Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions?
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFBA |
Texto Completo: | http://www.repositorio.ufba.br/ri/handle/ri/3255 |
Resumo: | We present an evaluation of the time lapse critical reflection method from the point of view of sensitivity and uncertainty analysis. The purpose of this analysis is to establish the link between changes in the p-wave velocity in the reservoir, due to fluid substitution, and the critical distance (XC), a dynamic parameter. Two static parameters of the overburden are considered in the analysis: its thickness and its effective or equivalent P-wave velocity. Stochastic uncertainty analysis by means of Monte Carlo simulations was carried out to determine the sensitivity of XC to velocity contrast between that of the reservoir and the corresponding one to the overburden (incident medium). Results show that the effect of the velocity values in each medium, overburden and reservoir (reflecting medium), on estimates of XC depends on the velocity contrast between the two media. It turns out that the greater the velocity difference between the two media, the greater the effects associated with the reservoir P-wave velocity. On the other hand, the dependence of XC on overburden velocity (Vrms of the incident medium) is just the opposite. From the inversion viewpoint, predicting changes of the reservoir P-wave velocity from changes in critical distance is strongly dependent of the uncertainty in the initial estimate of the reservoir P-wave velocity, followed by degree of importance by the uncertainty in the overburden velocity. Other sources of uncertainty in this analysis turned out to be negligible. Geomechanical effects have not been accounted for in this analysis. |
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Artola, Fredy Alex VillaorduñaBastante, Vladimir AlvaradoFigueiró, Wilson MouzerArtola, Fredy Alex VillaorduñaBastante, Vladimir AlvaradoFigueiró, Wilson Mouzer2011-10-11T12:27:56Z2011-10-11T12:27:56Z20080102-261Xhttp://www.repositorio.ufba.br/ri/handle/ri/3255v.26, n.3We present an evaluation of the time lapse critical reflection method from the point of view of sensitivity and uncertainty analysis. The purpose of this analysis is to establish the link between changes in the p-wave velocity in the reservoir, due to fluid substitution, and the critical distance (XC), a dynamic parameter. Two static parameters of the overburden are considered in the analysis: its thickness and its effective or equivalent P-wave velocity. Stochastic uncertainty analysis by means of Monte Carlo simulations was carried out to determine the sensitivity of XC to velocity contrast between that of the reservoir and the corresponding one to the overburden (incident medium). Results show that the effect of the velocity values in each medium, overburden and reservoir (reflecting medium), on estimates of XC depends on the velocity contrast between the two media. It turns out that the greater the velocity difference between the two media, the greater the effects associated with the reservoir P-wave velocity. On the other hand, the dependence of XC on overburden velocity (Vrms of the incident medium) is just the opposite. From the inversion viewpoint, predicting changes of the reservoir P-wave velocity from changes in critical distance is strongly dependent of the uncertainty in the initial estimate of the reservoir P-wave velocity, followed by degree of importance by the uncertainty in the overburden velocity. Other sources of uncertainty in this analysis turned out to be negligible. Geomechanical effects have not been accounted for in this analysis.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2011-10-11T12:27:56Z No. of bitstreams: 1 fffffFFF.pdf: 167479 bytes, checksum: d67f985abb464d79d08f6d98cd2c7963 (MD5)Made available in DSpace on 2011-10-11T12:27:56Z (GMT). No. of bitstreams: 1 fffffFFF.pdf: 167479 bytes, checksum: d67f985abb464d79d08f6d98cd2c7963 (MD5) Previous issue date: 2008São PauloRevista Brasileira de Geofísicacritical reflectiontime-lapse seismicreservoir monitoringsensitivity analysisreflexão críticasísmica time-lapsemonitoramento de reservatórioanálise de sensibilidadeTime-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions?Revista Brasileira de Geofísicainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAinfo:eu-repo/semantics/openAccessORIGINALfffffFFF.pdffffffFFF.pdfapplication/pdf167479https://repositorio.ufba.br/bitstream/ri/3255/1/fffffFFF.pdfd67f985abb464d79d08f6d98cd2c7963MD51LICENSElicense.txtlicense.txttext/plain1906https://repositorio.ufba.br/bitstream/ri/3255/2/license.txt285abaabdb4de51c5f1029d4f5e881d6MD52TEXTfffffFFF.pdf.txtfffffFFF.pdf.txtExtracted texttext/plain17398https://repositorio.ufba.br/bitstream/ri/3255/3/fffffFFF.pdf.txt2b41831555e12a7808102c2412a5f9e0MD53ri/32552022-07-05 14:03:22.816oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:22Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
