EAEG Workshop - Practical Aspects of Seismic Data Inversion 1990
DOI: 10.3997/2214-4609.201411199
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Common-offset depth migration as a velocity analysis tool

Abstract: We imaged the Marmousi dataset using an efficient Kirchhoff prestack depth migration algorithm combined with a layer-stripping velocity analysis technique. The method relies on repeated common-offset test migrations to build a velocity model systematically from the top down. Results of these common-offset depth migrations are sorted into common image-point displays. By observing residual moveout as a function of offset in these displays, we determine veloeities and boundary locations for each layer. The assume… Show more

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Cited by 1 publication
(3 citation statements)
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“…In the context of commonoffset migration, which seems to be the preferred strategy for migration velocity analysis, Kirchhoff migration has met with considerable interest (e.g. Wang et al 1991;Williams et al 1992). We have to take into account a major difficulty associated with blocky models: Kirchhoff migration makes use of computed traveltimes, and these traveltimes are extremely sensitive to perturbations of the velocity model, especially to perturbations of the geometry of interfaces that separate layers with very different velocities.…”
Section: Blocky Versus Smooth Models For Migration a N D Migration Vementioning
confidence: 99%
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“…In the context of commonoffset migration, which seems to be the preferred strategy for migration velocity analysis, Kirchhoff migration has met with considerable interest (e.g. Wang et al 1991;Williams et al 1992). We have to take into account a major difficulty associated with blocky models: Kirchhoff migration makes use of computed traveltimes, and these traveltimes are extremely sensitive to perturbations of the velocity model, especially to perturbations of the geometry of interfaces that separate layers with very different velocities.…”
Section: Blocky Versus Smooth Models For Migration a N D Migration Vementioning
confidence: 99%
“…Wang et al 1991;Williams, Cowley & Notfors 1992;Williams & Cowley 1993). Common-offset migration gives, for each offset, a migrated image of the recorded reflections: the result is thus a cube of migrated images (Fig.…”
Section: Introductionmentioning
confidence: 99%
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