Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments
The petroleum generation potential of Upper Jurassic to Lower Cretaceous organic rich shales from the southwestern Barents Sea was evaluated using bulk and quantitative pyrolysis analysis. Fifteen thermally-immature samples from the Hekkingen Formation with differing organic facies, as defined by ma...
Published in: | Marine and Petroleum Geology |
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Elsevier Ltd.
2021
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Online Access: | https://hdl.handle.net/11250/2827310 https://doi.org/10.1016/j.marpetgeo.2021.105343 |
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ftunivstavanger:oai:uis.brage.unit.no:11250/2827310 2023-06-11T04:10:33+02:00 Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments Cedeno Motta, Andres Felipe Ohm, Sverre Ekrene Escalona Varela, Alejandro Marin Restrepo, Dora Luz Olaussen, Snorre Demchuk, Thomas 2021-10-15T23:29:59Z application/pdf https://hdl.handle.net/11250/2827310 https://doi.org/10.1016/j.marpetgeo.2021.105343 eng eng Elsevier Ltd. Cedeño, A., Ohm, S., Escalona, A. et al. (2021) Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments. Marine and Petroleum Geology, 134, 105343 urn:issn:0264-8172 https://hdl.handle.net/11250/2827310 https://doi.org/10.1016/j.marpetgeo.2021.105343 cristin:1946363 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2021 134 Marine and Petroleum Geology petroleumsgeologi VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 Peer reviewed Journal article 2021 ftunivstavanger https://doi.org/10.1016/j.marpetgeo.2021.105343 2023-05-29T16:03:16Z The petroleum generation potential of Upper Jurassic to Lower Cretaceous organic rich shales from the southwestern Barents Sea was evaluated using bulk and quantitative pyrolysis analysis. Fifteen thermally-immature samples from the Hekkingen Formation with differing organic facies, as defined by maceral composition, were subjected to total organic carbon, Rock-Eval pyrolysis, pyrolysis gas chromatography, bulk kinetics, and micro-scale sealed vessel pyrolysis analyses. The results were employed to characterize differences in source rock kerogens, gross petroleum type, and the compositional evolution of the generated fluids as well as their physical properties (i.e. gas to oil ratio, saturation pressure, and formation volume factor) as a function of increasing maturity. The investigated samples contain varying proportions of kerogen type II and III. Heterogeneities in the kerogen composition result in different orders of thermal stability, with the onset of petroleum generation predicted to occur over a high and broad temperature range from 123 °C to 144 °C (at 3.3C⁰/Ma). Reduced kerogen stability associated with elevated sulfur contents is only documented in a few samples. Most of the analyzed samples have the potential to generate low GOR oils of an intermediate to aromatic, low wax paraffinic-naphthenic-aromatic (P–N-A) composition and variable amounts of wet gas. Petroleums of similar compositional and physical properties are predicted to have been generated from the natural maturation sequence of various organic facies in thermally mature areas of the Hammerfest Basin and the Ringvassøy-Loppa High and Bjørnøyrenna fault complexes. Vitrinite-rich sources in the Fingerdjupet Sub-basin and the Troms-Finnmark Fault Complex have potential for gas and condensate generation. publishedVersion Article in Journal/Newspaper Barents Sea Berg Finnmark Hammerfest Hammerfest Basin Loppa Finnmark Troms University of Stavanger: UiS Brage Barents Sea Hekkingen ENVELOPE(17.832,17.832,69.597,69.597) Loppa ENVELOPE(22.351,22.351,70.240,70.240) Marine and Petroleum Geology 134 105343 |
institution |
Open Polar |
collection |
University of Stavanger: UiS Brage |
op_collection_id |
ftunivstavanger |
language |
English |
topic |
petroleumsgeologi VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 |
spellingShingle |
