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dc.contributor.authorChavez Panduro, Elvia Anabela
dc.contributor.authorCordonnier, Benoit
dc.contributor.authorGawel, Kamila
dc.contributor.authorBørve, Ingrid
dc.contributor.authorIyer, Jaisree
dc.contributor.authorCarroll, Susan
dc.contributor.authorMichels, Leander
dc.contributor.authorRogowska, Melania
dc.contributor.authorMcBeck, Jessica Ann
dc.contributor.authorSørensen, Henning
dc.contributor.authorWalsh, Stuart
dc.contributor.authorRenard, Francois
dc.contributor.authorGibaud, Alain
dc.contributor.authorTorsæter, Malin
dc.contributor.authorBreiby, Dag Werner
dc.identifier.citationEnvironmental Science and Technology. 2020, 54 (13), 8323-8332.en_US
dc.description.abstractDepleted oil reservoirs are considered a viable solution to the global challenge of CO2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, CO2 is in its supercritical state, and the high pressures and temperatures involved make real-time microscopic observations of cement degradation experimentally challenging. Here, we present an in situ 3D dynamic X-ray micro computed tomography (μ-CT) study of well cement carbonation at realistic reservoir stress, pore-pressure, and temperature conditions. The high-resolution time-lapse 3D images allow monitoring the progress of reaction fronts in Portland cement, including density changes, sample deformation, and mineral precipitation and dissolution. By switching between flow and nonflow conditions of CO2-saturated water through cement, we were able to delineate regimes dominated by calcium carbonate precipitation and dissolution. For the first time, we demonstrate experimentally the impact of the flow history on CO2 leakage risk for cement plugging. In-situ μ-CT experiments combined with geochemical modeling provide unique insight into the interactions between CO2 and cement, potentially helping in assessing the risks of CO2 storage in geological reservoirs.en_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleReal Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditionsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400en_US
dc.subject.nsiVDP::Mathematics and natural scienses: 400en_US
dc.source.journalEnvironmental Science and Technologyen_US
dc.relation.projectNorges forskningsråd: 275182en_US
dc.relation.projectNorges forskningsråd: 262644en_US
dc.relation.projectNorges forskningsråd: 267775en_US
dc.relation.projectNorges forskningsråd: 243765en_US
dc.description.localcodeThis is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal