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Tomographic full waveform inversion via iterative least-squares migration by variable projection methodNormal access

Authors: G.B. Barnier, E.B. Biondi and B.B. Biondi
Event name: First EAGE/SBGf Workshop on Least-Squares Migration
Session: Theory and Implementation II 
Publication date: 27 November 2018
DOI: 10.3997/2214-4609.201803066
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 358.17Kb )
Price: € 20

We tackle the well-known global convergence issue associated to any full waveform inversion (FWI) approach by solving an extended-image space least-squares migration problem to remove any local minima present in the FWI objective function. We discuss the connection between the reflectivity and migration velocity inversion and show the importance of combing the two problems using one objective function. Moreover, we show the full separability of the two inverse problems by using the variable projection method.

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