Radon transform wave field separation for vertical seismic profiling data
Radon transform wave field separation for vertical seismic profiling data
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DOI：
10.1190/1.1442151
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发表时间：
1986-04
期刊：
影响因子：
3.3
通讯作者：
W. Moon;A. Carswell;R. Tang;C. Dillistone
中科院分区：
文献类型：
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作者：
W. Moon;A. Carswell;R. Tang;C. Dillistone
垂直地震剖面法（VSP）所获得的资料在解释前需要进行特殊的处理。一个重要的步骤是通过应用f-k速度滤波器和直达波的静音来分离上行和下行信号。类似地，如果VSP剖面被变换到p-τ平面，则上行和下行波场变得可分离，因为它们根据它们的倾角映射到不同的p-τ象限。这允许通过在p-τ平面中开窗之后应用逆拉东变换来重建任一波场。用Radon变换波场分离法（RTWS）得到的结果与用f-k速度滤波法得到的结果相似。然而，通过在正演倾斜叠加中实施振幅比测试滤波器，重建波场的质量得到了很大改善。对于正向转换中的特定范围的p堆栈值，此过滤器通过测试它们的一致性来排序并从所需事件中删除不需要的事件。
The data obtained by the vertical seismic profiling (VSP) method require unique processing before interpretation. An important step is the separation of upgoing and downgoing signals by application of an f-k velocity filter and muting of the direct wave. Similarly, if the VSP section is transformed to the p-τ plane, the upgoing and downgoing wave fields become separable because they map to different p-τ quadrants according to their dips. This allows either wave field to be reconstructed by application of the inverse Radon transform after windowing in the p-τ plane. Results obtained by the Radon transform wave field separation (RTWS) method are similar to those obtained by f-k velocity filtering. However, by implementing an amplitude‐ratio testing filter in the forward slant stack, the quality of the reconstructed wave field is much improved. For a specific range of p-stack values in the forward transform, this filter sorts and removes the unwanted events from the desired ones by testing their consistency ...