Automatic migration velocity estimation for prestack time migration
文献类型：期刊论文
| 作者 | Dong, Chunhui1; Wang, Shangxu1; Zhang, Jianfeng2; Ma, Jingsheng3; Zhang, Hao2 |
| 刊名 | GEOPHYSICS
 |
| 出版日期 | 2019-05-01 |
| 卷号 | 84期号:3页码:U1-U11 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/GEO2018-0254.1 |
| 英文摘要 | Migration velocity analysis is a labor-intensive part of the iterative prestack time migration (PSTM) process. We have developed a velocity estimation scheme to improve the efficiency of the velocity analysis process using an automatic approach. Our scheme is the numerical implementation of the conventional velocity analysis process based on residual moveout analysis. The key aspect of this scheme is the automatic event picking in the common-reflection point (CRP) gathers, which is implemented by semblance scanning trace by trace. With the picked traveltime curves, we estimate the velocities at discrete grids in the velocity model using the least-squares method, and build the final root-mean-square (rms) velocity model by spatial interpolation. The main advantage of our method is that it can generate an appropriate rms velocity model for PSTM in just a few iterations without manual manipulations. In addition, using the fitting curves of the picked events in a range of offsets to estimate the velocity model, which is fitting to a normal moveout correction, can prevent our scheme from the local minima issue. The Sigsbee2B model and a field data set are used to verify the feasibility of our scheme. High-quality velocity model and imaging results are obtained. Compared with the computational cost to generate the CRP gathers, the cost of our scheme can be neglected, and the quality of the initial velocity is not critical. |
| WOS关键词 | REFLECTION-SURFACE STACK ; INVERSION ; GATHERS ; IMAGE |
| 资助项目 | National Natural Science Fund of China[41330316] ; National Natural Science Fund of China[41804129] ; National Basic Research Program of China[2013CB228600] ; State Scholarship Fund of China[201706445007] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000468946700035 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| 资助机构 | National Natural Science Fund of China ; National Natural Science Fund of China ; National Basic Research Program of China ; National Basic Research Program of China ; State Scholarship Fund of China ; State Scholarship Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Basic Research Program of China ; National Basic Research Program of China ; State Scholarship Fund of China ; State Scholarship Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Basic Research Program of China ; National Basic Research Program of China ; State Scholarship Fund of China ; State Scholarship Fund of China ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Basic Research Program of China ; National Basic Research Program of China ; State Scholarship Fund of China ; State Scholarship Fund of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/92274]  |
| 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 | Dong, Chunhui |
| 作者单位 | 1.China Univ Petr, State Key Lab Petr Resources & Prospecting, CNPC Key Lab Geophys Explorat, Beijing 102249, Peoples R China 2.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Heriot Watt Univ, Inst Petr Engn, Edinburgh EH14 4AS, Midlothian, Scotland |
| 推荐引用方式 GB/T 7714 | Dong, Chunhui,Wang, Shangxu,Zhang, Jianfeng,et al. Automatic migration velocity estimation for prestack time migration[J]. GEOPHYSICS,2019,84(3):U1-U11. |
| APA | Dong, Chunhui,Wang, Shangxu,Zhang, Jianfeng,Ma, Jingsheng,&Zhang, Hao.(2019).Automatic migration velocity estimation for prestack time migration.GEOPHYSICS,84(3),U1-U11. |
| MLA | Dong, Chunhui,et al."Automatic migration velocity estimation for prestack time migration".GEOPHYSICS 84.3(2019):U1-U11. |
入库方式： OAI收割
来源：地质与地球物理研究所
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