弹性波相屏传播算子大角度相位校正成像方法  

THE IMAGING METHOD WITH WIDE ANGLE PHASE CORRECTION BASED ON ELASTIC SCREEN PROPAGATOR

作　　者：郭见乐[1,2] 罗焕宏[3] 杨丽[3] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]胜利油田分公司物探研究院,山东东营257022 [3]中国石油大学(华东)地球资源与信息学院,山东青岛266555

出　　处：《物探与化探》2009年第3期304-308,共5页Geophysical and Geochemical Exploration

摘　　要：通过有限差分补偿方法对弹性波相屏传播算子进行了大角度校正,并采用矢量成像条件,即将各分量投影到极化方向,然后再成像,从而使弹性波波场中的信息得到了充分利用,解决了P-SV波成像过程中的极性不一致问题,可以将多炮的成像结果进行叠加,提高了成像质量。通过模型数据对大角度相位校正后的弹性屏延拓算子和矢量成像条件进行了试验,检验了算法的可靠性。The finite-difference compensation was applied to the wide angel correction of the elastic screen propagator, and the vector imaging condition was employed through projecting components in the direction of polarization. The information from the elastic wave field could be used efficiently, and the problem of inconsistent polarization of P-SV in imaging was solved. Partial images from different sources could be stacked to generate a final image. The elastic screen propagator with wide angel correction and the vector imaging condition were tested with the model data, which proved the reliability of this method.

关 键 词：弹性屏 矢量成像条件 全波 大角度校正 

分 类 号：P631.4[天文地球—地质矿产勘探]