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dc.contributor.authorAlmenningen, Stian
dc.contributor.authorHussain, Arif
dc.contributor.authorBetlem, Peter
dc.contributor.authorRoy, Srikumar
dc.contributor.authorSenger, Kim
dc.contributor.authorErsland, Geir
dc.date.accessioned2020-03-13T13:26:29Z
dc.date.available2020-03-13T13:26:29Z
dc.date.issued2019-10
dc.PublishedAlmenningen S, Hussain, Betlem P, Roy S, Senger K, Ersland G. Demonstrating the potential of CO2 hydrate self-sealing in Svalbard, Arctic Norway. International Journal of Greenhouse Gas Control. 2019;89:1-8eng
dc.identifier.issn1750-5836en_US
dc.identifier.issn1878-0148en_US
dc.identifier.urihttps://hdl.handle.net/1956/21492
dc.description.abstractHere we report the potential self-sealing properties of CO2 hydrate for the Longyearbyen CO2 Lab’s shallow aquifer in Svalbard, Arctic Norway, through hydrate formation experiments. The experiments were conducted on a 9 cm long core plug of a fluvio-deltaic sandstone of the Barremian Helvetiafjellet Formation recovered from a fully-cored research well in Adventdalen in Svalbard at a depth of 187 m. CO2 injection into the brine-filled (1.0 wt.% NaCl) core plug was conducted at realistic reservoir conditions; the pore pressure was 20 bar and the temperature was 0.1 °C. Solid CO2 hydrate formed in the core plug after injecting 0.40 pore volumes (frac.) of CO2 and immediately reduced the apparent permeability to zero. A differential pressure across the core plug of 18 bar (200 bar/m) was sustained for 250 h without producing any CO2 from the core plug. This demonstrates the potential of CO2 hydrate formation as a secondary seal in settings with favorable CO2 hydrate formation conditions in or above the reservoir. The results further indicate that the self-sealing nature of CO2 hydrate should be considered while characterizing carbon sequestration reservoirs in both marine and permafrost-affected settings.en_US
dc.language.isoengeng
dc.publisherElsevieren_US
dc.rightsAttribution CC BY-NC-NDeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/eng
dc.titleDemonstrating the potential of CO2 hydrate self-sealing in Svalbard, Arctic Norwayen_US
dc.typePeer reviewed
dc.typeJournal article
dc.date.updated2020-01-24T09:04:25Z
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.identifier.doihttps://doi.org/10.1016/j.ijggc.2019.06.010
dc.identifier.cristin1722014
dc.source.journalInternational Journal of Greenhouse Gas Control
dc.relation.projectNorges forskningsråd: 257579


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