Hide metadata

dc.date.accessioned2018-11-14T12:08:35Z
dc.date.available2018-11-14T12:08:35Z
dc.date.created2017-01-05T10:42:32Z
dc.date.issued2016
dc.identifier.citationPluymakers, Anne Marie Henriette Kobchenko, Maya Renard, Francois Marie Paul L . How microfracture roughness can be used to distinguish between exhumed cracks and in-situ flow paths in shales. Journal of Structural Geology. 2017, 94, 87-97
dc.identifier.urihttp://hdl.handle.net/10852/65516
dc.description.abstractFlow through fractures in shales is of importance to many geoengineering purposes. Shales are not only caprocks to hydrocarbon reservoirs and nuclear waste or CO2 storage sites, but also potential source and reservoir rocks for hydrocarbons. The presence of microfractures in shales controls their permeability and transport properties. Using X-ray micro-tomography and white light interferometry we scanned borehole samples obtained from 4 km depth in the Pomeranian shales in Poland. These samples contain open exhumation/drying cracks as well as intact vein-rock interfaces plus one striated slip surface. At micron resolution and above tensile drying cracks exhibit a power-law roughness with a scaling exponent, called the Hurst exponent H, of 0.3. At sub-micron resolution we capture the properties of the clay interface only, with H = 0.6. In contrast, the in-situ formed veins and slip surface exhibit H = 0.4–0.5, which is deemed representative for in-situ fractures. These results are discussed in relation to the shale microstructure and linear elastic fracture mechanics theory. The data imply that the Hurst roughness exponent can be used as a microstructural criterion to distinguish between exhumation and in-situ fractures, providing a step forward towards the characterization of potential flow paths at depth in shales.en_US
dc.languageEN
dc.publisherPergamon Press
dc.titleHow microfracture roughness can be used to distinguish between exhumed cracks and in-situ flow paths in shalesen_US
dc.typeJournal articleen_US
dc.creator.authorPluymakers, Anne Marie Henriette
dc.creator.authorKobchenko, Maya
dc.creator.authorRenard, Francois Marie Paul L
cristin.unitcode185,15,4,10
cristin.unitnameKondenserte fasers fysikk
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode2
dc.identifier.cristin1421415
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 Structural Geology&rft.volume=94&rft.spage=87&rft.date=2017
dc.identifier.jtitleJournal of Structural Geology
dc.identifier.volume94
dc.identifier.startpage87
dc.identifier.endpage97
dc.identifier.doihttp://dx.doi.org/10.1016/j.jsg.2016.11.005
dc.identifier.urnURN:NBN:no-68043
dc.type.documentTidsskriftartikkelen_US
dc.source.issn0191-8141
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/65516/1/Pluymakers%2Bet%2B_JSG%2B2017.pdf
dc.type.versionSubmittedVersion


Files in this item

Appears in the following Collection

Hide metadata