Viscoacoustic least-squares migration with a blockwise Hessian matrix: an effective Q approach
文献类型：期刊论文
| 作者 | Song, Mingpeng2,3,4; Zhang, Jianfeng1; Zhang, Jiangjie2,3,4 |
| 刊名 | JOURNAL OF GEOPHYSICS AND ENGINEERING
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 17期号:4页码:618-634 |
| 关键词 | high-resolution imaging least-squares migration effective Q seismic attenuation Hessian matrix |
| ISSN号 | 1742-2132 |
| DOI | 10.1093/jge/gxaa017 |
| 英文摘要 | We present an explicit inverse approach using a Hessian matrix for least-squares migration (LSM) with Q compensation. The scheme is developed by incorporating an effective Q-based solution of the viscoacoustic wave equation into a blockwise approximation to the Hessian in LSM, which is implemented after the so-called deabsorption prestack time migration (PSTM). The effective Q model used fully accounts for frequency-dependent traveltime and amplitude at the same imaging location. We can extract the effective Q parameters by scanning during previous deabsorption PSTM. This avoids the challenging task of building the Q model. The blockwise Hessian matrix approach decomposes the full Hessian matrix into a series of computationally tractable small-sized matrices using a localised approach. We derive the explicit formula of the offset-dependent Hessian matrix using an analytical Green's function obtained from deabsorption PSTM. In this way, we can approximate a reflectivity imaging for the targeted zone by a spatial deconvolution of the migrated result with an explicit inverse. The resulting scheme broadens the frequency-band of imaging by deabsorption, and improves the subsurface illumination and spatial resolution through the inverse Hessian. A high-resolution, true-amplitude migrated gather can then be obtained. Synthetic and field data sets demonstrate the proposed blockwise LS-QPSTM. |
| WOS关键词 | PRESTACK DEPTH-MIGRATION ; WAVE-PROPAGATION ; COMPENSATION ; ABSORPTION ; EXTRAPOLATION ; INVERSION |
| 资助项目 | National Natural Science Foundation of China[41604120] ; National Major Project of China[2017ZX05008-007] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000591576700005 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98736]  |
| 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, Jianfeng |
| 作者单位 | 1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Mingpeng,Zhang, Jianfeng,Zhang, Jiangjie. Viscoacoustic least-squares migration with a blockwise Hessian matrix: an effective Q approach[J]. JOURNAL OF GEOPHYSICS AND ENGINEERING,2020,17(4):618-634. |
| APA | Song, Mingpeng,Zhang, Jianfeng,&Zhang, Jiangjie.(2020).Viscoacoustic least-squares migration with a blockwise Hessian matrix: an effective Q approach.JOURNAL OF GEOPHYSICS AND ENGINEERING,17(4),618-634. |
| MLA | Song, Mingpeng,et al."Viscoacoustic least-squares migration with a blockwise Hessian matrix: an effective Q approach".JOURNAL OF GEOPHYSICS AND ENGINEERING 17.4(2020):618-634. |
入库方式： OAI收割
来源：地质与地球物理研究所
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