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  Understanding North Sea seismicity for risk mitigation of large-scale CO2 injections

Kühn, D., Martuganova, E., Kettlety, T., Schweitzer, J., Baptie, B., Dahl-Jensen, T., Rane, H., Jerkins, A., Fellgett, M., Hopper, J., Weemstra, C. (2023): Understanding North Sea seismicity for risk mitigation of large-scale CO2 injections, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0566

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016923 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016923_2
Genre: Conference Paper

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 Creators:
Kühn, Daniela1, Author
Martuganova, Evgeniia1, Author
Kettlety, Tom1, Author
Schweitzer, Johannes1, Author
Baptie, Brian1, Author
Dahl-Jensen, Trine1, Author
Rane, Hannah1, Author
Jerkins, Annie1, Author
Fellgett, Mark1, Author
Hopper, John1, Author
Weemstra, Cornelis1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Carbon capture and storage technologies are an essential part of EU’s decarbonisation efforts. Combined with sustainable energy resources, they are necessary to move Europe towards a net zero carbon emissions economy. Containment risk evaluation includes analysing natural seismicity patterns in the North Sea, where several Mt-scale CO2 storage projects are being developed. Within the framework of the ACT project SHARP Storage, an extensive unique earthquake bulletin was compiled using seismicity data from all relevant data centres. The bulletin is stored using the IASPEI Seismic Format (ISF). Preliminary processing included duplicate removal and explosion identification. In total, 15,230 events were recorded between years 1382 and 2022, of which 5,408 were identified as likely or potential explosions. For the remaining events, waveforms are currently being collected as a basis for further analysis, including event relocation and magnitude homogenisation. The magnitude of completeness of this data set varies both spatially and temporally. The most seismically active regions in the study area are the Viking and Central grabens. Coastal areas are populated with more events than the central part of the North Sea due to the denser distribution of seismic stations onshore allowing for the detection of smaller (M<3) magnitude events. Moment tensor inversion, shear-wave splitting measurements, and stress drop analysis will be compared to and complement a review of borehole stress measurements to better gauge the present-day stress field. This is crucial for the understanding of the reservoir and caprock response to large-scale CO2 injection over time.

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-0566
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -