Refractor velocity analysis: a signal processing procedure

Abstract

A B S T R A C TThis paper presents a signal processing procedure to perform refractor velocity analysis. The procedure enables one to obtain the seismic velocity from the refracted wavefield without the picking of refracted arrival times. Two processing procedures are derived, one starting from a seismic interferometric approach and another, from the conventional reciprocal method and generalized reciprocal method approaches. The theoretical equivalence of the two approaches is also demonstrated.The proposed processing procedure is applied to synthetic data in order to test the influence of some procedural parameters and its capability to reconstruct a known velocity model starting from refracted signals, without and with perturbations, in arrival times and noise; finally, it is applied to a field data set.

Application of 3D Statics Technology and Seismic Interferometry to Engineering Geophysics

“…De Franco (2005Franco ( & 2011 has since refined this method by processing seismic refraction data like seismic reflection data. The outcome of this sophistication is a time depth seismic refraction section, and the ability to delineate many refractors.…”