FREQUENCY-DOMAIN FINITE-DIFFERENCE AMPLITUDE-PRESERVING MIGRATION

dc.contributor.author	Plessix R.E.
dc.contributor.author	Mulder W.A.
dc.date.accessioned	2022-09-23T00:35:26Z
dc.date.available	2022-09-23T00:35:26Z
dc.date.issued	2004
dc.identifier	https://elibrary.ru/item.asp?id=6625578
dc.identifier.citation	Geophysical Journal International, 2004, 157, 3, 975-987
dc.identifier.issn	0956-540X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/38713
dc.description.abstract	A migration algorithm based on the least-squares formulation will find the correct reflector amplitudes if proper migration weights are applied. The migration weights can be viewed as a pre-conditioner for a gradient-based optimization problem. The pre-conditioner should approximate the pseudo-inverse of the Hessian of the least-squares functional. Usually, an infinite receiver coverage is assumed to derive this approximation, but this may lead to poor amplitude estimates for deep reflectors.
dc.description.abstract	To avoid the assumption of infinite coverage, new amplitude-preserving migration weights are proposed based on a Born approximation of the Hessian. The expressions are tested in the context of frequency-domain finite-difference two-way migration and show improved amplitudes for the deeper reflectors.
dc.subject	FINITE DIFFERENCES
dc.subject	FREQUENCY DOMAIN
dc.subject	MIGRATION
dc.subject	PRECONDITIONER
dc.title	FREQUENCY-DOMAIN FINITE-DIFFERENCE AMPLITUDE-PRESERVING MIGRATION
dc.type	Статья

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