Laguerre-gauss filters in reverse time migration image reconstruction

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dc.citation.journalTitleRevista Brasileira de Geofisicaeng
dc.contributor.authorCastrillón, J.G.P.
dc.contributor.authorMontoya, O.L.Q.
dc.contributor.authorSierra-Sosa, D.
dc.contributor.departmentUniversidad EAFIT. Escuela de Cienciasspa
dc.contributor.researchgroupModelado Matemáticospa
dc.date.accessioned2021-04-12T14:07:15Z
dc.date.available2021-04-12T14:07:15Z
dc.date.issued2017-01-01
dc.description.abstractReverse time migration (RTM) solves the acoustic or elastic wave equation by means of the extrapolation from source and receiver wavefield in time. A migrated image is obtained by applying a criteria known as imaging condition. The cross-correlation between source and receiver wavefields is the commonly used imaging condition. However, this imaging condition produces spatial low-frequency noise, called artifacts, due to the unwanted correlation of the diving, head and backscattered waves. Several techniques have been proposed to reduce the artifacts occurrence. Derivative operators as Laplacian are the most frequently used. In this work, we propose a technique based on a spiral phase filter ranging from 0 to 2p, and a toroidal amplitude bandpass filter, known as Laguerre-Gauss transform. Through numerical experiments we present the application of this particular filter on three synthetic data sets. In addition, we present a comparative spectral study of images obtained by the zero-lag cross-correlation imaging condition, the Laplacian filtering and the Laguerre-Gauss filtering, showing their frequency features. We also present evidences not only with simulated noisy velocity fields but also by comparison with the model velocity field gradients that this method improves the RTM images by reducing the artifacts and notably enhance the reflective events. © 2017 Sociedade Brasileira de Geofísica.eng
dc.identifierhttps://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=8240
dc.identifier.doi10.22564/rbgf.v35i1.930
dc.identifier.issn0102261X
dc.identifier.otherSCOPUS;2-s2.0-85047001868
dc.identifier.urihttp://hdl.handle.net/10784/27799
dc.language.isoengeng
dc.publisherSociedade Brasileira de Geofisica
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85047001868&partnerID=40&md5=b9414025a8759c46fa93f12e110e020b
dc.rightsSociedade Brasileira de Geofisica
dc.sourceRevista Brasileira de Geofisica
dc.subject.keywordbackscattereng
dc.subject.keywordcomparative studyeng
dc.subject.keywordcorrelationeng
dc.subject.keyworddata seteng
dc.subject.keywordelastic waveeng
dc.subject.keywordexperimental studyeng
dc.subject.keywordfiltereng
dc.subject.keywordimage analysiseng
dc.subject.keywordimaging methodeng
dc.subject.keywordLaplace transformeng
dc.subject.keywordseismic migrationeng
dc.subject.keywordtransformeng
dc.subject.keywordvelocity profileeng
dc.subject.keywordwave equationeng
dc.subject.keywordwave fieldeng
dc.titleLaguerre-gauss filters in reverse time migration image reconstructioneng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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