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dc.contributor.authorRongved, Mats
dc.contributor.authorCerasi, Pierre
dc.date.accessioned2020-05-06T07:40:41Z
dc.date.available2020-05-06T07:40:41Z
dc.date.created2019-10-09T14:16:19Z
dc.date.issued2019
dc.identifier.issn1996-1073
dc.identifier.urihttps://hdl.handle.net/11250/2653416
dc.description.abstractCO2 sequestration projects will in the coming years include both aquifer and depleted oil and gas field sites, with different stress paths and history. Stress changes and stress concentration effects on faults will have to be readily assessed, potentially endangering shallower permeable formations. Usually, a fault is modeled as a singularity with shear strength or friction properties, and simulations are run to determine whether the fault is reactivated through shear failure. In this paper, we model a simple rectilinear fault as a finite surface with lowered mechanical properties compared to elsewhere in the domain, which represents a fractured zone alongside the fault core. SINTEF’s Modified Discrete Element code is used coupled to the flow simulator TOUGH2, to model the fracture initiation and propagation, monitoring the permeability increase along the fault. A simplified scenario is simulated, with a sandstone storage reservoir bounded by a fault, penetrating a shale caprock to a shallower sandstone layer. The storage site either undergoes depletion before CO2 injection or has its pore pressure increased to simulate the case of aquifer storage. Results show that during depletion, shear stresses may develop such that fractures propagate alongside the fault to the upper aquifer. However, for the mirror fault orientation with regards to verticality, no such fractures develop. These results are reversed for the aquifer storage case.en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectCO2 storageen_US
dc.subjectStressen_US
dc.subjectHysteresisen_US
dc.subjectPore pressureen_US
dc.subjectPermeabilityen_US
dc.titleSimulation of stress hysteresis effect on permeability increase risk along a faulten_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citeden_US
dc.source.volume12en_US
dc.source.journalEnergiesen_US
dc.source.issue18en_US
dc.identifier.doi10.3390/en12183458
dc.identifier.cristin1735540
cristin.unitcode7401,80,7,0
cristin.unitnamePetroleum
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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