Imaging refractors with the convolution section

摘要

Seismic refraction data are characterized by large moveouts between adjacent traces and large amplitude variation across the refraction spread. The moveouts are the result of the predominantly horizontally traveling trajectories of refraction signals, whereas the amplitude variations are the result of the rapid geometric spread- ing factor, which is at least the reciprocal of the distance squared. The large range refraction amplitudes produces Considerable variation in signal-to-noise (S/N) ratios.