Plane‐wave decomposition of seismograms
Plane‐wave decomposition of seismograms
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DOI：
10.1190/1.1441287
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发表时间：
1982-10
期刊：
影响因子：
3.3
通讯作者：
S. Treitel;P. Gutowski;Don Wagner
中科院分区：
文献类型：
--
作者：
S. Treitel;P. Gutowski;Don Wagner
点源地震记录可以分解为任意入射角的一组平面波地震记录。这种平面波地震记录具有固有的简单结构，使它们适用于现有的反演方法，如预测反褶积。平面波分解（PWD）是在径向对称的前提下，在频率-波数域实现的。如果考虑到通常在三维介质表面上使用线性记录阵列，这个版本的PWD相当于倾斜堆叠。一种体现了运动学和动力学特性的成像原理使我们能够对平面波地震记录进行时间偏移。成像过程可以实现为一个二维滤波器，其自变量是传播时间和入射角。
A point-source seismic recording can be decomposed into a set of plane-wave seismograms for arbitrary angles of incidence. Such plane-wave seismograms possess an inherently simple structure that make them amenable to existing inversion methods such as predictive deconvolution. Implementation of plane-wave decomposition (PWD) takes place in the frequency-wavenumber domain under the assumption of radial symmetry. This version of PWD is equivalent to slant stacking if allowance is made for the customary use of linear recording arrays on the surface of a three-dimensional medium. An imaging principle embodying both kinematic as well as dynamic characteristics allows us to perform time migration of the plane-wave seismograms. The imaging procedure is implementable as a two-dimensional filter whose independent variables are traveltime and angle of incidence.