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dc.date.accessioned2018-09-04T10:13:51Z
dc.date.available2018-09-04T10:13:51Z
dc.date.created2017-07-10T13:28:15Z
dc.date.issued2017
dc.identifier.citationTomac, Ingrid Gutierrez, Marte . Coupled hydro-thermo-mechanical modeling of hydraulic fracturing in quasi-brittle rocks using BPM-DEM. Journal of Rock Mechanics and Geotechnical Engineering. 2017, 9(1), 92-104
dc.identifier.urihttp://hdl.handle.net/10852/64098
dc.description.abstractThis paper presents an improved understanding of coupled hydro-thermo-mechanical (HTM) hydraulic fracturing of quasi-brittle rock using the bonded particle model (BPM) within the discrete element method (DEM). BPM has been recently extended by the authors to account for coupled convective–conductive heat flow and transport, and to enable full hydro-thermal fluid–solid coupled modeling. The application of the work is on enhanced geothermal systems (EGSs), and hydraulic fracturing of hot dry rock (HDR) is studied in terms of the impact of temperature difference between rock and a flowing fracturing fluid. Micro-mechanical investigation of temperature and fracturing fluid effects on hydraulic fracturing damage in rocks is presented. It was found that fracture is shorter with pronounced secondary microcracking along the main fracture for the case when the convective–conductive thermal heat exchange is considered. First, the convection heat exchange during low-viscosity fluid infiltration in permeable rock around the wellbore causes significant rock cooling, where a finger-like fluid infiltration was observed. Second, fluid infiltration inhibits pressure rise during pumping and delays fracture initiation and propagation. Additionally, thermal damage occurs in the whole area around the wellbore due to rock cooling and cold fluid infiltration. The size of a damaged area around the wellbore increases with decreasing fluid dynamic viscosity. Fluid and rock compressibility ratio was found to have significant effect on the fracture propagation velocity.en_US
dc.languageEN
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleCoupled hydro-thermo-mechanical modeling of hydraulic fracturing in quasi-brittle rocks using BPM-DEMen_US
dc.typeJournal articleen_US
dc.creator.authorTomac, Ingrid
dc.creator.authorGutierrez, Marte
cristin.unitcode185,15,22,0
cristin.unitnameInstitutt for geofag
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1481745
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Rock Mechanics and Geotechnical Engineering&rft.volume=9&rft.spage=92&rft.date=2017
dc.identifier.jtitleJournal of Rock Mechanics and Geotechnical Engineering
dc.identifier.volume9
dc.identifier.issue1
dc.identifier.startpage92
dc.identifier.endpage104
dc.identifier.doihttp://dx.doi.org/10.1016/j.jrmge.2016.10.001
dc.identifier.urnURN:NBN:no-66640
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn1674-7755
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/64098/1/1-s2.0-S1674775516302116-main.pdf
dc.type.versionPublishedVersion


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