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dc.contributor.authorBjørge, Ruben
dc.contributor.authorGawel, Kamila
dc.contributor.authorChavez Panduro, Elvia Anabela
dc.contributor.authorTorsæter, Malin
dc.date.accessioned2019-09-26T11:40:13Z
dc.date.available2019-09-26T11:40:13Z
dc.date.created2019-04-30T12:03:43Z
dc.date.issued2019
dc.identifier.citationInternational Journal of Greenhouse Gas Control. 2019, 82 261-268.nb_NO
dc.identifier.issn1750-5836
dc.identifier.urihttp://hdl.handle.net/11250/2618970
dc.description.abstractCements for well environments with temperatures above 110 °C are typically designed with silica additions. This is the case for many of the wells in the North Sea, which is a region promising for large-scale geological storage of CO2 from European sources. Wells are probable leakage paths in carbon capture and storage (CCS) projects, and it is therefore important to understand how CO2 interacts with cement under downhole conditions. In this study, microstructural changes associated with carbonation of cement with and without silica were followed using micro-computed tomography, X-ray diffraction and scanning electron microscopy. The rims of the cement cores exposed to CO2-saturated brine consisted of a carbonated region and a bicarbonated region. In the silica cement sample, the carbonated region consisted of two distinct layers with a rough interface region containing wormhole-like features. The formation of these two layers in the silica cement is proposed to be due to calcium carbonate dissolution and re-precipitation during exposure to CO2-saturated brine. The results illustrate the importance of the effect of additives for offshore CO2-storage well integrity.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleCarbonation of silica cement at high-temperature well conditionsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber261-268nb_NO
dc.source.volume82nb_NO
dc.source.journalInternational Journal of Greenhouse Gas Controlnb_NO
dc.identifier.doi10.1016/j.ijggc.2019.01.011
dc.identifier.cristin1694732
dc.description.localcode© 2019. This is the authors’ accepted and refereed manuscript to the article. Locked until 25.1.2021 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/nb_NO
cristin.unitcode194,66,20,0
cristin.unitnameInstitutt for fysikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal