Modelling of the gas hydrate potential in Svalbard's fjords
Large amounts of methane are trapped as natural gas hydrate (NGH) in the sediments of the Arctic. Unlike NGH provinces offshore west of Svalbard (Vestnesa Ridge), NGH potential in Svalbard’s fjords and near-shore environment is poorly constrained. In this study we modelled the NGH stability zone (GH...
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Online Access: | https://hdl.handle.net/11250/2980616 https://doi.org/10.1016/j.jngse.2021.104127 |
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fthsvestlandet:oai:hvlopen.brage.unit.no:11250/2980616 2024-03-03T08:42:08+00:00 Modelling of the gas hydrate potential in Svalbard's fjords Betlem, Peter Roy, Srikumar Birchall, Thomas Hodson, Andrew Noormets, Riko Römer, Miriam Skogseth, Ragnheid Senger, Kim 2021 application/pdf https://hdl.handle.net/11250/2980616 https://doi.org/10.1016/j.jngse.2021.104127 eng eng Elsevier Norges forskningsråd: 257579 Norges forskningsråd: 228107 Betlem, P., Roy, S., Birchall, T., Hodson, A., Noormets, R., Römer, M., . . . Senger, K. (2021). Modelling of the gas hydrate potential in Svalbard’s fjords. Journal of Natural Gas Science and Engineering, 94:104127. urn:issn:1875-5100 https://hdl.handle.net/11250/2980616 https://doi.org/10.1016/j.jngse.2021.104127 cristin:1925287 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. 94 Journal of Natural Gas Science and Engineering 104127 Peer reviewed Journal article 2021 fthsvestlandet https://doi.org/10.1016/j.jngse.2021.104127 2024-02-02T12:40:48Z Large amounts of methane are trapped as natural gas hydrate (NGH) in the sediments of the Arctic. Unlike NGH provinces offshore west of Svalbard (Vestnesa Ridge), NGH potential in Svalbard’s fjords and near-shore environment is poorly constrained. In this study we modelled the NGH stability zone (GHSZ) to determine the NGH formation potential within the fjords of Svalbard. We applied a nearest neighbour interpolation method to dynamically derive statistical bottom-water temperature (BWT) trends from available CTD data. The BWT trends along with available geothermal gradient data constrained Svalbard-wide sub-bottom thermobaric models suitable for GHSZ modelling in the near subsurface. Analyses of source rock and fluid seepage data in Isfjorden, including 15 newly identified acoustic gas flares, indicate an active petroleum system with fluid migration reaching the seafloor with significant contributions of higher-order hydrocarbons to the gas feed. A GHSZ is predicted for most fjords at mean BWT conditions and 95:5 methane:ethane gas compositions. Suitable conditions for pure methane NGH formation are only met in the deepest parts of Isfjorden, Hinlopenstretet, Kross- and Kongsfjorden, and Rijpfjorden. Temporal constraints implemented along the well-defined Isfjorden transect indicated a notable negative response to water column warming. The predicted GHSZ across Svalbard’s fjords is likely to disappear over the next few decades. publishedVersion Article in Journal/Newspaper Arctic Isfjord* Isfjorden Kongsfjord* Kongsfjorden Rijpfjord* Svalbard Høgskulen på Vestlandet: HVL Open Arctic Svalbard Rijpfjorden ENVELOPE(22.188,22.188,80.165,80.165) Kross ENVELOPE(-21.161,-21.161,63.981,63.981) Hinlopenstretet ENVELOPE(20.728,20.728,79.246,79.246) Journal of Natural Gas Science and Engineering 94 104127 |
institution |
Open Polar |
collection |
Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
description |
Large amounts of methane are trapped as natural gas hydrate (NGH) in the sediments of the Arctic. Unlike NGH provinces offshore west of Svalbard (Vestnesa Ridge), NGH potential in Svalbard’s fjords and near-shore environment is poorly constrained. In this study we modelled the NGH stability zone (GHSZ) to determine the NGH formation potential within the fjords of Svalbard. We applied a nearest neighbour interpolation method to dynamically derive statistical bottom-water temperature (BWT) trends from available CTD data. The BWT trends along with available geothermal gradient data constrained Svalbard-wide sub-bottom thermobaric models suitable for GHSZ modelling in the near subsurface. Analyses of source rock and fluid seepage data in Isfjorden, including 15 newly identified acoustic gas flares, indicate an active petroleum system with fluid migration reaching the seafloor with significant contributions of higher-order hydrocarbons to the gas feed. A GHSZ is predicted for most fjords at mean BWT conditions and 95:5 methane:ethane gas compositions. Suitable conditions for pure methane NGH formation are only met in the deepest parts of Isfjorden, Hinlopenstretet, Kross- and Kongsfjorden, and Rijpfjorden. Temporal constraints implemented along the well-defined Isfjorden transect indicated a notable negative response to water column warming. The predicted GHSZ across Svalbard’s fjords is likely to disappear over the next few decades. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Betlem, Peter Roy, Srikumar Birchall, Thomas Hodson, Andrew Noormets, Riko Römer, Miriam Skogseth, Ragnheid Senger, Kim |
spellingShingle |
Betlem, Peter Roy, Srikumar Birchall, Thomas Hodson, Andrew Noormets, Riko Römer, Miriam Skogseth, Ragnheid Senger, Kim Modelling of the gas hydrate potential in Svalbard's fjords |
author_facet |
Betlem, Peter Roy, Srikumar Birchall, Thomas Hodson, Andrew Noormets, Riko Römer, Miriam Skogseth, Ragnheid Senger, Kim |
author_sort |
Betlem, Peter |
title |
Modelling of the gas hydrate potential in Svalbard's fjords |
title_short |
Modelling of the gas hydrate potential in Svalbard's fjords |
title_full |
Modelling of the gas hydrate potential in Svalbard's fjords |
title_fullStr |
Modelling of the gas hydrate potential in Svalbard's fjords |
title_full_unstemmed |
Modelling of the gas hydrate potential in Svalbard's fjords |
title_sort |
modelling of the gas hydrate potential in svalbard's fjords |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2980616 https://doi.org/10.1016/j.jngse.2021.104127 |
long_lat |
ENVELOPE(22.188,22.188,80.165,80.165) ENVELOPE(-21.161,-21.161,63.981,63.981) ENVELOPE(20.728,20.728,79.246,79.246) |
geographic |
Arctic Svalbard Rijpfjorden Kross Hinlopenstretet |
geographic_facet |
Arctic Svalbard Rijpfjorden Kross Hinlopenstretet |
genre |
Arctic Isfjord* Isfjorden Kongsfjord* Kongsfjorden Rijpfjord* Svalbard |
genre_facet |
Arctic Isfjord* Isfjorden Kongsfjord* Kongsfjorden Rijpfjord* Svalbard |
op_source |
94 Journal of Natural Gas Science and Engineering 104127 |
op_relation |
Norges forskningsråd: 257579 Norges forskningsråd: 228107 Betlem, P., Roy, S., Birchall, T., Hodson, A., Noormets, R., Römer, M., . . . Senger, K. (2021). Modelling of the gas hydrate potential in Svalbard’s fjords. Journal of Natural Gas Science and Engineering, 94:104127. urn:issn:1875-5100 https://hdl.handle.net/11250/2980616 https://doi.org/10.1016/j.jngse.2021.104127 cristin:1925287 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. |
op_doi |
https://doi.org/10.1016/j.jngse.2021.104127 |
container_title |
Journal of Natural Gas Science and Engineering |
container_volume |
94 |
container_start_page |
104127 |
_version_ |
1792497618419449856 |