Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/223714 |
Resumo: | The turbidity currents are responsible for the formation of the major hydrocarbon reservoirs around the world; however the fundamentals of such currents, both in theory and practice, are still unexplored to exhaustion nowadays. The description of initialization, transportation and deposition mechanisms of this process is surrounded by uncertainty. These uncertainties had inspired the accomplishment of a three series of experiments, in order to investigate it using two different physicals models. It were analyzed the geometrical, dynamical and depositional features of a turbidity current attempting to match the results of physical modeling to those found in natural outcrop. Granular materials are tested and grain size ranges for simulation are evaluated. Density currents with different densities, grain sizes, fluid injection rate and volume were generated. Therefore density current evolution, current velocity, geometric features, and bed forms were registered. The results show that velocity increases for larger current densities or smaller grain sizes and that the height of the current head increases when the current density decreases. The deposition volumes present a general tendency of exponential decline; the grain size range of the deposits decreases towards the distal portion of the channel. The results also show that advancing velocity and bed forms (it was observed the successive development of planar upper flow regime surfaces, low sinuous-ripples, middle sinuous-ripples, meandering channels and linear channels) depend basically of the flow oscillations identified in the fluid injection rate. The simulations presented intended to collaborate with the understanding of the natural phenomena, relating the current behaviour (flow parameters) with the generated deposit (turbidites), as well as indicated the applicability of physical modelling on the field of deep-water sedimentation and its reliability as a tool for hydrocarbon reservoir prediction. |
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Manica, RafaelMaestri, Rogério DornellesBorges, Ana Luiza de Oliveira2021-07-13T04:38:54Z20061518-2398http://hdl.handle.net/10183/223714000614761The turbidity currents are responsible for the formation of the major hydrocarbon reservoirs around the world; however the fundamentals of such currents, both in theory and practice, are still unexplored to exhaustion nowadays. The description of initialization, transportation and deposition mechanisms of this process is surrounded by uncertainty. These uncertainties had inspired the accomplishment of a three series of experiments, in order to investigate it using two different physicals models. It were analyzed the geometrical, dynamical and depositional features of a turbidity current attempting to match the results of physical modeling to those found in natural outcrop. Granular materials are tested and grain size ranges for simulation are evaluated. Density currents with different densities, grain sizes, fluid injection rate and volume were generated. Therefore density current evolution, current velocity, geometric features, and bed forms were registered. The results show that velocity increases for larger current densities or smaller grain sizes and that the height of the current head increases when the current density decreases. The deposition volumes present a general tendency of exponential decline; the grain size range of the deposits decreases towards the distal portion of the channel. The results also show that advancing velocity and bed forms (it was observed the successive development of planar upper flow regime surfaces, low sinuous-ripples, middle sinuous-ripples, meandering channels and linear channels) depend basically of the flow oscillations identified in the fluid injection rate. The simulations presented intended to collaborate with the understanding of the natural phenomena, relating the current behaviour (flow parameters) with the generated deposit (turbidites), as well as indicated the applicability of physical modelling on the field of deep-water sedimentation and its reliability as a tool for hydrocarbon reservoir prediction.application/pdfporPesquisas em Geociências. Porto Alegre, RS. Vol. 33, n. 2 (2006), p. 19-33Correntes de turbidezCorrentes de densidadeModelos físicosTurbidity currentsPhysical simulationTurbiditesModelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticosinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT000614761.pdf.txt000614761.pdf.txtExtracted Texttext/plain52000http://www.lume.ufrgs.br/bitstream/10183/223714/2/000614761.pdf.txt1d89f88490058554c5858cb7893f7104MD52ORIGINAL000614761.pdfTexto completoapplication/pdf1597857http://www.lume.ufrgs.br/bitstream/10183/223714/1/000614761.pdfc12283c96e0505cdc2bbd8f7369b0553MD5110183/2237142021-08-18 04:36:47.915904oai:www.lume.ufrgs.br:10183/223714Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-08-18T07:36:47Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos |
title |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos |
spellingShingle |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos Manica, Rafael Correntes de turbidez Correntes de densidade Modelos físicos Turbidity currents Physical simulation Turbidites |
title_short |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos |
title_full |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos |
title_fullStr |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos |
title_full_unstemmed |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos |
title_sort |
Modelagem física de correntes de turbidez : descrição do processo e implicações no estudo dos depósitos turbidíticos |
author |
Manica, Rafael |
author_facet |
Manica, Rafael Maestri, Rogério Dornelles Borges, Ana Luiza de Oliveira |
author_role |
author |
author2 |
Maestri, Rogério Dornelles Borges, Ana Luiza de Oliveira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Manica, Rafael Maestri, Rogério Dornelles Borges, Ana Luiza de Oliveira |
dc.subject.por.fl_str_mv |
Correntes de turbidez Correntes de densidade Modelos físicos |
topic |
Correntes de turbidez Correntes de densidade Modelos físicos Turbidity currents Physical simulation Turbidites |
dc.subject.eng.fl_str_mv |
Turbidity currents Physical simulation Turbidites |
description |
The turbidity currents are responsible for the formation of the major hydrocarbon reservoirs around the world; however the fundamentals of such currents, both in theory and practice, are still unexplored to exhaustion nowadays. The description of initialization, transportation and deposition mechanisms of this process is surrounded by uncertainty. These uncertainties had inspired the accomplishment of a three series of experiments, in order to investigate it using two different physicals models. It were analyzed the geometrical, dynamical and depositional features of a turbidity current attempting to match the results of physical modeling to those found in natural outcrop. Granular materials are tested and grain size ranges for simulation are evaluated. Density currents with different densities, grain sizes, fluid injection rate and volume were generated. Therefore density current evolution, current velocity, geometric features, and bed forms were registered. The results show that velocity increases for larger current densities or smaller grain sizes and that the height of the current head increases when the current density decreases. The deposition volumes present a general tendency of exponential decline; the grain size range of the deposits decreases towards the distal portion of the channel. The results also show that advancing velocity and bed forms (it was observed the successive development of planar upper flow regime surfaces, low sinuous-ripples, middle sinuous-ripples, meandering channels and linear channels) depend basically of the flow oscillations identified in the fluid injection rate. The simulations presented intended to collaborate with the understanding of the natural phenomena, relating the current behaviour (flow parameters) with the generated deposit (turbidites), as well as indicated the applicability of physical modelling on the field of deep-water sedimentation and its reliability as a tool for hydrocarbon reservoir prediction. |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006 |
dc.date.accessioned.fl_str_mv |
2021-07-13T04:38:54Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/223714 |
dc.identifier.issn.pt_BR.fl_str_mv |
1518-2398 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000614761 |
identifier_str_mv |
1518-2398 000614761 |
url |
http://hdl.handle.net/10183/223714 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.ispartof.pt_BR.fl_str_mv |
Pesquisas em Geociências. Porto Alegre, RS. Vol. 33, n. 2 (2006), p. 19-33 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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