基于快速推进与波前构建的联合3D走时计算

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Bibliographic Details
Published in应用地球物理：英文版 Vol. 14; no. 1; pp. 56 - 63
Main Author 孙辉 孙建国 孙章庆 韩复兴 刘明忱 刘志强 高正辉 石秀林
Format Journal Article
LanguageEnglish
Published 2017
Subjects
地震波传播
快速推进发
波前构建法
走时计算
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Bibliography:3D traveltime calculation is widely used in seismic exploration technologies such as seismic migration and tomography. The fast marching method （FMM） is useful for calculating 3D traveltime and has proven to be efficient and stable. However, it has low calculation accuracy near the source, which thus gives it low overall accuracy. This paper proposes a joint traveltime calculation method to solve this problem. The method firstly employs the wavefront construction method （WFC）, which has a higher calculation accuracy than FMM in calculating traveltime in the small area near the source, and secondly adopts FMM to calculate traveltime for the remaining grid nodes. Due to the increase in calculation precision of grid nodes near the source, this new algorithm is shown to have good calculation precision while maintaining the high calculation efficiency of FMM, which is employed in most of the computational area. Results are verified using various numerical models.
11-5212/O
Sun Hui1, Sun Jian-Guo1, Sun Zhang-Qing1, Han Fu-Xing1, Liu Zhi-Qiang1, Liu Ming-Chen1, Gao Zheng-Hui1, and Shi Xiu-Lin1（ 1. College for Geoexploration Science Technology, Jilin University, Changchun 130026, China.）
ISSN:1672-7975
1993-0658