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In June 2021, a novel Danish national carbon capture and storage strategy was ratified by the Danish Parliament, and this was followed by the initiation of the project ‘CCS2022–2024’, led by the Geological Survey of Denmark and Greenland. In collaboration with other institutions, we acquired and interpreted new 2D seismic data between 2022 to 2024 to investigate and mature eight sites for potential subsurface storage of CO2 in Danish onshore and offshore areas. This Bulletin contains a series of papers that present important results of the work. In this introduction paper, we provide an overview of seismic acquisitions and the interpretation of seismic data together with existing deep wells. The study sites selected are large subsurface structures located in onshore Jylland, Sjælland and Lolland and offshore Denmark in the eastern North Sea. The onshore targets are the Gassum, Havnsø, Rødby, Stenlille and Thorning structures, while the offshore sites comprise the Inez, Jammerbugt and Lisa structures. The project work comprises a series of reports regarding extensive seismic acquisition, processing and interpretation of the new and pre-existing seismic data as well as other publications emanating from the project. This Bulletin and the technical reports present an improved understanding of the formation, composition and geometry of the investigated structures. The studies include the mapping of the reservoir and seal formations, identification of principal faults, interpretation of the stratigraphic and structural development, reservoir and seal characterisation and estimates of the static storage capacity. Hence, this research provides a significant step forward concerning characterisation of the geology and maturation of the potential storage sites. In addition, it has inspired new ideas, including an updated regional stratigraphic interpretation of the Triassic succession of the Danish Basin and correlation with adjacent basins.
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Copyright (c) 2025 Ulrik Gregersen, Michael B W Fyhn, Marie Keiding, Tanni Abramovitz, Morten Bjerager, Henrik Vosgerau, Florian W H Smit, Thomas Funck, Anders Mathiesen, Finn Mørk, Niels H Schovsbo, Henrik I Petersen, Lars Henrik Nielsen, Karen Dybkjær, Bodil W Lauridsen, Emma Sheldon, Maiken L Olsen, Gunver K Pedersen, Carsten M Nielsen, Erik S Rasmussen, Alireza Malehmir, Myrto Papadopoulou, Samuel Zappalá , Magdalena Markovic, Michael Westgate, Jolanta Putnaite, Emmanouil Konstantinidis, Kristina Kucinskaite, Axel Erhardt, Egon Nørmark

This work is licensed under a Creative Commons Attribution 4.0 International License.
Data Availability Statement
Funding
The funding to GEUS for the maturation of the eight selected, potential CO2 storage sites in Denmark (the CCS2022‒2024 project) is provided by the ‘Funding of Higher Education in Denmark’ (Forskningsreserven 2022). The funding made the contracted seismic acquisition and the subsequent work including this publication possible.Downloads
Issue edited by Jon R. Ineson (GEUS).
This special issue of GEUS Bulletin contains a series of papers that present results of the "CCS2022–2024" project, led by the Geological Survey of Denmark and Greenland (GEUS). The project has acquired and interpreted new 2D seismic data between 2022 to 2024 to investigate [...]
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