Wave equation processing using finite-difference propagators, Part 1: Wavefield dissection and imaging of marine multicomponent seismic data
Wave equation processing using finite-difference propagators, Part 1: Wavefield dissection and imaging of marine multicomponent seismic data
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DOI：
10.1190/geo2014-0151.1
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发表时间：
2014-09
期刊：
影响因子：
3.3
通讯作者：
L. Amundsen;J. Robertsson
中科院分区：
文献类型：
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作者：
L. Amundsen;J. Robertsson
【摘要】波场注入方法主要应用于弹丸集的逆时外推。为了正确地注入记录数据而不造成传播方向的模糊性，波场注入方法需要压力和粒子速度数据，如多分量拖曳海洋或海底地震记录。我们发现，通过仔细考虑注入模型（介质参数和边界条件），多分量数据的波场注入也可以用来解决传统时-空域有限差分传播器处理海洋地震数据的几个长期挑战。我们概述并演示了几个重要的应用，包括波场的上下分离（去重影）、直接波去除、源特征估计、多重去除以及使用原色和多重成像。只考虑声学模型，但概念是直截了当的一般…
ABSTRACTMethods for wavefield injection are used in, for instance, reverse time extrapolation of shot gathers in reverse time migration. For correct injection of recorded data without any ambiguity of the propagation direction, the wavefield-injection methodology requires pressure and particle velocity data such as multicomponent towed marine or seabed seismic recordings. We discovered that by carefully considering the models (medium parameters and boundary conditions) for injection, wavefield injection of multicomponent data can also be used to solve several long-standing challenges in marine seismic data processing by means of conventional time-space-domain finite-difference propagators. We outlined and demonstrated several of these important applications including up-down separation of wavefields (deghosting), direct-wave removal, source-signature estimation, multiple removal, and imaging using primaries and multiples. Only acoustic models are considered, but the concepts are straightforward to general...