dc.title.pt_BR.fl_str_mv |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? |
dc.title.alternative.pt_BR.fl_str_mv |
Revista Brasileira de Geofísica |
title |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? |
spellingShingle |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? Artola, Fredy Alex Villaorduña critical reflection time-lapse seismic reservoir monitoring sensitivity analysis reflexão crítica sísmica time-lapse monitoramento de reservatório análise de sensibilidade |
title_short |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? |
title_full |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? |
title_fullStr |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? |
title_full_unstemmed |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? |
title_sort |
Time-lapse critical reflection: does it really work in seismic monitoring of low porosity and high effective stress conditions? |
author |
Artola, Fredy Alex Villaorduña |
author_facet |
Artola, Fredy Alex Villaorduña Bastante, Vladimir Alvarado Figueiró, Wilson Mouzer |
author_role |
author |
author2 |
Bastante, Vladimir Alvarado Figueiró, Wilson Mouzer |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Artola, Fredy Alex Villaorduña Bastante, Vladimir Alvarado Figueiró, Wilson Mouzer Artola, Fredy Alex Villaorduña Bastante, Vladimir Alvarado Figueiró, Wilson Mouzer |
dc.subject.por.fl_str_mv |
critical reflection time-lapse seismic reservoir monitoring sensitivity analysis reflexão crítica sísmica time-lapse monitoramento de reservatório análise de sensibilidade |
topic |
critical reflection time-lapse seismic reservoir monitoring sensitivity analysis reflexão crítica sísmica time-lapse monitoramento de reservatório análise de sensibilidade |
description |
We present an evaluation of the time lapse critical reflection method from the point of view of sensitivity and uncertainty analysis. The purpose of this analysis is to establish the link between changes in the p-wave velocity in the reservoir, due to fluid substitution, and the critical distance (XC), a dynamic parameter. Two static parameters of the overburden are considered in the analysis: its thickness and its effective or equivalent P-wave velocity. Stochastic uncertainty analysis by means of Monte Carlo simulations was carried out to determine the sensitivity of XC to velocity contrast between that of the reservoir and the corresponding one to the overburden (incident medium). Results show that the effect of the velocity values in each medium, overburden and reservoir (reflecting medium), on estimates of XC depends on the velocity contrast between the two media. It turns out that the greater the velocity difference between the two media, the greater the effects associated with the reservoir P-wave velocity. On the other hand, the dependence of XC on overburden velocity (Vrms of the incident medium) is just the opposite. From the inversion viewpoint, predicting changes of the reservoir P-wave velocity from changes in critical distance is strongly dependent of the uncertainty in the initial estimate of the reservoir P-wave velocity, followed by degree of importance by the uncertainty in the overburden velocity. Other sources of uncertainty in this analysis turned out to be negligible. Geomechanical effects have not been accounted for in this analysis. |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008 |
dc.date.accessioned.fl_str_mv |
2011-10-11T12:27:56Z |
dc.date.available.fl_str_mv |
2011-10-11T12:27:56Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufba.br/ri/handle/ri/3255 |
dc.identifier.issn.none.fl_str_mv |
0102-261X |
dc.identifier.number.pt_BR.fl_str_mv |
v.26, n.3 |
identifier_str_mv |
0102-261X v.26, n.3 |
url |
http://www.repositorio.ufba.br/ri/handle/ri/3255 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Revista Brasileira de Geofísica |
publisher.none.fl_str_mv |
Revista Brasileira de Geofísica |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFBA instname:Universidade Federal da Bahia (UFBA) instacron:UFBA |
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Universidade Federal da Bahia (UFBA) |
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UFBA |
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UFBA |
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Repositório Institucional da UFBA |
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Repositório Institucional da UFBA |
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