Elastic Correlative Least-Squares Reverse Time Migration Based on Wave Mode Decomposition
文献类型：期刊论文
| 作者 | Zheng, Yue1; Liu, Youshan1; Xu, Tao1; Li, Zhiyuan2 |
| 刊名 | PROCESSES
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 10期号:2页码:19 |
| 关键词 | reverse time migration least-squares migration wave mode decomposition reflectivity heterogeneous |
| DOI | 10.3390/pr10020288 |
| 英文摘要 | The conventional elastic least-squares reverse time migration (LSRTM) generally inverts the parameter perturbation of the model rather than the reflectivity of reflected P- and S-modes, which leads to difficulty in directly interpreting the physical properties of the subsurface media. However, an accurate velocity model that is needed by the separation of seismic records of conventional LSRTM is usually unavailable in real data, which limits its application. In this study, we introduce a new practical correlative LSRTM (CLSRTM) scheme based on wave mode decomposition without amplitude and phase distortion, which frees from separation of seismic records. In this study, we deduced the migration and the de-migration operators using the decoupled P- and S-wave equations in heterogeneous media, which needs no extra wavefield decomposition in simulated data. To accelerate the convergence and improve the efficiency of the inversion, we adopted an analytical step-length formula that can be incidentally computed during the necessary de-migration process and the L-BFGS algorithm. Two numerical examples demonstrate that the proposed method can compensate the energy of deep structures, and generate clear images with balanced amplitudes and enhanced resolution even for the fault structures beneath the salt dome. |
| WOS关键词 | FIELD-SEPARATION ; FORM INVERSION ; VECTOR |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000764833900001 |
| 出版者 | MDPI |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/104964]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 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 |
| 通讯作者 | Liu, Youshan |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Yue,Liu, Youshan,Xu, Tao,et al. Elastic Correlative Least-Squares Reverse Time Migration Based on Wave Mode Decomposition[J]. PROCESSES,2022,10(2):19. |
| APA | Zheng, Yue,Liu, Youshan,Xu, Tao,&Li, Zhiyuan.(2022).Elastic Correlative Least-Squares Reverse Time Migration Based on Wave Mode Decomposition.PROCESSES,10(2),19. |
| MLA | Zheng, Yue,et al."Elastic Correlative Least-Squares Reverse Time Migration Based on Wave Mode Decomposition".PROCESSES 10.2(2022):19. |
入库方式： OAI收割
来源：地质与地球物理研究所
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