Computational methods for large-scale 3D acoustic finite-difference modeling: A tutorial
Computational methods for large-scale 3D acoustic finite-difference modeling: A tutorial
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DOI：
10.1190/1.2753753
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发表时间：
2007-08
期刊：
影响因子：
3.3
通讯作者：
J. Etgen;M. Obrien
中科院分区：
文献类型：
--
作者：
J. Etgen;M. Obrien
我们提出了一套三维声波方程的波场建模方法。这些建模方法的主要应用是研究采集设计，多次波抑制和盐下成像的表面拖缆和海底记录的几何形状。我们展示了如何使用有限的计算机内存，通常使用一个工作站，导致运行时间的顺序上的几个CPU小时的CPU天在三维空间中的声波方程建模。所提出的核外方法的结构还用于提高核内建模的效率，其中存储器到高速缓存到存储器的数据流基本上与核外方法的数据流相同。从弹性波方程出发，我们开发了一种矢量声学算法，能够有效地模拟多分量数据在声学介质中。我们表明，从这个矢量声学算法的数据可以用来测试上行/下行分离的P波记录的海底地震…
We present a set of methods for modeling wavefields in three dimensions with the acoustic-wave equation. The primary applications of these modeling methods are the study of acquisition design, multiple suppression, and subsalt imaging for surface-streamer and ocean-bottom recording geometries. We show how to model the acoustic wave equation in three dimensions using limited computer memory, typically using a single workstation, leading to run times on the order of a few CPU hours to a CPU day. The structure of the out-of-core method presented is also used to improve the efficiency of in-core modeling, where memory-to-cache-to-memory data flow is essentially the same as the data flow for an out-of-core method. Starting from the elastic-wave equation, we develop a vector-acoustic algorithm capable of efficiently modeling multicomponent data in an acoustic medium. We show that data from this vector-acoustic algorithm can be used to test upgoing/downgoing separation of P-waves recorded by ocean-bottom seismic...