Wave-field transformations of vertical seismic profiles
Wave-field transformations of vertical seismic profiles
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DOI：
10.1190/1.1442305
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发表时间：
1987-03
期刊：
影响因子：
3.3
通讯作者：
Liang-zie Hu;G. McMechan
中科院分区：
文献类型：
--
作者：
Liang-zie Hu;G. McMechan
垂直地震剖面（VSP）数据可以通过应用波场变换以各种方式进行划分。这些转换提供了对数据性质的深入了解，并有助于设计处理操作。变换以可逆序列实施，将观察到的VSP数据从深度-时间（z-t）域通过慢度-时间截点（p-τ）域（通过倾斜叠加），到慢度-频率（p-ω）域（通过τ上的一维傅立叶变换），到波数-频率（k-ω）域（通过使用傅立叶中心切片定理重新计算），最后回到z-t域（通过逆2-D傅立叶变换）。多维波场变换与k-ω、p-ω和p-τ滤波相结合，可以应用于波场重建、内插和外推; P波和S波的分离;上行波和下行波的分离;以及波场分解以隔离、识别和分析波至。
Vertical seismic profile (VSP) data may be partitioned in a variety of ways by application of wave‐field transformations. These transformations provide insights into the nature of the data and aid in the design of processing operations. Transformations are implemented in a reversible sequence that takes the observed VSP data from the depth‐time (z-t) domain through the slowness‐time intercept (p-τ) domain (by a slant stack), to the slowness‐frequency (p-ω) domain (by a 1-D Fourier transform over τ), to the wavenumber‐frequency (k-ω) domain (by resampling using the Fourier central‐slice theorem), and finally back to the z-t domain (by an inverse 2-D Fourier transform). Multidimensional wave‐field transformations, combined with k-ω, p-ω, and p-τ filtering, can be applied to wave‐field resampling, interpolation, and extrapolation; separation of P-waves and S-waves; separation of upgoing and downgoing waves; and wave‐field decomposition for isolation, identification, and analysis of arrivals.