Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration | |
Zhang Jian-Feng; Lu Bao-Kun; Liu Li-Nong | |
刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
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2008 | |
卷号 | 51期号:1页码:221-227 |
关键词 | wave equation based depth migration frequency-dependent varying-step depth extrapolation wavefield interpolation |
ISSN号 | 0001-5733 |
文献子类 | Article |
英文摘要 | We propose a frequency-dependent varying-step depth extrapolation scheme and a table-driven, one-point wavefield interpolation technique for the wave equation based migration methods. The former reduces the computational cost of wavefield depth extrapolation, and the latter reconstructs the extrapolated wavefield with an equal, desired vertical step with high computational efficiency. The proposed varying-step depth extrapolation plus one-point interpolation scheme results in 2/3 reduction in computational cost when compared to the conventional equal-step depth extrapolation of wavefield, but gives the almost same imaging. We present the scheme using the optimum split-step Fourier method on the 2-D Marmousi dataset and 3-D field dataset. The results demonstrate the high computational efficiency of the scheme in the absence of loss of accuracy. The proposed scheme can also be used by other wave equation based migration methods of the frequency domain. |
WOS关键词 | FINITE-DIFFERENCE MIGRATION ; FIELD EXTRAPOLATION ; FOURIER |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
出版者 | SCIENCE CHINA PRESS |
WOS记录号 | WOS:000252841900027 |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/69332] ![]() |
专题 | 中国科学院地质与地球物理研究所 |
通讯作者 | Zhang Jian-Feng |
作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang Jian-Feng,Lu Bao-Kun,Liu Li-Nong. Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(1):221-227. |
APA | Zhang Jian-Feng,Lu Bao-Kun,&Liu Li-Nong.(2008).Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(1),221-227. |
MLA | Zhang Jian-Feng,et al."Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.1(2008):221-227. |
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