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Differential evolution-based optimization procedure for automatic estimation of the common-reflection surface traveltime parameters

Tiago Barros, Rafael Ferrari, Rafael Krummenauer and Renato Lopes
Differential evolution-based optimization procedure for automatic estimation of the common-reflection surface traveltime parameters
Geophysics (November 2015) 80 (6): WD189-WD200

Abstract

The common-reflection surface (CRS) method is a sophisticated alternative to the traditional common-midpoint stacking because its traveltime approximation allows for the use of more traces than the normal moveout. This in turn requires more parameters for the moveout description, thus increasing the computational burden of the parameter estimation. In the literature, a suboptimal strategy is often used, which decreases the complexity but, as we found in this work, compromises the accuracy of the parameters in some cases. To cope with this problem, in this work, we have devised detailed information for efficient estimation of the CRS parameters using the differential evolution (DE) global optimization algorithm. Because we used data sets with low fold and low signal-to-noise ratio, from which no reliable velocity analysis could be easily performed, we applied this algorithm in a fully automatic global search, i.e., without any velocity guide. The results for a 2D real data set from Brazil indicated that the global strategy yielded good results, both in terms of image quality as in the quality of the parameter volumes, especially the stacking velocity estimates, while keeping the computational costs relatively low. We also developed a convergence and a sensitivity analysis of the DE that shows its computational efficiency and the robustness of the optimization method with respect to the choice of the control parameters of the algorithm.


ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 80
Serial Issue: 6
Title: Differential evolution-based optimization procedure for automatic estimation of the common-reflection surface traveltime parameters
Affiliation: University of Campinas, School of Electrical and Computer Engineering, Campinas, Brazil
Pages: WD189-WD200
Published: 201511
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 34
Accession Number: 2016-007380
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
S34°00'00" - N05°15'00", W74°00'00" - W34°00'00"
Secondary Affiliation: DSPGeo, BRA, Brazil
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 201604
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