FREQUENCY-DOMAIN FINITE-DIFFERENCE AMPLITUDE-PRESERVING MIGRATION
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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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