Ground-roll attenuation using a 2D time-derivative filter

Detalhes bibliográficos
Autor(a) principal: Melo, Paulo E. M.
Data de Publicação: 2009
Outros Autores: Porsani, Milton José, Silva, Michelângelo Gomes da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13530
Resumo: Texto completo: acesso restrito. p. 343-353
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spelling Melo, Paulo E. M.Porsani, Milton JoséSilva, Michelângelo Gomes daMelo, Paulo E. M.Porsani, Milton JoséSilva, Michelângelo Gomes da2013-11-03T14:35:29Z20090016-8025http://repositorio.ufba.br/ri/handle/ri/13530v. 57, n. 3Texto completo: acesso restrito. p. 343-353We present a new filtering method for the attenuation of ground-roll. The method is based on the application of a bi-dimensional filter for obtaining the time-derivative of the seismograms. Before convolving the filter with the input data matrix, the normal moveout correction is applied to the seismograms with the purpose of flattening the reflections. The method can locally attenuate the amplitude of data of low frequency (in the ground-roll and stretch normal moveout region) and enhance flat events (reflections). The filtered seismograms can reveal horizontal or sub-horizontal reflections while vertical or sub-vertical events, associated with ground-roll, are attenuated. A regular set of samples around each neighbourhood data sample of the seismogram is used to estimate the time-derivative. A numerical approximation of the derivative is computed by taking the difference between the interpolated values calculated in both the positive and the negative neighbourhood of the desired position. The coefficients of the 2D time-derivative filter are obtained by taking the difference between two filters that interpolate at positive and negative times. Numerical results that use real seismic data show that the proposed method is effective and can reveal reflections masked by the ground-roll. Another benefit of the method is that the stretch mute, normally applied after the normal moveout correction, is unnecessary. The new filtering approach provides results of outstanding quality when compared to results obtained from the conventional FK filtering method.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-10-14T12:36:08Z No. of bitstreams: 1 j.1365-2478.2008.00740.x.pdf: 1845698 bytes, checksum: e426779d69e79d9384b4b4c027870a36 (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2013-11-03T14:35:29Z (GMT) No. of bitstreams: 1 j.1365-2478.2008.00740.x.pdf: 1845698 bytes, checksum: e426779d69e79d9384b4b4c027870a36 (MD5)Made available in DSpace on 2013-11-03T14:35:29Z (GMT). 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dc.title.pt_BR.fl_str_mv Ground-roll attenuation using a 2D time-derivative filter
dc.title.alternative.pt_BR.fl_str_mv Geophysical Prospecting
title Ground-roll attenuation using a 2D time-derivative filter
spellingShingle Ground-roll attenuation using a 2D time-derivative filter
Melo, Paulo E. M.
title_short Ground-roll attenuation using a 2D time-derivative filter
title_full Ground-roll attenuation using a 2D time-derivative filter
title_fullStr Ground-roll attenuation using a 2D time-derivative filter
title_full_unstemmed Ground-roll attenuation using a 2D time-derivative filter
title_sort Ground-roll attenuation using a 2D time-derivative filter
author Melo, Paulo E. M.
author_facet Melo, Paulo E. M.
Porsani, Milton José
Silva, Michelângelo Gomes da
author_role author
author2 Porsani, Milton José
Silva, Michelângelo Gomes da
author2_role author
author
dc.contributor.author.fl_str_mv Melo, Paulo E. M.
Porsani, Milton José
Silva, Michelângelo Gomes da
Melo, Paulo E. M.
Porsani, Milton José
Silva, Michelângelo Gomes da
description Texto completo: acesso restrito. p. 343-353
publishDate 2009
dc.date.issued.fl_str_mv 2009
dc.date.accessioned.fl_str_mv 2013-11-03T14:35:29Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/13530
dc.identifier.issn.none.fl_str_mv 0016-8025
dc.identifier.number.pt_BR.fl_str_mv v. 57, n. 3
identifier_str_mv 0016-8025
v. 57, n. 3
url http://repositorio.ufba.br/ri/handle/ri/13530
dc.language.iso.fl_str_mv eng
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