基于有效应力影响的岩石物理建模研究

Petrophysical modeling based on effective stress effects

研究工区W区块位于四川盆地南部,目标储层埋藏较深,普遍大于3500m,自北向南深度逐渐增加,地层压力系数较高。从有效应力与孔隙纵横比的关系出发,结合测井资料、实验数据等进行岩石物理建模,最后通过建立的岩石物理模型进行速度预测,预测结果与实际测井资料吻合较好,验证了模型的有效性和准确性。

The research work area W block is located in the southern part of the Sichuan Basin,the target reservoir is buried deeply,generally greater than 3500m,and the depth gradually increases from north to south,with a high formation pressure coefficient.This study starts from the relationship between effective stress and pore aspect ratio,and combines logging data and experimental data to conduct petrophysical modeling.Finally,use the established petrophysical model to predict velocity,which is in good agreement with the actual logging data and verifies the validity and accuracy of the model.