dc.date.accessioned | 2023-01-27T17:42:20Z | |
dc.date.available | 2023-01-27T17:42:20Z | |
dc.date.created | 2022-05-23T12:53:36Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Johnson, James Ronald Kobchenko, Maya Mondol, Nazmul Haque Renard, Francois . Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf. International Journal of Coal Geology. 2022, 253 | |
dc.identifier.uri | http://hdl.handle.net/10852/99326 | |
dc.description.abstract | Kerogen lens shape and size distribution control how organic-rich shales may behave as either source or seal rocks. Prior to thermal conversion, kerogen is a brittle, load-bearing constituent of the shale matrix. During thermal maturation, kerogen lenses become more ductile, and hydrocarbon expulsion may lead to the creation of microfractures, a process controlled not only by temperature and pressure but also by the size and shape of kerogen lenses and their total content in the rock. Here, we use high-resolution multiscale synchrotron microtomography imaging of centimeter-scale shale rock samples collected in two boreholes at different depths in the North Sea and the Barents Sea, respectively. From these three-dimensional microtomography data, we quantify the various shapes of kerogen lenses and discuss how each step of a kerogen lens's life-cycle (i.e. original biological structure, deposition, degradation, and diagenesis) impacted its shape before catagenesis. We quantify the relationship between kerogen volume and the number of kerogen lenses in a given rock volume. The relationship between total organic carbon (TOC) content and the average kerogen lens volume is also measured. For a given rock volume, results show that organic content increases with the number of kerogen lenses up to a point (~8–12 wt% TOC) above which TOC continues to increase, but the number of kerogen lenses decreases. These results combined with kerogen lens orientation may control microfracturing during kerogen maturation. | |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf | |
dc.title.alternative | ENEngelskEnglishMultiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf | |
dc.type | Journal article | |
dc.creator.author | Johnson, James Ronald | |
dc.creator.author | Kobchenko, Maya | |
dc.creator.author | Mondol, Nazmul Haque | |
dc.creator.author | Renard, Francois | |
cristin.unitcode | 185,15,22,0 | |
cristin.unitname | Institutt for geofag | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 2026508 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=International Journal of Coal Geology&rft.volume=253&rft.spage=&rft.date=2022 | |
dc.identifier.jtitle | International Journal of Coal Geology | |
dc.identifier.volume | 253 | |
dc.identifier.pagecount | 18 | |
dc.identifier.doi | https://doi.org/10.1016/j.coal.2022.103954 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0166-5162 | |
dc.type.version | PublishedVersion | |
cristin.articleid | 103954 | |
dc.relation.project | NFR/267775 | |