Imaging the Subsurface With the High-Speed Train Seismic Data-Based Elastic Reverse Time Migration

The high-speed train (HST) can create a new seismic source for subsurface exploration with the advantages of good repeatability, high strength, and wide distribution. However, the complexity of this brand new seismic data also brings challenges to its application. In this article, we try the possibility of application of the elastic reverse time migration (RTM) to the HST seismic data. The decoupled equation system is utilized to obtain the P- and S-waves deduced from the HST. Then, the imaging conditions based on separated wave modes are used to get the interface information of the subsurface. Numerical experiments with the Marmousi2 velocity model indicated that the subsurface structures can be well acquired, which proves the feasibility of applying the elastic RTM on the seismic data induced by HST and illustrates the great potential in utilizing the HST seismic data for subsurface exploration.