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Type: Artigo de evento
Title: On The Use Of Smooth Velocities In Ray-based Stacking And Time-migration
Author: Gelius L.J.
Tygel M.
Abstract: We revisit ray-based approaches to stacking and time migration of seismic data, and investigate the role of the smooth-velocity condition normally attached to such techniques. It is demonstrated that the smooth velocity field plays the role of a replacement medium which ideally should have the following characteristic: the one-way analogues of the stacking and time-migration operators can be approximated in a paraxial sense by means of its impulse responses. In order to link the intrinsic properties of this smooth medium to the data-driven velocities, an incremental ray propagator system has been introduced. Based on this system, it is shown how stacking and time-migration velocities can be regarded as paraxial quantities which can be mapped to intrinsic properties representing information sampled along the central or mapping ray of the paraxial impulse responses considered.
Editor: EAGE Publishing BV
Rights: fechado
Identifier DOI: 
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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