Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock

Geologic carbon storage is widely recognized as a critical strategy for mitigating atmospheric carbon dioxide (CO2) levels, yet its effectiveness is contingent upon the integrity of caprock formations that prevent CO2 leakage. This study investigates the sealing potential of three representative cap...

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Autores: Kim, Hyunbin, Vilarrasa, Víctor, Makhnenko, Roman Y.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/394464
Acceso en línea:http://hdl.handle.net/10261/394464
Access Level:acceso abierto
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spelling Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous CaprockKim, HyunbinVilarrasa, VíctorMakhnenko, Roman Y.Geologic carbon storage is widely recognized as a critical strategy for mitigating atmospheric carbon dioxide (CO2) levels, yet its effectiveness is contingent upon the integrity of caprock formations that prevent CO2 leakage. This study investigates the sealing potential of three representative caprock formations—Eau Claire Shale, Maquoketa Shale, and Opalinus Clay—by employing a comprehensive set of experimental approaches. Laboratory assessments include permeability tests, stepwise CO2 injection, imbibition experiments, and porosimetry-based estimation to evaluate the sealing potential of heterogeneous geomaterials. It appears that within each formation, sand-rich specimens exhibit significantly higher permeability and lower breakthrough pressures compared to their clay-rich counterparts, underscoring the influence of the lithological variation. An indirect method based on pore structure analysis tends to underestimate the sealing capacity, highlighting discrepancies caused by the confinement, pore structure anisotropy, and variations in geochemical interactions. A statistical analysis based on the data set from this study and the literature reveals that CO2 breakthrough pressure is positively correlated with the clay content, negatively correlated with the permeability and dominant pore size, and independent of its porosity. The sealing number is introduced to provide a quantitative framework for evaluating the sealing integrity of the tested caprock formations to withstand buoyant forces. This study highlights the critical role of heterogeneities in determining caprock sealing potential and emphasizes the importance of direct measurements, particularly the use of the stepwise method, for accurate assessment. Advanced imaging and geophysical monitoring, coupled with multi-scale experiments, are recommended to enhance the reliability of heterogeneous caprock integrity assessments.H.K. and R.M. acknowledge support from the U.S. National Science Foundation Faculty Early Career Development Program CMMI-2239630. The caprock cores are provided by the Illinois State Geological Survey and swisstopo. V.V. acknowledges funding from the European Union's Horizon Europe Research and Innovation Programme through the Doctoral Network of the Marie Sklodowska-Curie Actions SMILE (https://smile-msca-dn.eu/), under Grant 101073281. IMEDEA is an accredited “Maria de Maeztu Excellence Unit” (Grant CEX2021-001198, funded by MICIU/AEI/10.13039/501100011033).With funding from the Spanish government through the "Maria de Maeztu Centre of Excellence" accreditation (CEX2021-001198).Peer reviewedAmerican Geophysical UnionNational Science Foundation (US)European CommissionMinisterio de Ciencia e Innovación (España)Agencia Estatal de Investigación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/394464reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/HE/101073281info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/CEX2021-001198Kim, Hyunbin; Makhnenko, Roman Y.; 2025; Dataset for Laboratory-scale assessment of CO2 sealing potential of heterogeneous caprock [Dataset]; Illinois Data Bank; Version 1; https://doi.org/10.13012/B2IDB-8394252_V1https://doi.org/10.1029/2025WR040339Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3944642026-05-22T06:33:51Z
dc.title.none.fl_str_mv Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
title Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
spellingShingle Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
Kim, Hyunbin
title_short Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
title_full Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
title_fullStr Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
title_full_unstemmed Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
title_sort Laboratory-Scale Assessment of CO2 Sealing Potential of Heterogeneous Caprock
dc.creator.none.fl_str_mv Kim, Hyunbin
Vilarrasa, Víctor
Makhnenko, Roman Y.
author Kim, Hyunbin
author_facet Kim, Hyunbin
Vilarrasa, Víctor
Makhnenko, Roman Y.
author_role author
author2 Vilarrasa, Víctor
Makhnenko, Roman Y.
author2_role author
author
dc.contributor.none.fl_str_mv National Science Foundation (US)
European Commission
Ministerio de Ciencia e Innovación (España)
Agencia Estatal de Investigación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Geologic carbon storage is widely recognized as a critical strategy for mitigating atmospheric carbon dioxide (CO2) levels, yet its effectiveness is contingent upon the integrity of caprock formations that prevent CO2 leakage. This study investigates the sealing potential of three representative caprock formations—Eau Claire Shale, Maquoketa Shale, and Opalinus Clay—by employing a comprehensive set of experimental approaches. Laboratory assessments include permeability tests, stepwise CO2 injection, imbibition experiments, and porosimetry-based estimation to evaluate the sealing potential of heterogeneous geomaterials. It appears that within each formation, sand-rich specimens exhibit significantly higher permeability and lower breakthrough pressures compared to their clay-rich counterparts, underscoring the influence of the lithological variation. An indirect method based on pore structure analysis tends to underestimate the sealing capacity, highlighting discrepancies caused by the confinement, pore structure anisotropy, and variations in geochemical interactions. A statistical analysis based on the data set from this study and the literature reveals that CO2 breakthrough pressure is positively correlated with the clay content, negatively correlated with the permeability and dominant pore size, and independent of its porosity. The sealing number is introduced to provide a quantitative framework for evaluating the sealing integrity of the tested caprock formations to withstand buoyant forces. This study highlights the critical role of heterogeneities in determining caprock sealing potential and emphasizes the importance of direct measurements, particularly the use of the stepwise method, for accurate assessment. Advanced imaging and geophysical monitoring, coupled with multi-scale experiments, are recommended to enhance the reliability of heterogeneous caprock integrity assessments.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/394464
url http://hdl.handle.net/10261/394464
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/HE/101073281
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/CEX2021-001198
Kim, Hyunbin; Makhnenko, Roman Y.; 2025; Dataset for Laboratory-scale assessment of CO2 sealing potential of heterogeneous caprock [Dataset]; Illinois Data Bank; Version 1; https://doi.org/10.13012/B2IDB-8394252_V1
https://doi.org/10.1029/2025WR040339
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
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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