Prestack time migration of nonplanar data: Improving topography prestack time migration with dip-angle domain stationary-phase filtering and effective velocity inversion
文献类型：期刊论文
| 作者 | Xu, Jincheng; Zhang, Jianfeng |
| 刊名 | GEOPHYSICS
 |
| 出版日期 | 2017-05-01 |
| 卷号 | 82期号:3页码:S235-S246 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/GEO2016-0087.1 |
| 文献子类 | Article |
| 英文摘要 | We have developed a modified prestack time migration (PSTM) approach that can directly image nonplanar data by using two effective velocity parameters above and below a datum. The proposed extension improves the so-called topography PSTM by introducing a dip-angle domain stationary-phase migration (or filtering) and combining effective velocity inversion with the residual static corrections. The stationary-phase migration to constrain the imaging aperture within Fresnel zones significantly improves the signal-to-noise ratio (S/N) of the image gathers, especially in the presence of steeply dipping structures. This helps to extract an accurate residual moveout from the common shot and receiver image gathers, and the surface-consistent residual statics hidden in these image gathers can be simultaneously obtained from an inversion process. As a result, the final migrated images show higher S/N and are better focused than the conventional topography PSTM. The proposed technique can handle rugged topography, especially in the presence of high near-surface velocities, without the need for prior elevation static corrections. The SEG foothills overthrust model and a real data set acquired on a piedmont zone are used to validate the modified topography PSTM. Synthetic and field data examples are obtained with good results. |
| WOS关键词 | IRREGULAR SURFACES ; LAND DATA ; EXTRAPOLATION ; APERTURE ; STACK |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| WOS记录号 | WOS:000403712600007 |
| 资助机构 | National Natural Science Fund of China(41330316) ; National Natural Science Fund of China(41330316) ; National Natural Science Fund of China(41330316) ; National Natural Science Fund of China(41330316) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/61864]  |
| 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 | Xu, Jincheng |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Jincheng,Zhang, Jianfeng. Prestack time migration of nonplanar data: Improving topography prestack time migration with dip-angle domain stationary-phase filtering and effective velocity inversion[J]. GEOPHYSICS,2017,82(3):S235-S246. |
| APA | Xu, Jincheng,&Zhang, Jianfeng.(2017).Prestack time migration of nonplanar data: Improving topography prestack time migration with dip-angle domain stationary-phase filtering and effective velocity inversion.GEOPHYSICS,82(3),S235-S246. |
| MLA | Xu, Jincheng,et al."Prestack time migration of nonplanar data: Improving topography prestack time migration with dip-angle domain stationary-phase filtering and effective velocity inversion".GEOPHYSICS 82.3(2017):S235-S246. |
入库方式： OAI收割
来源：地质与地球物理研究所
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