Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers

38 páginas, 11 figuras.

Detalhes bibliográficos
Autores: Vilarrasa, Víctor, Bolster, Diogo, Olivella, Sebastià, Carrera, Jesús
Formato: artículo
Fecha de publicación:2010
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/42090
Acesso em linha:http://hdl.handle.net/10261/42090
Access Level:acceso abierto
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spelling Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifersVilarrasa, VíctorBolster, DiogoOlivella, SebastiàCarrera, Jesús38 páginas, 11 figuras.Sequestration of carbon dioxide (CO2) in deep saline aquifers has emerged as an option for reducing greenhouse gas emissions to the atmosphere. The large amounts of supercritical CO2 that need to be injected into deep saline aquifers may cause large fluid pressure increases. The resulting overpressure may promote reactivation of sealed fractures or the creation of new ones in the caprock seal. This could lead to escape routes for CO2. In order to assess the probability of such an event, we model an axisymmetric horizontal aquifer-caprock system, including hydromechanical coupling. We study the failure mechanisms, using a viscoplastic approach. Simulations illustrate that, depending on boundary conditions, the least favorable moment takes place at the beginning of injection. Initially, fluid pressure rises sharply because of a reduction in permeability due to desaturation. Once CO2 fills the pores in the vicinity of the injection well and a capillary fringe is fully developed, the less viscous CO2 displaces the brine and the capillary fringe laterally. The overpressure caused by the permeability reduction within the capillary fringe due to desaturation decreases with distance from the injection well. This results in a drop in fluid pressure buildup with time, which leads to a safer situation. Nevertheless, in the presence of low-permeability boundaries, fluid pressure continues to rise in the whole aquifer. This occurs when the radius of influence of the injection reaches the outer boundary. Thus, caprock integrity might be compromised in the long term.V.V. and D.B. would like to acknowledge the Spanish Ministry of Science and Innovation (MIC) for financial support through the “Formación de Profesorado Universitario” and “Juan de la Cierva” programs. V.V. also wishes to acknowledge the “Colegio de Ingenieros de Caminos, Canales y Puertos – Catalunya” for their financial support. This project has been funded by the Spanish Ministry of Science and Innovation through the CIUDEN project (Ref.: 030102080014), and through the MUSTANG project, from the European Community’s Seventh Framework Programme FP7/2007-2013 under grant agreement nº 227286.Peer reviewedElsevier201120112010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/42090reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/227286http://dx.doi.org/10.1016/j.ijggc.2010.06.006info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/420902026-05-22T06:33:51Z
dc.title.none.fl_str_mv Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
title Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
spellingShingle Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
Vilarrasa, Víctor
title_short Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
title_full Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
title_fullStr Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
title_full_unstemmed Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
title_sort Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
dc.creator.none.fl_str_mv Vilarrasa, Víctor
Bolster, Diogo
Olivella, Sebastià
Carrera, Jesús
author Vilarrasa, Víctor
author_facet Vilarrasa, Víctor
Bolster, Diogo
Olivella, Sebastià
Carrera, Jesús
author_role author
author2 Bolster, Diogo
Olivella, Sebastià
Carrera, Jesús
author2_role author
author
author
description 38 páginas, 11 figuras.
publishDate 2010
dc.date.none.fl_str_mv 2010
2011
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/42090
url http://hdl.handle.net/10261/42090
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/227286
http://dx.doi.org/10.1016/j.ijggc.2010.06.006
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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