Application of tomographic inversion method constrained by uphole velocity in complex mountainous areas

In the processing of complex mountainous seismic data, the key to solve the problem of static correction is to build a high-resolution near-surface velocity model that conforms to the actual geological structure. Due to the combined effect of the lack of near-offset traces, low ray density in the shallow part and the non-uniqueness of the tomographic method, there may be significant difference between the inverted shallow velocity and the true near-surface velocity. The constrained tomographic inversion method implemented in this study uses uphole velocity to speed up the convergence of the inversion process, as well as provide a structure-consistent near-surface velocity model.