Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf
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 expulsio...
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ftoslouniv:oai:www.duo.uio.no:10852/99326 2023-05-15T15:39:05+02:00 Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf ENEngelskEnglishMultiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf Johnson, James Ronald Kobchenko, Maya Mondol, Nazmul Haque Renard, Francois 2022-05-23T12:53:36Z http://hdl.handle.net/10852/99326 https://doi.org/10.1016/j.coal.2022.103954 EN eng NFR/267775 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 http://hdl.handle.net/10852/99326 2026508 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 International Journal of Coal Geology 253 18 https://doi.org/10.1016/j.coal.2022.103954 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0166-5162 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2022 ftoslouniv https://doi.org/10.1016/j.coal.2022.103954 2023-02-01T23:36:26Z 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. Article in Journal/Newspaper Barents Sea Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Barents Sea Seal Rocks ENVELOPE(-57.282,-57.282,50.783,50.783) International Journal of Coal Geology 253 103954 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Johnson, James Ronald Kobchenko, Maya Mondol, Nazmul Haque Renard, Francois |
spellingShingle |
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 |
author_facet |
Johnson, James Ronald Kobchenko, Maya Mondol, Nazmul Haque Renard, Francois |
author_sort |
Johnson, James Ronald |
title |
Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf |
title_short |
Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf |
title_full |
Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf |
title_fullStr |
Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf |
title_full_unstemmed |
Multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the Norwegian Continental Shelf |
title_sort |
multiscale synchrotron microtomography imaging of kerogen lenses in organic-rich shales from the norwegian continental shelf |
publishDate |
2022 |
url |
http://hdl.handle.net/10852/99326 https://doi.org/10.1016/j.coal.2022.103954 |
long_lat |
ENVELOPE(-57.282,-57.282,50.783,50.783) |
geographic |
Barents Sea Seal Rocks |
geographic_facet |
Barents Sea Seal Rocks |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
0166-5162 |
op_relation |
NFR/267775 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 http://hdl.handle.net/10852/99326 2026508 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 International Journal of Coal Geology 253 18 https://doi.org/10.1016/j.coal.2022.103954 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.coal.2022.103954 |
container_title |
International Journal of Coal Geology |
container_volume |
253 |
container_start_page |
103954 |
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1766370513811144704 |