Redatuming Operators Analysis in Homogeneous Media

A redatuming operation is used to simulate the acquisition of data in new levels, avoiding distortions produced by near-surface irregularities related to either geometric or material property heterogeneities. In this work, the application of the true-amplitude Kirchhoff redatuming (TAKR) operator on...

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Bibliographic Details
Published in:Acta geophysica 2015-04, Vol.63 (2), p.414-431
Main Authors: de Oliveira, Souza, de Figueiredo, Jose J. S., Freitas, Lucas
Format: Article
Language:English
Subjects:
amplitude analysis
Datasets
Earth and Environmental Science
Earth Sciences
Geophysics
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Kirchhoff redatuming
Simulation
Structural Geology
travel-time analysis
true-amplitude Kirchhoff redatuming
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Summary:A redatuming operation is used to simulate the acquisition of data in new levels, avoiding distortions produced by near-surface irregularities related to either geometric or material property heterogeneities. In this work, the application of the true-amplitude Kirchhoff redatuming (TAKR) operator on homogeneous media is compared with conventional Kirchhoff redatuming (KR) operator restricted to the zero-offset case. The TAKR and the KR operators are analytically and numerically compared in order to verify their impacts on the data at a new level. Analyses of amplitude and velocity sensitivity of the TAKR and KR were performed: one concerning the difference between the weight functions and the other related to the velocity variation. The comparisons between operators were performed using numerical examples. The feasibility of the KR and TAKR operators was demonstrated not only kinematically but also dynamically for their purposes. In other words, one preserves amplitude (KR), and the other corrects the amplitude (TAKR). In the end, we applied the operators to a GPR data set.
ISSN:1895-6572
1895-7455
DOI:10.2478/s11600-014-0248-z