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Optimization Methods for Least Squares Time Migrations
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 8th Congress of the Balkan Geophysical Society, Oct 2015, Volume 2015, p.1 - 5
Abstract
Summary
Least Squares Migration (LSM) is well known migration methods, but it is very expensive because of time. There are many optimization methods to improve LSM results. In this paper, five optimization methods, LSQR, Shooting, Grafting, Gauss-Seidel and Conjugate-Gradient are applied to data (SEG/ EAGE salt model) in order to obtain better migration results and to compare them in terms of quality, time and resolution. Tests have shown that the Gauss-Seidel method is the best method yields improved amplitude response, less time and higher resolution compared to others.
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