Migration-based Traveltime Waveform Inversion of 2D Simple Structures: the Synclay Model

Abstract : A reformulation of the classical least-squares waveform inversion problem is proposed to retrieve the background velocity from surface seismic reflection data. To eliminate the problem of local minima, a change of unknown is performed: the depth reflectivity is replaced by a reflectivity in the time domain through a migration step. The increase in modeling complexity is the price for the enlargement of the attraction domain of the global minimum, which allows for the use of a local optimization method. A numerical implementation with a finite difference acoustic simulator is detailed. Inversion of a non-layered 2D slowness model is performed.
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Rapport
[Research Report] RR-3502, INRIA. 1998
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https://hal.inria.fr/inria-00073183
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Soumis le : mercredi 24 mai 2006 - 12:05:42
Dernière modification le : vendredi 25 mai 2018 - 12:02:03
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  • HAL Id : inria-00073183, version 1

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Guy Chavent, François Clément, Susana Gómez. Migration-based Traveltime Waveform Inversion of 2D Simple Structures: the Synclay Model. [Research Report] RR-3502, INRIA. 1998. 〈inria-00073183〉

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