Refractor velocity analysis: a signal processing procedure |
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Authors: | Roberto de Franco |
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Institution: | Istituto per la Dinamica dei Processi Ambientali, CNR, via Mario Bianco, 9, 20131 Milano, Italy |
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Abstract: | This 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. |
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Keywords: | Seismic interferometry Seismic refraction processing Seismic velocity analysis |
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