Recursive prestack depth migration using CFP gathers
Recursive prestack depth migration using CFP gathers
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DOI：
10.1190/1.2348517
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发表时间：
2006-11
期刊：
影响因子：
3.3
通讯作者：
J. Thorbecke;Cray A J Berkhout
中科院分区：
文献类型：
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作者：
J. Thorbecke;Cray A J Berkhout
共聚焦点技术（CFP）通过发射和检测两个步骤聚焦来描述叠前偏移。第一聚焦步骤的输出表示CFP道集。该道集定义了一个炮点记录，该记录表示由聚焦震源波场产生的地下响应。本文提出将递归炮点记录深度偏移算法应用于地震数据体的CFP道集，并将这一过程称为CFP道集偏移。在复杂地质和低信噪比条件下，基于CFP的成像道集比常规成像道集更容易进行非对齐解释。这使得基于CFP的图像道集更适合于速度分析。这个重要的属性说明了Marmousi模型的例子。
The common-focus-point technology (CFP) describes prestack migration by focusing in two steps: emission and detection. The output of the first focusing step represents a CFP gather. This gather defines a shot record that represents the subsurface response resulting from a focused source wavefield. We propose applying the recursive shot-record, depth-migration algorithm to the CFP gathers of a seismic data volume and refer to this process as CFP-gather migration. In the situation of complex geology and/or low signal-to-noise ratio, CFP-based image gathers are easier to interpret for nonalignment than the conventional image gathers. This makes the CFP-based image gathers better suited for velocity analysis. This important property is illustrated by examples on the Marmousi model.