An angle-domain imaging condition for elastic reverse time migration and its application to angle gather extraction
An angle-domain imaging condition for elastic reverse time migration and its application to angle gather extraction
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DOI：
10.1190/geo2011-0455.1
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发表时间：
2012-08
期刊：
影响因子：
3.3
通讯作者：
Rui Yan;Xiao-Bi Xie
中科院分区：
文献类型：
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作者：
Rui Yan;Xiao-Bi Xie
摘要 推荐采用角域成像条件进行多分量弹性逆时偏移。局部倾斜叠加法用于将源波和接收波分离为纵波和横波，并同时分解为沿不同传播方向的局部平面波。我们通过互相关入射和散射平面 P 波和 S 波的每种可能的组合来计算角域部分图像，然后将它们组织成 P-P 和 P-S 局部图像矩阵。局部图像矩阵保留了与地震事件相关的所有角度信息。因此，通过在图像矩阵中工作，可以方便地执行不同的角域操作（例如，过滤伪影、校正极性或进行照明和采集孔径补偿）。由于局部图像矩阵在空间中局部化，因此这些操作可以设计得高度灵活，例如面向目标、倾角相关或反射角相关。执行角域后...
ABSTRACTAn angle-domain imaging condition is recommended for multicomponent elastic reverse time migration. The local slant stack method is used to separate source and receiver waves into P- and S-waves and simultaneously decompose them into local plane waves along different propagation directions. We calculated the angle-domain partial images by crosscorrelating every possible combination of the incident and scattered plane P- and S-waves and then organized them into P-P and P-S local image matrices. Local image matrix preserves all the angle information related to the seismic events. Thus, by working in the image matrix, it is convenient to perform different angle-domain operations (e.g., filtering artifacts, correcting polarity, or conducting illumination and acquisition aperture compensations). Because local image matrix is localized in space, these operations can be designed to be highly flexible, e.g., target-oriented, dip-angle-dependent or reflection-angle-dependent. After performing angle-domain ...