VSP wave separation by adaptive masking filters

VSP wave separation by adaptive masking filters
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通过自适应掩蔽滤波器分离 VSP 波

DOI:
10.1088/1742-2132/13/3/412
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发表时间:
2016-05
影响因子:
1.4
通讯作者:
Wang Yanghua
Wang Yanghua
中科院分区:
地球科学4区
文献类型:
--
作者:
Rao Ying;Wang Yanghua

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在垂直地震剖面(VSP)资料处理中,第一步可能是分离下行波场和上行波场。当使用屏蔽滤波器分离VSP波时,上行波的两个终端存在困难。一个关键的挑战是屏蔽过滤器如何恢复能量尾部,与这些终止相关的边缘效应唯一地存在于VSP数据中。一种有效的策略是在τ-p域和f-k域中顺序实现掩蔽滤波器。同时,它使用中值滤波,产生干净但平滑的下行波场版本,用作设计掩蔽滤波器的参考数据集。掩蔽过滤器是自适应和迭代地实现的,逐渐恢复任何手术静音切断的能量尾巴。当τ-p和f-k域屏蔽滤波针对不同深度范围的VSP时,这种组合策略可以准确地从现场VSP数据中分离出波。
In vertical seismic profiling (VSP) data processing, the first step might be to separate the down-going wavefield from the up-going wavefield. When using a masking filter for VSP wave separation, there are difficulties associated with two termination ends of the up-going waves. A critical challenge is how the masking filter can restore the energy tails, the edge effect associated with these terminations uniquely exist in VSP data. An effective strategy is to implement masking filters in both τ-p and f-k domain sequentially. Meanwhile it uses a median filter, producing a clean but smooth version of the down-going wavefield, used as a reference data set for designing the masking filter. The masking filter is implemented adaptively and iteratively, gradually restoring the energy tails cut-out by any surgical mute. While the τ-p and the f-k domain masking filters target different depth ranges of VSP, this combination strategy can accurately perform in wave separation from field VSP data.
DOI: 10.3997/2214-4609.20131840
发表时间: 2013-10
期刊: --
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