叠前同步反演在建南地区含气预测中的应用

The Application of Pre-stack Simultaneous Inversion in Jian Nan Area Gas Predication

通过对岩石物理分析,建立弹性参数与储层物性参数之间的关系,得出研究区储层的最敏感弹性参数。利用叠前同步反演获得敏感弹性参数反演结果并进行反演属性分析,从纵波阻抗与纵横波速度比的交会图中得到储层指示因子,结合工区内的地质资料和储层指示因子属性来预测储层含气分布范围,结果与验证井实钻结果吻合。

This article describes the application of pre - stack simultaneous inversion technique used in the Jian Nan, Xujiahe gas reservoir identification and detection. Petro -physical analysis established the relationship between elastic parameters and reservoir physical parameters, which obtained the most sensitive elastic parameters in the study area. Using this method can get inversion results, and then inversion attribute analysis could be made. From the cross - plot of the P - wave and S - wave velocity ratio impedance factor, reservoir lithology indicator can be obtained. Combining the reservoir geological data in the work area with the reservoir lithology indicator attributecan be applied to predict reservoir gas distribution. The results are consistent with the actual drilling well. It confirmed that the inversion method is practical.