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- Title
High-precision Joint 2D Traveltime Calculation for Seismic Processing.
- Authors
Hui Sun; Fanchang Meng; Cheng Gao; Zhihou Zhang; Mingchen Liu
- Abstract
Fast Marching Method (FMM) boasts high calculation efficiency and strong adaptability and stability while being applied to seismic traveltime. However, when it is applied to the largescale model, the calculation precision of FMM is insufficient. FMM has poor calculation precision near the source, which is an essential reason for the low accuracy of the whole algorithm. This paper puts forward a common traveltime calculation method to address the problem. Wavefront Construction (WFC) with a relatively high calculation accuracy rather than FMM is adopted for calculation of the grid nodes' traveltime near the source. After that, FMM is used to calculate the seismic traveltime in the remaining area. Joint traveltime calculation method greatly improves the calculation accuracy of the source's surrounding area and the calculation accuracy of FMM. According to the new method, FMM is still adopted for the calculation of most grid nodes in the model, so the high calculation efficiency of FMM is maintained. Multiple numerical models are utilized to verify the above conclusions in the paper.
- Subjects
IMAGING systems in seismology; EARTHQUAKE resistant design
- Publication
Earth Sciences Research Journal, 2018, Issue 4, p327
- ISSN
1794-6190
- Publication type
Article
- DOI
10.15446/esrj.v22n4.77362