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- Title
Joint 3D traveltime calculation based on fast marching method and wavefront construction.
- Authors
Sun, Hui; Sun, Jian-Guo; Sun, Zhang-Qing; Han, Fu-Xing; Liu, Zhi-Qiang; Liu, Ming-Chen; Gao, Zheng-Hui; Shi, Xiu-Lin
- Abstract
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.
- Subjects
SEISMIC prospecting; SEISMIC migration; SEISMIC tomography; NUMERICAL analysis; FAST marching method (Mathematics)
- Publication
Applied Geophysics: Bulletin of Chinese Geophysical Society, 2017, Vol 14, Issue 1, p56
- ISSN
1672-7975
- Publication type
Article
- DOI
10.1007/s11770-017-0611-3