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Anisotropic Migration Velocity Analysis Using the Elastic Wave EquationNormal access

Authors: W. Weibull and B. Arntsen
Event name: 74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Session: Velocity Model Building
Publication date: 04 June 2012
DOI: 10.3997/2214-4609.20148589
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 244.38Kb )
Price: € 20

Summary:
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.


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