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Anisotropic Migration Velocity Analysis Using the Elastic Wave Equation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 74th EAGE Conference and Exhibition incorporating EUROPEC 2012, Jun 2012, cp-293-00594
- ISBN: 978-90-73834-27-9
Abstract
In this paper we investigate if elastic reverse time migration, combined with differential semblance optimization, can be used to estimate an anisotropic seismic velocity field. First we define formulas for elastic reverse time migration and for the differential semblance least squares misfit function. Next, we present the formulas for the gradient of the misfit function with respect to the velocities over a general anisotropic medium. Finally, we present two numerical examples that confirm the potential of the method both in estimating velocity parameters, and in improving depth imaging from synthetic surface seismic data.