Phase-encoding-based reverse time migration of multiples
文献类型：期刊论文
| 作者 | Zhang, YanBao3; Liu, YiKe1; Yi, Jia2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 66期号:5页码:2138-2150 |
| ISSN号 | 0001-5733 |
| 关键词 | Multiple imaging Reverse time migration Random phase encoding strategy |
| DOI | 10.6038/cjg2022Q0642 |
| 英文摘要 | Reverse time migration of multiples (RTMM) can supply migration results with wider illumination and broader wavenumber spectra than conventional reverse time migration (RTM) of primaries. However, crosstalk artifacts caused by interferences between unrelated multiples severely degrade the imaging quality of multiples. To address the crosstalk problems, RTM using controlled-order multiples (RTM-CM) was proposed. In RTM-CM, different-order multiples are first isolated using the multiples decomposition strategy, followed by migration procedures of consecutive-order multiples. By exploiting RTM-CM, most energetic crosstalks can be significantly eliminated. However, N individual migrations need to be conducted for staking in RTM-CM, thereby causing an N-fold increase in computational costs, in which N is the maximum order of considered multiples. To reduce computation costs and inherit the benefits of controlled-order multiple imaging, we developed a phase-encoding-based migration approach for multiples. This method first phase encodes different-order multiples by randomly modifying time shifts and polarity reversals. And then the encoded multiples with orders of 0 to N -1 are stacked to form the forward-propagating supergathers, whereas the backward-propagating supergathers comprise encoded multiples with orders of 1 to N. Finally, by using supergathers, the proposed approach can simultaneously accomplish migrations of all isolated-order multiples, which significantly improves computational efficiency. Numerical examples on two synthetic and one field datasets corroborate that the proposed approach can considerably enhance imaging quality by suppressing crosstalks and reducing computational costs. |
| WOS关键词 | FREE-SURFACE MULTIPLES ; ELIMINATION ; PREDICTION ; ARTIFACTS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000980837100026 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110919]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Zhang, YanBao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.China Earthquake Disaster Prevent Ctr, Beijing 100029, Peoples R China 3.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, YanBao,Liu, YiKe,Yi, Jia. Phase-encoding-based reverse time migration of multiples[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2023,66(5):2138-2150. |
| APA | Zhang, YanBao,Liu, YiKe,&Yi, Jia.(2023).Phase-encoding-based reverse time migration of multiples.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,66(5),2138-2150. |
| MLA | Zhang, YanBao,et al."Phase-encoding-based reverse time migration of multiples".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 66.5(2023):2138-2150. |
入库方式： OAI收割
来源：地质与地球物理研究所
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