Least-squares reverse time migration with wavefield decomposition based on the Poynting vector
文献类型：期刊论文
| 作者 | Wang XiaoYi1,3,4; Zhang JiangJie3,4; Xu HongQiao1,3,4; Tian BaoQing1,2,4 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 64期号:2页码:645-655 |
| ISSN号 | 0001-5733 |
| 关键词 | Poynting vector Wavefield decomposition Gradient operator Least-squares reverse time migration |
| DOI | 10.6038/cjg2021O0120 |
| 英文摘要 | Because the source wavefield and receiver wavefield are constructed based on the two-way wave equation in the reverse time migration, the reflection waves developed in the back direction can cross-correlate with the normally propagating waves and generate low-frequency noises with high amplitude when the seismic waves meet the impedance interface during the wavefield extrapolation. This feature makes the least-squares migration based on reverse time migration is also disturbed by low-frequency noise during gradient calculation, which leads to slower inversion convergence. Considering the calculation amount and storage cost, we utilize the Poynting vector that represents the wave propagation direction to achieve wavefield decomposition. Then only retaining the cross-correlation between the parts of the source wavefield and the receiver wavefield in different vertical directions in the gradient calculation of the early iteration can suppress the imaging noise and improve the rate of algorithm convergence. Numerical examples verify the effectiveness of this scheme. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000617909800021 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100123]  |
| 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 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Zhang JiangJie |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang XiaoYi,Zhang JiangJie,Xu HongQiao,et al. Least-squares reverse time migration with wavefield decomposition based on the Poynting vector[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2021,64(2):645-655. |
| APA | Wang XiaoYi,Zhang JiangJie,Xu HongQiao,&Tian BaoQing.(2021).Least-squares reverse time migration with wavefield decomposition based on the Poynting vector.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,64(2),645-655. |
| MLA | Wang XiaoYi,et al."Least-squares reverse time migration with wavefield decomposition based on the Poynting vector".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 64.2(2021):645-655. |
入库方式： OAI收割
来源：地质与地球物理研究所
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