Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Anuário do Instituto de Geociências (Online) |
Texto Completo: | https://revistas.ufrj.br/index.php/aigeo/article/view/31194 |
Resumo: | This study presents electrofacies models for two wells with cores and sidewall cores of Coqueiros Formation, lower Cretaceous of Campos Basin. The WELL-1 is located in deep water of the south of the basin and is composed by bioclastic carbonate, siliciclastic and hybrid rocks. The electrofacies modelling distinguished four electrofacies, which are correlated to the lithofacies coquina, hybrid rock, siliciclastic mudstone, and sandstone. The WELL-2 is situated in ultra-deep water of the north of the basin and is essentially constituted of bioclastic carbonates. The electrofacies modelling for this well differentiated four electrofacies, which are correlated to the lithofacies mudstone, coquina with carbonate mud, coquina with moderate to high degree of shell fragmentation and/or oriented shells, and poorly sorted massive coquina with variable degree of shell fragmentation. This study showed that it is possible to distinguish, with high level of accuracy, bioclastic carbonate rocks from siliciclastic and hybrid rocks based on the well logs. The electrofacies analysis distinguished particle-supported carbonate rocks from mud-supported ones. It was also possible to separate bioclastic carbonate rock with different taphonomic criteria, such as organization and degree of shell fragmentation. The electrofacies model showed to be a useful tool to interpret geological intervals in wells without rock samples. Nevertheless, it will never represent all the numerous depositional facies, and thus it can not completely replace the rock ampling in detailed sedimentological and reservoir studies. |
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Anuário do Instituto de Geociências (Online) |
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Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, BrazilLogfacies; Coquinas; Hybrid rocksThis study presents electrofacies models for two wells with cores and sidewall cores of Coqueiros Formation, lower Cretaceous of Campos Basin. The WELL-1 is located in deep water of the south of the basin and is composed by bioclastic carbonate, siliciclastic and hybrid rocks. The electrofacies modelling distinguished four electrofacies, which are correlated to the lithofacies coquina, hybrid rock, siliciclastic mudstone, and sandstone. The WELL-2 is situated in ultra-deep water of the north of the basin and is essentially constituted of bioclastic carbonates. The electrofacies modelling for this well differentiated four electrofacies, which are correlated to the lithofacies mudstone, coquina with carbonate mud, coquina with moderate to high degree of shell fragmentation and/or oriented shells, and poorly sorted massive coquina with variable degree of shell fragmentation. This study showed that it is possible to distinguish, with high level of accuracy, bioclastic carbonate rocks from siliciclastic and hybrid rocks based on the well logs. The electrofacies analysis distinguished particle-supported carbonate rocks from mud-supported ones. It was also possible to separate bioclastic carbonate rock with different taphonomic criteria, such as organization and degree of shell fragmentation. The electrofacies model showed to be a useful tool to interpret geological intervals in wells without rock samples. Nevertheless, it will never represent all the numerous depositional facies, and thus it can not completely replace the rock ampling in detailed sedimentological and reservoir studies.Universidade Federal do Rio de JaneiroOliveira, Vinicius Carbone Bernardes dePassos, Felipe Vasconcelos dosSilva, Carlos Manuel de AssisBorghi, Leonardo2019-12-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufrj.br/index.php/aigeo/article/view/3119410.11137/2019_3_178_191Anuário do Instituto de Geociências; Vol 42, No 3 (2019); 178-191Anuário do Instituto de Geociências; Vol 42, No 3 (2019); 178-1911982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJenghttps://revistas.ufrj.br/index.php/aigeo/article/view/31194/17673Copyright (c) 2019 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccess2020-07-10T01:39:30Zoai:www.revistas.ufrj.br:article/31194Revistahttps://revistas.ufrj.br/index.php/aigeo/indexPUBhttps://revistas.ufrj.br/index.php/aigeo/oaianuario@igeo.ufrj.br||1982-39080101-9759opendoar:2020-07-10T01:39:30Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)false |
dc.title.none.fl_str_mv |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil |
title |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil |
spellingShingle |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil Oliveira, Vinicius Carbone Bernardes de Logfacies; Coquinas; Hybrid rocks |
title_short |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil |
title_full |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil |
title_fullStr |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil |
title_full_unstemmed |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil |
title_sort |
Electrofacies Characterization in Lacustrine Coquinas and Hybrid Deposits from Rift Phase: Pre-Salt, lower Cretaceous, Campos Basin, Brazil |
author |
Oliveira, Vinicius Carbone Bernardes de |
author_facet |
Oliveira, Vinicius Carbone Bernardes de Passos, Felipe Vasconcelos dos Silva, Carlos Manuel de Assis Borghi, Leonardo |
author_role |
author |
author2 |
Passos, Felipe Vasconcelos dos Silva, Carlos Manuel de Assis Borghi, Leonardo |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Oliveira, Vinicius Carbone Bernardes de Passos, Felipe Vasconcelos dos Silva, Carlos Manuel de Assis Borghi, Leonardo |
dc.subject.none.fl_str_mv |
|
dc.subject.por.fl_str_mv |
Logfacies; Coquinas; Hybrid rocks |
topic |
Logfacies; Coquinas; Hybrid rocks |
description |
This study presents electrofacies models for two wells with cores and sidewall cores of Coqueiros Formation, lower Cretaceous of Campos Basin. The WELL-1 is located in deep water of the south of the basin and is composed by bioclastic carbonate, siliciclastic and hybrid rocks. The electrofacies modelling distinguished four electrofacies, which are correlated to the lithofacies coquina, hybrid rock, siliciclastic mudstone, and sandstone. The WELL-2 is situated in ultra-deep water of the north of the basin and is essentially constituted of bioclastic carbonates. The electrofacies modelling for this well differentiated four electrofacies, which are correlated to the lithofacies mudstone, coquina with carbonate mud, coquina with moderate to high degree of shell fragmentation and/or oriented shells, and poorly sorted massive coquina with variable degree of shell fragmentation. This study showed that it is possible to distinguish, with high level of accuracy, bioclastic carbonate rocks from siliciclastic and hybrid rocks based on the well logs. The electrofacies analysis distinguished particle-supported carbonate rocks from mud-supported ones. It was also possible to separate bioclastic carbonate rock with different taphonomic criteria, such as organization and degree of shell fragmentation. The electrofacies model showed to be a useful tool to interpret geological intervals in wells without rock samples. Nevertheless, it will never represent all the numerous depositional facies, and thus it can not completely replace the rock ampling in detailed sedimentological and reservoir studies. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-12-21 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/31194 10.11137/2019_3_178_191 |
url |
https://revistas.ufrj.br/index.php/aigeo/article/view/31194 |
identifier_str_mv |
10.11137/2019_3_178_191 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/31194/17673 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro |
publisher.none.fl_str_mv |
Universidade Federal do Rio de Janeiro |
dc.source.none.fl_str_mv |
Anuário do Instituto de Geociências; Vol 42, No 3 (2019); 178-191 Anuário do Instituto de Geociências; Vol 42, No 3 (2019); 178-191 1982-3908 0101-9759 reponame:Anuário do Instituto de Geociências (Online) instname:Universidade Federal do Rio de Janeiro (UFRJ) instacron:UFRJ |
instname_str |
Universidade Federal do Rio de Janeiro (UFRJ) |
instacron_str |
UFRJ |
institution |
UFRJ |
reponame_str |
Anuário do Instituto de Geociências (Online) |
collection |
Anuário do Instituto de Geociências (Online) |
repository.name.fl_str_mv |
Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ) |
repository.mail.fl_str_mv |
anuario@igeo.ufrj.br|| |
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1797053539079421952 |