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dc.date.accessioned2018-08-08T12:44:01Z
dc.date.available2018-11-12T23:31:15Z
dc.date.created2017-06-30T11:24:59Z
dc.date.issued2017
dc.identifier.citationTeixeira, Marcello Goulart Donze, Frederic Renard, Francois Panahi, Hamed Papachristos, Efthymios Scholtes, Luc . Microfracturing during primary migration in shales. Tectonophysics. 2017, 694, 268-279
dc.identifier.urihttp://hdl.handle.net/10852/62750
dc.description.abstractIn several geological environments, chemical reactions are coupled to rock deformation and the associated stresses induced locally interact with the far field loading. This is the case in immature shales that undergo burial and diagenesis, where the organic matter evolves with temperature into hydrocarbons which induces local volume expansion. At large scale, this mechanism is responsible for the transport of hydrocarbons from source to reservoir rocks, a process referred to as primary migration. However, how the interactions between local fluid production, microfracturing, and transport are coupled remain to be understood. Here, we analyze this coupling phenomenon by developing a discrete element model where the generation of local overpressures occurring in kerogen patches is simulated, while the surrounding rock is subjected to external loading. It is shown that, due to local fluid overpressure; microfracturing occurs and brings the fluids to migrate through the medium. The numerical results are confirmed by laboratory experiments where the network of microfractures induced in an immature Green River shale sample heated under small differential stress was imaged in three dimensions using X-ray microtomography. Moreover, the numerical simulations identify that the state of differential stress and the initial kerogen distribution constitute two key parameters that control the formation of the three-dimensional percolating microfracture network and could thus explain primary migration in shale rocks.en_US
dc.languageEN
dc.titleMicrofracturing during primary migration in shalesen_US
dc.typeJournal articleen_US
dc.creator.authorTeixeira, Marcello Goulart
dc.creator.authorDonze, Frederic
dc.creator.authorRenard, Francois
dc.creator.authorPanahi, Hamed
dc.creator.authorPapachristos, Efthymios
dc.creator.authorScholtes, Luc
cristin.unitcode185,15,22,20
cristin.unitnameGEO Physics of Geological processes
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode1
dc.identifier.cristin1480079
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tectonophysics&rft.volume=694&rft.spage=268&rft.date=2017
dc.identifier.jtitleTectonophysics
dc.identifier.volume694
dc.identifier.startpage268
dc.identifier.endpage279
dc.identifier.doihttp://dx.doi.org/10.1016/j.tecto.2016.11.010
dc.identifier.urnURN:NBN:no-65324
dc.type.documentTidsskriftartikkelen_US
dc.source.issn0040-1951
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/62750/2/2017_Tectonophysics_GoulartTexeira_InPress.pdf
dc.type.versionSubmittedVersion


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