Application of velocity modeling and reverse time migration to subsalt structure
文献类型：期刊论文
| 作者 | Liu Wen-Qing1; Wang Xi-Wen; Liu Hong2; Wang Yu-Chao; Wang Xiao; Zeng Hua-Hui; Shao Xi-Chun |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2013-02-01 |
| 卷号 | 56期号:2页码:616-625 |
| 关键词 | Salt Dome Layer Controlled Modeling Multi-information Constraints Reverse Time Migration Wave Equation Gpu/cpu Co-operating Parallel Computation |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20130225 |
| 文献子类 | Article |
| 英文摘要 | Velocity modeling and imaging of salt domes are bottlenecks in subsalt reservoir exploration. Because of large velocity variance between salt domes and surrounding rocks and large thickness changing in spatial direction, many problems are present in subsalt seismic exploration, such as seismic wave filed complexity, and structural distortion in time domain. According to the complex geological characters of Area H, we can learn more about the subsalt reservoirs through technological innovation. As to the difficulties of salt velocity modeling, this paper proposes an idea called "multi-information constrained layer-bound solid modeling technique", which uses sequential Gauss simulation and CVI method to solve velocity anomalies in subsalt structure, and can remarkably improve the precision of velocity modeling. As to the complex subsalt structure imaging, through studying based on the finite difference method, this paper proposes a precise and efficient finite difference scheme for reverse-time wave field extrapolation. Based on GPU/CPU cooperating system, we extrapolate the wave field forwardly and reversely in time domain that needs the maximum amount of calculation through GPU. This paper adopts reverse time migration in depth domain, which can precisely image the reflected waves from steep dip (even exceeding 90 degrees in the adjacent beds of a salt dome). By the theoretical test of salt dome model, we verify the correctness of the algorithms and methods mentioned above. Through the reverse time migration method, we solve the problem of imaging sub-salt structure and the adjacent beds, so we can migrate the salt dome and the adjacent beds to their true positions, and eliminate structure distortion of underlying beds in time domain due to the velocity anomaly of the salt dome. So fnianlly we can get precise migration results of sub-salt structure in depth domain. |
| WOS关键词 | EXTRAPOLATION ; GPU |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000315762400025 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86487]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu Wen-Qing |
| 作者单位 | 1.Chengdu Univ Technol, Chengdu 610059, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu Wen-Qing,Wang Xi-Wen,Liu Hong,et al. Application of velocity modeling and reverse time migration to subsalt structure[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(2):616-625. |
| APA | Liu Wen-Qing.,Wang Xi-Wen.,Liu Hong.,Wang Yu-Chao.,Wang Xiao.,...&Shao Xi-Chun.(2013).Application of velocity modeling and reverse time migration to subsalt structure.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(2),616-625. |
| MLA | Liu Wen-Qing,et al."Application of velocity modeling and reverse time migration to subsalt structure".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.2(2013):616-625. |
入库方式： OAI收割
来源：地质与地球物理研究所
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