Block modeling and segmentally iterative ray tracing in complex 3D media
文献类型：期刊论文
| 作者 | Xu, Tao; Xu, Guoming; Gao, Ergen; Li, Yingchun; Jiang, Xianyi; Luo, Kaiyun |
| 刊名 | GEOPHYSICS
 |
| 出版日期 | 2006-05-01 |
| 卷号 | 71期号:3页码:T41-T51 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/1.2192948 |
| 文献子类 | Article |
| 英文摘要 | We propose using a set of blocks to approximate geologically complex media that cannot be well described by layered models. Interfaces between blocks are triangulated to prevent overlaps or gaps often produced by other techniques. such as B-splines, and to speed up the calculation of intersection points between a ray and block interfaces. We also use a smoothing algorithm to make the normal vector of each triangle continuous at the boundary, so that ray tracing can be performed with stability and accuracy. Based on Fermat's principle, we perturb an initial raypath between two points, generally obtained by shooting, with a segmentally iterative ray-tracing (SIRT) method. Intersection points on a ray are updated in sequence, instead of simultaneously, because the number of new intersection points may be increased or decreased during the iteration process. To improve convergence speed, we update the intersection points by a first-order explicit formula instead of traditional iterative methods. Only transmitted and reflected waves are considered. Numerical tests demonstrate that the combination of block modeling and segmentally iterative ray tracing is effective in implementing kinematic two-point ray tracing in complex 3D media. |
| WOS关键词 | WAVE-FRONT CONSTRUCTION ; DISCRETE SMOOTH INTERPOLATION ; TRAVEL-TIME ; HETEROGENEOUS MEDIA ; VELOCITY STRUCTURE ; ISOTROPIC MEDIA ; 2-POINT ; ALGORITHM ; INVERSION ; 2-D |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| WOS记录号 | WOS:000238819700050 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67186]  |
| 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 100029, Chaoyang Dist, Peoples R China 2.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Anhui Prov, Peoples R China 3.Bur Geophys Prospect, Geophys Res Inst, CNPC, Hebei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Tao,Xu, Guoming,Gao, Ergen,et al. Block modeling and segmentally iterative ray tracing in complex 3D media[J]. GEOPHYSICS,2006,71(3):T41-T51. |
| APA | Xu, Tao,Xu, Guoming,Gao, Ergen,Li, Yingchun,Jiang, Xianyi,&Luo, Kaiyun.(2006).Block modeling and segmentally iterative ray tracing in complex 3D media.GEOPHYSICS,71(3),T41-T51. |
| MLA | Xu, Tao,et al."Block modeling and segmentally iterative ray tracing in complex 3D media".GEOPHYSICS 71.3(2006):T41-T51. |
入库方式： OAI收割
来源：地质与地球物理研究所
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