CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF
Recent discoveries of hydrocarbons along the western margin of the Norwegian Barents Shelf have emphasised the need for a better understanding of the source rock potential of the Upper Palaeozoic succession. In this study, a comprehensive set of organic geochemical data have been collected from the...
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crwiley:10.1111/jpg.12724 2024-06-23T07:57:05+00:00 CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF Nicolaisen, J. B. Elvebakk, G. Ahokas, J. Bojesen‐Koefoed, J. A. Olaussen, S. Rinna, J. Skeie, J. E. Stemmerik, L. 2018 http://dx.doi.org/10.1111/jpg.12724 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpg.12724 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpg.12724 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jpg.12724 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Petroleum Geology volume 42, issue 1, page 59-78 ISSN 0141-6421 1747-5457 journal-article 2018 crwiley https://doi.org/10.1111/jpg.12724 2024-06-13T04:24:36Z Recent discoveries of hydrocarbons along the western margin of the Norwegian Barents Shelf have emphasised the need for a better understanding of the source rock potential of the Upper Palaeozoic succession. In this study, a comprehensive set of organic geochemical data have been collected from the Carboniferous – Permian interval outcropping on Svalbard in order to re‐assess the offshore potential. Four stratigraphic levels with organic‐rich facies have been identified: (i) Lower Carboniferous (Mississippian) fluvio‐lacustrine intervals with TOC between 1 and 75 wt.% and a cumulative organic‐rich section more than 100 m thick; (ii) Upper Carboniferous (Pennsylvanian) evaporite‐associated marine shales and organic‐rich carbonates with TOC up to 20 wt.%; (iii) a widespread lowermost Permian organic‐rich carbonate unit, 2–10 m thick, with 1–10 wt. % TOC; and (iv) Lower Permian organic‐rich marine shales with an average TOC content of 10 wt.%. Petroleum can potentially be tied to organic‐rich facies at formation level based on the gammacerane index, δ 13 C of the aromatic fraction and/or the Pr/Ph ratio. Relatively heavy δ 13 C values, a low gammacerane index and high Pr/Ph ratios characterize Lower Carboniferous non‐marine sediments, whereas evaporite‐associated facies have lighter δ 13 C, a higher gammacerane index and lower Pr/Ph ratios. Article in Journal/Newspaper Svalbard Wiley Online Library Svalbard Journal of Petroleum Geology 42 1 59 78 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Recent discoveries of hydrocarbons along the western margin of the Norwegian Barents Shelf have emphasised the need for a better understanding of the source rock potential of the Upper Palaeozoic succession. In this study, a comprehensive set of organic geochemical data have been collected from the Carboniferous – Permian interval outcropping on Svalbard in order to re‐assess the offshore potential. Four stratigraphic levels with organic‐rich facies have been identified: (i) Lower Carboniferous (Mississippian) fluvio‐lacustrine intervals with TOC between 1 and 75 wt.% and a cumulative organic‐rich section more than 100 m thick; (ii) Upper Carboniferous (Pennsylvanian) evaporite‐associated marine shales and organic‐rich carbonates with TOC up to 20 wt.%; (iii) a widespread lowermost Permian organic‐rich carbonate unit, 2–10 m thick, with 1–10 wt. % TOC; and (iv) Lower Permian organic‐rich marine shales with an average TOC content of 10 wt.%. Petroleum can potentially be tied to organic‐rich facies at formation level based on the gammacerane index, δ 13 C of the aromatic fraction and/or the Pr/Ph ratio. Relatively heavy δ 13 C values, a low gammacerane index and high Pr/Ph ratios characterize Lower Carboniferous non‐marine sediments, whereas evaporite‐associated facies have lighter δ 13 C, a higher gammacerane index and lower Pr/Ph ratios. |
format |
Article in Journal/Newspaper |
author |
Nicolaisen, J. B. Elvebakk, G. Ahokas, J. Bojesen‐Koefoed, J. A. Olaussen, S. Rinna, J. Skeie, J. E. Stemmerik, L. |
spellingShingle |
Nicolaisen, J. B. Elvebakk, G. Ahokas, J. Bojesen‐Koefoed, J. A. Olaussen, S. Rinna, J. Skeie, J. E. Stemmerik, L. CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF |
author_facet |
Nicolaisen, J. B. Elvebakk, G. Ahokas, J. Bojesen‐Koefoed, J. A. Olaussen, S. Rinna, J. Skeie, J. E. Stemmerik, L. |
author_sort |
Nicolaisen, J. B. |
title |
CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF |
title_short |
CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF |
title_full |
CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF |
title_fullStr |
CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF |
title_full_unstemmed |
CHARACTERIZATION OF UPPER PALAEOZOIC ORGANIC‐RICH UNITS IN SVALBARD: IMPLICATIONS FOR THE PETROLEUM SYSTEMS OF THE NORWEGIAN BARENTS SHELF |
title_sort |
characterization of upper palaeozoic organic‐rich units in svalbard: implications for the petroleum systems of the norwegian barents shelf |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/jpg.12724 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpg.12724 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpg.12724 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jpg.12724 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
Journal of Petroleum Geology volume 42, issue 1, page 59-78 ISSN 0141-6421 1747-5457 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jpg.12724 |
container_title |
Journal of Petroleum Geology |
container_volume |
42 |
container_issue |
1 |
container_start_page |
59 |
op_container_end_page |
78 |
_version_ |
1802650541797408768 |