Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties
Lower Paleozoic source rock (SR) characteristics and paleo-depositional environments are not well understood in the Barents Sea region. Organic and inorganic geochemical analyses of 17 carbonaceous samples from the Lower Cambrian Tokammane Formation, the Lower to Middle Ordovician Kirtonryggen and V...
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ftoslouniv:oai:www.duo.uio.no:10852/97068 2023-05-15T14:27:23+02:00 Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties ENEngelskEnglishOrganic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties Abay, Tesfamariam Berhane Karlsen, Dag Arild Olaussen, Snorre Pedersen, Jon Halvard Hanken, Nils-Martin 2022-09-20T11:38:57Z http://hdl.handle.net/10852/97068 https://doi.org/10.1016/j.petrol.2022.111033 EN eng Abay, Tesfamariam Berhane Karlsen, Dag Arild Olaussen, Snorre Pedersen, Jon Halvard Hanken, Nils-Martin . Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties. Journal of Petroleum Science and Engineering. 2022 http://hdl.handle.net/10852/97068 2053443 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Petroleum Science and Engineering&rft.volume=&rft.spage=&rft.date=2022 Journal of Petroleum Science and Engineering 218 https://doi.org/10.1016/j.petrol.2022.111033 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0920-4105 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2022 ftoslouniv https://doi.org/10.1016/j.petrol.2022.111033 2022-10-12T22:35:45Z Lower Paleozoic source rock (SR) characteristics and paleo-depositional environments are not well understood in the Barents Sea region. Organic and inorganic geochemical analyses of 17 carbonaceous samples from the Lower Cambrian Tokammane Formation, the Lower to Middle Ordovician Kirtonryggen and Valhallfonna formations in Ny Friesland, north-east Spitsbergen, show that there is a striking difference in petroleum generation potential and bulk geochemical properties between the Cambrian and Ordovician samples, and also within the Ordovician samples. TOC contents of <0.20 wt% for the Lower Cambrian Tokammane Formation samples indicate poor source rock richness. TOC contents in the range between 0.3 and 2.1 wt% and HI values between 123 and 424 mg HC/g TOC for the Valhallfonna and Kirtonryggen formation samples suggest significant variation in remaining petroleum generation potential with oil-prone (Type II) to mixed oil- and gas-prone (Type II/III) kerogen. Source rock maturity parameters such as Tmax (range 435–449 °C) and production indices for most Ordovician samples suggest relatively uniform maturity levels, ranging from the early-, to the peak-, of the oil generation window (i.e. ca. 0.70–0.85% Ro). This maturity level could have significant implication on the original petroleum potential assuming early generation from carbonate source rocks. Bulk carbon isotope data show that the Lower Cambrian Tokammane Formation samples are heavier (δ13C range from −28.4 to −28.8‰) than the Lower to Middle Ordovician Valhallfonna Formation samples (δ13C range from −29.7 to −30.9‰). The differences in the source rock richness and kerogen type within the Ordovician samples are attributed to organic facies variation. Tentatively, three categories of source rock organic facies (B, BC and C) are supported based on assumed-initial hydrogen index values for the Ordovician samples. The reliability of the indicated organic facies could be supported by addition of biomarker data from bitumen extracts. To our knowledge, this is ... Article in Journal/Newspaper Arctic Arctic Barents Sea Ny Friesland Svalbard Spitsbergen Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Barents Sea Norway Ny Friesland ENVELOPE(16.847,16.847,79.498,79.498) Svalbard Valhallfonna ENVELOPE(17.566,17.566,79.743,79.743) Journal of Petroleum Science and Engineering 218 111033 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Lower Paleozoic source rock (SR) characteristics and paleo-depositional environments are not well understood in the Barents Sea region. Organic and inorganic geochemical analyses of 17 carbonaceous samples from the Lower Cambrian Tokammane Formation, the Lower to Middle Ordovician