| 地震走时CT波前追踪 |
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| 引用本文： | 刁顺,杨慧珠,许云.地震走时CT波前追踪[J].CT理论与应用研究,1993(4). |
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| 作者姓名： | 刁顺 杨慧珠 许云 |
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| 作者单位： | 清华大学工程力学系 100084
(刁顺，杨慧珠)，中国地质大学 100083(许云) |
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| 摘 要： | 把走时CT结果作为地震衍射CT(DCT)的背景场可以改善DCT之成像质量。本文由Radon变换、泛函分析变分原理和微分几何导出程函方程后,采取有限差分法求解,实行波前追踪。通过对反射地震勘探和VSP 结构的源——接收系统编程实际运算,表明该波前追踪程序输入简单,适合于多层介质模型,各网格点的走时能迅速确定。
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| 关 键 词： | Radon变换 走时数据 波前追踪 有限差分 速度CT |
Wavefront Tracing in Seismic Velocity Tomography by Using of Traveltime Data |
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| Diao Shun Yang Huizhu.Wavefront Tracing in Seismic Velocity Tomography by Using of Traveltime Data[J].Computerized Tomography Theory and Applications,1993(4). |
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| Authors: | Diao Shun Yang Huizhu |
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| Abstract: | By taking the results of traveltime data as a background for seismic diffrac-tion tomography,we will improve the quality of DCT.In this paper,the ray tracingmethod is replaced by wavefront tracing,which is based on eikonal equation and finite dif-ference method.The time at all mesh points and ray pathes can be determined in this way.The program for seismic reflection exploration and NSP has been designed,and its input isvery simple and suitable for multilayer model. |
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| Keywords: | Radon transform Traveltime data Wavefront tracing Finite difference Velocity CT |
| 本文献已被 CNKI 等数据库收录！ |
