摘要
异常高压气藏产能动态预测时综合压缩系数不能忽略 ,由于工程计算中缺乏综合压缩系数实验资料或确定的方法不当 ,可大大影响预测结果的精度。在考虑了岩石压缩系数作为压力函数的基础上 ,用实测岩石压缩系数预测了高压气藏储层中不同粘土含量和KK异常高压气藏的开采特征。计算中岩石、地层水和天然气压缩系数的处理方法 :高压阶段以岩石的弹性能量为主 ,其对产能的贡献占5 0 %以上 ,而常压阶段 ,以天然气的弹性能量为主 ,岩石压缩系数变化很小 ,可认为是常数 ;地层水的压缩系数变化不大其值较小 ,可看作常数或忽略 ;粘土含量对岩石压缩系数影响较大 。
The comprehensive compressibility cannot be ignored in the dynamic prediction of the productivity of abnormally high pressured gas reservoir. The absence of the experimental data of the comprehensive compressibility and the wrong method in the engineering calculation may strongly affect the accuracy of the prediction. This paper considers the rock compressibility as the pressure function, and uses the measured rock compressibility to predict the clay content and production characteristic of high pressured gas reservoir. The method for calculating the compressibility of rock, formation water and natural gas can provide evidence for the productivity prediction of abnormally high pressured gas reservoir.
出处
《大庆石油地质与开发》
CAS
CSCD
2002年第4期39-40,51,共3页
Petroleum Geology & Oilfield Development in Daqing