Kirtonryggen and Valhallfonna formations in Ny Friesland, north-east Spitsbergen, show that there is a striking difference in petroleum generation potential and bulk geochemical properties between the Cambrian and Ordovician samples, and also within the Ordovician samples. TOC contents of <0.20 wt% for the Lower Cambrian Tokammane Formation samples indicate poor source rock richness. TOC contents in the range between 0.3 and 2.1 wt% and HI values between 123 and 424 mg HC/g TOC for the Valhallfonna and Kirtonryggen formation samples suggest significant variation in remaining petroleum generation potential with oil-prone (Type II) to mixed oil- and gas-prone (Type II/III) kerogen. Source rock maturity parameters such as Tmax (range 435–449 °C) and production indices for most Ordovician samples suggest relatively uniform maturity levels, ranging from the early-, to the peak-, of the oil generation window (i.e. ca. 0.70–0.85% Ro). This maturity level could have significant implication on the original petroleum potential assuming early generation from carbonate source rocks. Bulk carbon isotope data show that the Lower Cambrian Tokammane Formation samples are heavier (δ13C range from −28.4 to −28.8‰) than the Lower to Middle Ordovician Valhallfonna Formation samples (δ13C range from −29.7 to −30.9‰). The differences in the source rock richness and kerogen type within the Ordovician samples are attributed to organic facies variation. Tentatively, three categories of source rock organic facies (B, BC and C) are supported based on assumed-initial hydrogen index values for the Ordovician samples. The reliability of the indicated organic facies could be supported by addition of biomarker data from bitumen extracts. To our knowledge, this is ... |
format |
Article in Journal/Newspaper |
author |
Abay, Tesfamariam Berhane Karlsen, Dag Arild Olaussen, Snorre Pedersen, Jon Halvard Hanken, Nils-Martin |
spellingShingle |
Abay, Tesfamariam Berhane Karlsen, Dag Arild Olaussen, Snorre Pedersen, Jon Halvard Hanken, Nils-Martin Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties |
author_facet |
Abay, Tesfamariam Berhane Karlsen, Dag Arild Olaussen, Snorre Pedersen, Jon Halvard Hanken, Nils-Martin |
author_sort |
Abay, Tesfamariam Berhane |
title |
Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties |
title_short |
Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties |
title_full |
Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties |
title_fullStr |
Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties |
title_full_unstemmed |
Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties |
title_sort |
organic geochemistry of cambro-ordovician succession of ny friesland, svalbard, high arctic norway: petroleum generation potential and bulk geochemical properties |
publishDate |
2022 |
url |
http://hdl.handle.net/10852/97068 https://doi.org/10.1016/j.petrol.2022.111033 |
long_lat |
ENVELOPE(16.847,16.847,79.498,79.498) ENVELOPE(17.566,17.566,79.743,79.743) |
geographic |
Arctic Barents Sea Norway Ny Friesland Svalbard Valhallfonna |
geographic_facet |
Arctic Barents Sea Norway Ny Friesland Svalbard Valhallfonna |
genre |
Arctic Arctic Barents Sea Ny Friesland Svalbard Spitsbergen |
genre_facet |
Arctic Arctic Barents Sea Ny Friesland Svalbard Spitsbergen |
op_source |
0920-4105 |
op_relation |
Abay, Tesfamariam Berhane Karlsen, Dag Arild Olaussen, Snorre Pedersen, Jon Halvard Hanken, Nils-Martin . Organic geochemistry of Cambro-Ordovician succession of Ny Friesland, Svalbard, High Arctic Norway: Petroleum generation potential and bulk geochemical properties. Journal of Petroleum Science and Engineering. 2022 http://hdl.handle.net/10852/97068 2053443 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Petroleum Science and Engineering&rft.volume=&rft.spage=&rft.date=2022 Journal of Petroleum Science and Engineering 218 https://doi.org/10.1016/j.petrol.2022.111033 |
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.petrol.2022.111033 |
container_title |
Journal of Petroleum Science and Engineering |
container_volume |
218 |
container_start_page |
111033 |
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1766301101999521792 |