LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY
文献类型：期刊论文
| 作者 | Zhang, Hao1; Liu, Qiancheng1,2; Hao, Jun3 |
| 刊名 | JOURNAL OF SEISMIC EXPLORATION
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 26期号:2页码:183-198 |
| 关键词 | Lsrtm Linear Inversion Normal-incidence Reflection Coefficient |
| ISSN号 | 0963-0651 |
| 文献子类 | Article |
| 英文摘要 | Conventional least-squares reverse time migration (LSRTM) usually aims to improve the quality of seismic image, by removing the acquisition footprint, suppressing migration artifacts, and enhancing resolution. We find that the conventional reflectivity defined in the LSRTM is related to the normal-incidence reflection coefficient and the background velocity. Compared with the defined reflectivity, our inverted result is approximate. With reflected data, LSRTM is mainly sensitive to impedance perturbations. According to an approximate relationship between them, we reformulate the perturbation-related system into a pseudo reflection-coefficient related one. Then, we seek the inverted image through linearized iteration. With the assumption that the density varies gradually compared to the migration velocity, only the knowledge of the velocity is required, although the reflected waves are produced at impedance discontinuities. We validate our scheme using the 2D Marmousi synthetic dataset. |
| WOS关键词 | WAVE-EQUATION ; INVERSION ; VELOCITY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000400879100005 |
| 出版者 | GEOPHYSICAL PRESS |
| 资助机构 | National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007) ; National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007) ; National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007) ; National Natural Science Fund of China(41574135) ; National Major Project of China(2016ZX05008-007) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/52904]  |
| 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, Hao |
| 作者单位 | 1.Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.King Abdullah Univ Sci & Technol, Thuwal, Saudi Arabia 3.PetroChina, Res Inst Petr Explorat & Dev, Haidong, Qinghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Hao,Liu, Qiancheng,Hao, Jun. LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY[J]. JOURNAL OF SEISMIC EXPLORATION,2017,26(2):183-198. |
| APA | Zhang, Hao,Liu, Qiancheng,&Hao, Jun.(2017).LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY.JOURNAL OF SEISMIC EXPLORATION,26(2),183-198. |
| MLA | Zhang, Hao,et al."LEAST-SQUARES REVERSE-TIME MIGRATION TOWARD "TRUE" REFLECTIVITY".JOURNAL OF SEISMIC EXPLORATION 26.2(2017):183-198. |
入库方式： OAI收割
来源：地质与地球物理研究所
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