petroleumsgeologi VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 Cedeno Motta, Andres Felipe Ohm, Sverre Ekrene Escalona Varela, Alejandro Marin Restrepo, Dora Luz Olaussen, Snorre Demchuk, Thomas Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments |
topic_facet |
petroleumsgeologi VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 |
description |
The petroleum generation potential of Upper Jurassic to Lower Cretaceous organic rich shales from the southwestern Barents Sea was evaluated using bulk and quantitative pyrolysis analysis. Fifteen thermally-immature samples from the Hekkingen Formation with differing organic facies, as defined by maceral composition, were subjected to total organic carbon, Rock-Eval pyrolysis, pyrolysis gas chromatography, bulk kinetics, and micro-scale sealed vessel pyrolysis analyses. The results were employed to characterize differences in source rock kerogens, gross petroleum type, and the compositional evolution of the generated fluids as well as their physical properties (i.e. gas to oil ratio, saturation pressure, and formation volume factor) as a function of increasing maturity. The investigated samples contain varying proportions of kerogen type II and III. Heterogeneities in the kerogen composition result in different orders of thermal stability, with the onset of petroleum generation predicted to occur over a high and broad temperature range from 123 °C to 144 °C (at 3.3C⁰/Ma). Reduced kerogen stability associated with elevated sulfur contents is only documented in a few samples. Most of the analyzed samples have the potential to generate low GOR oils of an intermediate to aromatic, low wax paraffinic-naphthenic-aromatic (P–N-A) composition and variable amounts of wet gas. Petroleums of similar compositional and physical properties are predicted to have been generated from the natural maturation sequence of various organic facies in thermally mature areas of the Hammerfest Basin and the Ringvassøy-Loppa High and Bjørnøyrenna fault complexes. Vitrinite-rich sources in the Fingerdjupet Sub-basin and the Troms-Finnmark Fault Complex have potential for gas and condensate generation. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Cedeno Motta, Andres Felipe Ohm, Sverre Ekrene Escalona Varela, Alejandro Marin Restrepo, Dora Luz Olaussen, Snorre Demchuk, Thomas |
author_facet |
Cedeno Motta, Andres Felipe Ohm, Sverre Ekrene Escalona Varela, Alejandro Marin Restrepo, Dora Luz Olaussen, Snorre Demchuk, Thomas |
author_sort |
Cedeno Motta, Andres Felipe |
title |
Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments |
title_short |
Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments |
title_full |
Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments |
title_fullStr |
Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments |
title_full_unstemmed |
Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments |
title_sort |
upper jurassic to lower cretaceous source rocks in the norwegian barents sea, part ii: insights from open- and closed-system pyrolysis experiments |
publisher |
Elsevier Ltd. |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2827310 https://doi.org/10.1016/j.marpetgeo.2021.105343 |
long_lat |
ENVELOPE(17.832,17.832,69.597,69.597) ENVELOPE(22.351,22.351,70.240,70.240) |
geographic |
Barents Sea Hekkingen Loppa |
geographic_facet |
Barents Sea Hekkingen Loppa |
genre |
Barents Sea Berg Finnmark Hammerfest Hammerfest Basin Loppa Finnmark Troms |
genre_facet |
Barents Sea Berg Finnmark Hammerfest Hammerfest Basin Loppa Finnmark Troms |
op_source |
134 Marine and Petroleum Geology |
op_relation |
Cedeño, A., Ohm, S., Escalona, A. et al. (2021) Upper Jurassic to Lower Cretaceous source rocks in the Norwegian Barents Sea, part II: Insights from open- and closed-system pyrolysis experiments. Marine and Petroleum Geology, 134, 105343 urn:issn:0264-8172 https://hdl.handle.net/11250/2827310 https://doi.org/10.1016/j.marpetgeo.2021.105343 cristin:1946363 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2021 |
op_doi |
https://doi.org/10.1016/j.marpetgeo.2021.105343 |
container_title |
Marine and Petroleum Geology |
container_volume |
134 |
container_start_page |
105343 |
_version_ |
1768385029390467072 |