Separating P- and S-waves in prestack elastic seismograms using the equivalent form of elastic wave equation
文献类型：期刊论文
| 作者 | Li, Zhiyuan1,2; Gu, Bingluo1,2,3; Ma, Xiaona1,2,3; Liang, Guanghe1,2 |
| 刊名 | JOURNAL OF APPLIED GEOPHYSICS
 |
| 出版日期 | 2015-03-01 |
| 卷号 | 114页码:210-223 |
| 关键词 | Vector Separation P- And S-wave Separated Elastic Equation Wavefield Extrapolation |
| DOI | 10.1016/j.jappgeo.2015.01.018 |
| 文献子类 | Article |
| 英文摘要 | Based on the Helmholtz decomposition, P- and S-waves in isotropic media can be separated by using divergence and curl operators. However, divergence and curl operators cannot be used directly for the wavefield separation of surface seismograms, because their first vertical derivatives are incalculable. An approach to solve this problem is combining elastic full wavefield extrapolation and wave-type separation using divergence and curl operators. It includes three steps: (1) downward extrapolate the elastic data from the surface to a reference depth, (2) separate the P- and S-waves by calculating the divergence and curl of the full elastic wavefield at the reference depth, and (3) upward extrapolate the separated P- and S-waves back to the surface, respectively. However, the phase and the P-S amplitude ratio are changed, after the divergence and curl calculations. So the phase correction and amplitude balancing need to be done after the separation. In this paper, after the above step (1), the P- and S-wave separated elastic equation, which is the equivalent form of the conventional elastic wave equation, are used to upward extrapolate the downward extrapolated wavefield back to the surface. The P- and S-waves are separated naturally during the extrapolation, and their phase and amplitude are the same as the preseparation. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS关键词 | SEISMIC DATA ; DEPTH MIGRATION ; VTI MEDIA ; DECOMPOSITION ; FIELD ; 2D ; DIVERGENCE ; DOMAIN ; CURL |
| WOS研究方向 | Geology ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000351247500020 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62568]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhiyuan,Gu, Bingluo,Ma, Xiaona,et al. Separating P- and S-waves in prestack elastic seismograms using the equivalent form of elastic wave equation[J]. JOURNAL OF APPLIED GEOPHYSICS,2015,114:210-223. |
| APA | Li, Zhiyuan,Gu, Bingluo,Ma, Xiaona,&Liang, Guanghe.(2015).Separating P- and S-waves in prestack elastic seismograms using the equivalent form of elastic wave equation.JOURNAL OF APPLIED GEOPHYSICS,114,210-223. |
| MLA | Li, Zhiyuan,et al."Separating P- and S-waves in prestack elastic seismograms using the equivalent form of elastic wave equation".JOURNAL OF APPLIED GEOPHYSICS 114(2015):210-223. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。