A new approach to coherency inversion by global optimization

Shmariahu Keydar, Evgeny Landa, G. Ryzhikov, Valery Sorin

Research output: Contribution to conferencePaperpeer-review

Abstract

Global coherency inversion, which consists of maximizing a semblance function calculated from prestack seismic data, has been proposed for estimating the velocity-depth model with no necessity for prestack or poststack travel time picking. At each iteration of inversion, multi-offset travel time calculation is performed and the semblance value is computed on prestack gathers along these time curves. Layer velocities and zero-offset times for principle reflectors are chosen as inversion parameters. In this work, coherency optimization is based on a new Regularized Global Approximation method (unlike simulated annealing or genetic algorithms, it includes a predictor-corrector procedure with significantly reduces the number of evaluations of the objective function.

Original languageEnglish
Pages1081-1083
Number of pages3
DOIs
StatePublished - 1995
Externally publishedYes
Event1995 Society of Exploration Geophysicists Annual Meeting, SEG 1995 - Houston, United States
Duration: 8 Oct 199513 Oct 1995

Conference

Conference1995 Society of Exploration Geophysicists Annual Meeting, SEG 1995
Country/TerritoryUnited States
CityHouston
Period8/10/9513/10/95

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