Sub-triangle shooting ray-tracing in complex 3D VTI media
文献类型：期刊论文
| 作者 | Xu, Tao1; Zhang, Zhongjie1; Zhao, Aihua2; Zhang, Anjia1; Zhang, Xi1; Zhang, Hongshuang1 |
| 刊名 | JOURNAL OF SEISMIC EXPLORATION
 |
| 出版日期 | 2008-04-01 |
| 卷号 | 17期号:2-3页码:133-146 |
| 关键词 | phase velocity group velocity Snell's law ray-tracing |
| ISSN号 | 0963-0651 |
| 文献子类 | Article |
| 英文摘要 | We model a complex 3D anisotropic structure as an aggregate of arbitrarily shaped blocks or volumes separated by triangulated interfaces, and different anisotropic parameters can be defined in different blocks. In anisotropic media, seismic wave travels in the direction of ray vectors with group velocities throughout a ray trajectory, therefore, group velocities expressed by ray angles is required, but difficult to express in terms of phase angles. An approximate expression in terms of ray angles is derived for weak transversely isotropic media with a vertical symmetry axis (VTI). We also propose a simple iterative process to calculate ray angles in terms of the Snell's law still valid for phase velocities and phase angles. Modification of shooting angles is crucial in implementing 3D shooting ray-tracing, and we suggest to use the sub-triangle shooting method to update the shooting angles to enhance the computing efficiency. Numerical tests demonstrate that a blocky model can be a good description of complex 3D VTI media and the sub-triangle shooting ray-tracing is very effective to implement for kinematics two-point ray-tracing. |
| WOS关键词 | TRANSVERSELY ISOTROPIC MEDIA ; TRAVEL-TIME COMPUTATION ; ANISOTROPIC MEDIA ; HETEROGENEOUS MEDIA ; 3-D MEDIA ; REFLECTION ; INVERSION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000256224700003 |
| 出版者 | GEOPHYSICAL PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69622]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu, Tao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosphere Evolut, Beijing 100864, Peoples R China 2.China Earthquake Adm, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Tao,Zhang, Zhongjie,Zhao, Aihua,et al. Sub-triangle shooting ray-tracing in complex 3D VTI media[J]. JOURNAL OF SEISMIC EXPLORATION,2008,17(2-3):133-146. |
| APA | Xu, Tao,Zhang, Zhongjie,Zhao, Aihua,Zhang, Anjia,Zhang, Xi,&Zhang, Hongshuang.(2008).Sub-triangle shooting ray-tracing in complex 3D VTI media.JOURNAL OF SEISMIC EXPLORATION,17(2-3),133-146. |
| MLA | Xu, Tao,et al."Sub-triangle shooting ray-tracing in complex 3D VTI media".JOURNAL OF SEISMIC EXPLORATION 17.2-3(2008):133-146. |
入库方式： OAI收割
来源：地质与地球物理研究所
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