Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers

Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers

38 páginas, 11 figuras.

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Main Authors: Vilarrasa, Víctor, Bolster, Diogo, Olivella, Sebastià, Carrera, Jesús
Format: artículo biblioteca
Language:English
Published: Elsevier 2010
Online Access:http://hdl.handle.net/10261/42090
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spelling dig-idaea-es-10261-420902022-07-16T00:55:30Z Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers Vilarrasa, Víctor Bolster, Diogo Olivella, Sebastià Carrera, Jesús 38 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 reviewed 2011-11-04T12:14:09Z 2011-11-04T12:14:09Z 2010 artículo http://purl.org/coar/resource_type/c_6501 International Journal of Greenhouse Gas Control 4 (6): 910-919 (2010) 17505836 http://hdl.handle.net/10261/42090 10.1016/j.ijggc.2010.06.006 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/227286 http://dx.doi.org/10.1016/j.ijggc.2010.06.006 open Elsevier
institution IDAEA ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-idaea-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IDAEA España
language English
description 38 páginas, 11 figuras.
format artículo
author Vilarrasa, Víctor
Bolster, Diogo
Olivella, Sebastià
Carrera, Jesús
spellingShingle Vilarrasa, Víctor
Bolster, Diogo
Olivella, Sebastià
Carrera, Jesús
Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
author_facet Vilarrasa, Víctor
Bolster, Diogo
Olivella, Sebastià
Carrera, Jesús
author_sort Vilarrasa, Víctor
title Coupled hydromechanical modeling of CO2 sequestration in deep saline aquifers
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
publisher Elsevier
publishDate 2010
url http://hdl.handle.net/10261/42090
work_keys_str_mv AT vilarrasavictor coupledhydromechanicalmodelingofco2sequestrationindeepsalineaquifers
AT bolsterdiogo coupledhydromechanicalmodelingofco2sequestrationindeepsalineaquifers
AT olivellasebastia coupledhydromechanicalmodelingofco2sequestrationindeepsalineaquifers
AT carrerajesus coupledhydromechanicalmodelingofco2sequestrationindeepsalineaquifers
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