非连续沉积地层的地层压力。

A NEW METHOD FOR ABNORMAL PRESSURE PREDICTION IN UNCONTINUOUS SEDIMENTARY FORMATION

This paper summarizes briefly a new method for overpressure prediction in uncontinuous Sedimentary formation. The method which makes full use of the data of combination logging to detect the overpressure. It introduces the distinguishing features and computing modes of this method. Applications of several wells in Talim Basin show that the method adapts to the complicated pressure system in Talim: high - pressure gradient, the big differential of pressure gradient in same profile.