南方山前带B区地震速度建模及偏移成像

Velocity model building and migration imaging in a foothill belt area

本文针对南方山前带B区某三维地震数据,采用自主研发的iCuster地震成像系统,将偏移速度分析、沿层统计速度分析和剩余速度分析相结合,通过递进式的建模技术流程提高了速度模型的精度,改善了叠前时间偏移成像质量。

According to the characteristics of 3D seismic data in the Area B of a foothill belt in the Southern China,in the paper we use progressive velocity model building technique,combining migration velocity analysis with horizon-based statistics velocity analysis and residual velocity analysis from self-developed iCluster,a seismic imaging system,to improve the accuracy of the velocity model. This approach finally leads to an improvement of the prestack time migration image.