Wave equation depth migration using complex Padé approximation

Detalhes bibliográficos
Autor(a) principal: Pestana,Reynam C.
Data de Publicação: 2009
Outros Autores: Freitas,Jacira C.B., Costa,Jessé C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Geofísica (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-261X2009000100008
Resumo: We propose a new method of depth migration based on a constant density variable velocity wave equation in the space-frequency domain. A complex Padé approximation of the wave equation evolution operator is used for wavefield extrapolation. This method mitigates the inaccuracies and instabilities due to evanescent waves and produces images with fewer numerical artifacts than those obtained with a real Padé approximation of the exponential operator, mainly in media with strong velocity variations. Tests on zero-offset data from the SEG/EAGE salt model and the 2D Marmousi prestack dataset show that the proposed migration method can handle strong lateral variations and also has a good steep dip response. We compare the results of the proposed method with those obtained using split-step Fourier (SSF), phase shift plus interpolation (PSPI) and Fourier finite-difference (FFD) methods.
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spelling Wave equation depth migration using complex Padé approximationdepth migrationone-wave equationcomplex Padé approximationprestack migrationWe propose a new method of depth migration based on a constant density variable velocity wave equation in the space-frequency domain. A complex Padé approximation of the wave equation evolution operator is used for wavefield extrapolation. This method mitigates the inaccuracies and instabilities due to evanescent waves and produces images with fewer numerical artifacts than those obtained with a real Padé approximation of the exponential operator, mainly in media with strong velocity variations. Tests on zero-offset data from the SEG/EAGE salt model and the 2D Marmousi prestack dataset show that the proposed migration method can handle strong lateral variations and also has a good steep dip response. We compare the results of the proposed method with those obtained using split-step Fourier (SSF), phase shift plus interpolation (PSPI) and Fourier finite-difference (FFD) methods.Sociedade Brasileira de Geofísica2009-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-261X2009000100008Revista Brasileira de Geofísica v.27 n.1 2009reponame:Revista Brasileira de Geofísica (Online)instname:Sociedade Brasileira de Geofísica (SBG)instacron:SBG10.1590/S0102-261X2009000100008info:eu-repo/semantics/openAccessPestana,Reynam C.Freitas,Jacira C.B.Costa,Jessé C.eng2009-08-14T00:00:00Zoai:scielo:S0102-261X2009000100008Revistahttp://www.scielo.br/rbgONGhttps://old.scielo.br/oai/scielo-oai.php||sbgf@sbgf.org.br1809-45110102-261Xopendoar:2009-08-14T00:00Revista Brasileira de Geofísica (Online) - Sociedade Brasileira de Geofísica (SBG)false
dc.title.none.fl_str_mv Wave equation depth migration using complex Padé approximation
title Wave equation depth migration using complex Padé approximation
spellingShingle Wave equation depth migration using complex Padé approximation
Pestana,Reynam C.
depth migration
one-wave equation
complex Padé approximation
prestack migration
title_short Wave equation depth migration using complex Padé approximation
title_full Wave equation depth migration using complex Padé approximation
title_fullStr Wave equation depth migration using complex Padé approximation
title_full_unstemmed Wave equation depth migration using complex Padé approximation
title_sort Wave equation depth migration using complex Padé approximation
author Pestana,Reynam C.
author_facet Pestana,Reynam C.
Freitas,Jacira C.B.
Costa,Jessé C.
author_role author
author2 Freitas,Jacira C.B.
Costa,Jessé C.
author2_role author
author
dc.contributor.author.fl_str_mv Pestana,Reynam C.
Freitas,Jacira C.B.
Costa,Jessé C.
dc.subject.por.fl_str_mv depth migration
one-wave equation
complex Padé approximation
prestack migration
topic depth migration
one-wave equation
complex Padé approximation
prestack migration
description We propose a new method of depth migration based on a constant density variable velocity wave equation in the space-frequency domain. A complex Padé approximation of the wave equation evolution operator is used for wavefield extrapolation. This method mitigates the inaccuracies and instabilities due to evanescent waves and produces images with fewer numerical artifacts than those obtained with a real Padé approximation of the exponential operator, mainly in media with strong velocity variations. Tests on zero-offset data from the SEG/EAGE salt model and the 2D Marmousi prestack dataset show that the proposed migration method can handle strong lateral variations and also has a good steep dip response. We compare the results of the proposed method with those obtained using split-step Fourier (SSF), phase shift plus interpolation (PSPI) and Fourier finite-difference (FFD) methods.
publishDate 2009
dc.date.none.fl_str_mv 2009-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-261X2009000100008
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-261X2009000100008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0102-261X2009000100008
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Geofísica
publisher.none.fl_str_mv Sociedade Brasileira de Geofísica
dc.source.none.fl_str_mv Revista Brasileira de Geofísica v.27 n.1 2009
reponame:Revista Brasileira de Geofísica (Online)
instname:Sociedade Brasileira de Geofísica (SBG)
instacron:SBG
instname_str Sociedade Brasileira de Geofísica (SBG)
instacron_str SBG
institution SBG
reponame_str Revista Brasileira de Geofísica (Online)
collection Revista Brasileira de Geofísica (Online)
repository.name.fl_str_mv Revista Brasileira de Geofísica (Online) - Sociedade Brasileira de Geofísica (SBG)
repository.mail.fl_str_mv ||sbgf@sbgf.org.br
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