Assessment of subsurface pressure regimes onshore Denmark derived from formation-water salinity and artesian flow

Niels Hemmingsen Schovsbo; Hanne Holmslykke; Anders Mathiesen; Niels Springer; Carsten Nielsen

doi:10.34194/73vyqt24

Conceptual sketch of supercritical carbon dioxide (scCO2 ) stored in a fault-bounded salt structure in brown and blue layers

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Abstract

This study presents a first-order assessment of reservoir pressure regimes across onshore Denmark, focusing on hydrostatic conditions and occurrences of natural overpressure. Using a newly compiled database of brine salinity measurements from 28 wells, hydrostatic pressures were estimated based on salinity-derived density profiles. Validation against in situ pressure measurements confirms the reliability of this approach. Additional analysis of historical artesian deep wells documents local overpressured reservoirs within specific units such as the Zechstein Group, Bunter Sandstone and Ørslev Formations. These overpressured compartments suggest that reservoirs may be hydraulically isolated, potentially impacting storage capacity in CO₂ sequestration projects. Overpressure is also observed in the overburden within the Chalk Group. We suggest that regional Neogene uplift has further shaped hydraulic heads in the Chalk Group, introducing semi-regional pressure compartments.

The main objective of this study was to establish a robust regional baseline for hydrostatic pressure conditions while highlighting historically underappreciated overpressure phenomena relevant to risk assessment in subsurface CO₂ storage, geothermal utilisation and underground energy storage. We calculate the pressure required to lift brine to the surface, potentially allowing interaction with groundwater and thereby providing practical constraints for risk assessments and subsurface pressure management in prospective CO₂ storage sites. In order to distinguish between open versus closed aquifer behaviour and identify potential brine discharge pathways, the sealing capacity of the Quaternary cover above the sparse natural outcrops of the Gassum and Skagerrak Formations, together with the conductivity of fault systems, must be assessed. These results establish a pressure baseline and provide critical input for future pressure communication models, supporting site selection, operational safety and coordinated subsurface resource management during Denmark’s green energy transition.

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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One Excel spreadsheet containing Supplementary Table S1 (Pressure estimates) is available at https://doi.org/10.22008/FK2/FCO82C.

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This study is part of the GEUS subsurface pressure study funded by Denmark's research reserve (Forskningsreserven 2025).

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Bachu, S. 2015: Review of CO2 storage efficiency in deep saline aquifers. International Journal of Greenhouse Gas Control 40, 188–202. https://doi.org/10.1016/j.ijggc.2015.01.007
Baig, I. et al. 2013: Potential Triassic and Jurassic CO2 storage reservoirs in the Skagerrak-Kattegat Area. Energy Procedia 37, 5298–5306. https://doi.org/10.1016/j.egypro.2013.06.447
Bertelsen, F. 1980: Lithostratigraphy and depositional history of the Danish Triassic. Danmarks Geologiske Undersøgelse, Serie B 4, 1–59. https://doi.org/10.34194/serieb.v4.7059
Birkholzer, J.T. et al. 2009: Large-scale impact of CO2 storage in deep saline aquifers: A sensitivity study on the pressure response in stratified systems. International Journal of Greenhouse Gas Control 3, 181–194. https://doi.org/10.1016/j.ijggc.2008.08.002
Birkholzer, J.T. & Zhou, Q. 2009: Basin-scale hydrogeologic impacts of CO2 storage: Capacity and regulatory implications. International Journal of Greenhouse Gas Control 6, 745–756. https://doi.org/10.1016/j.ijggc.2009.07.002
Bonnesen, E.P., Larsen, F., Sonnenborg, T.O., Klitten, K. & Stemmerik, L. 2009: Deep saltwater in Chalk of North-West Europe: Origin, interface characteristics and development over geological time. Hydrogeology Journal 17, 1643–1663. https://doi.org/10.1007/s10040-009-0456-9
Bredesen, K., Smit, F., Lorentzen, M. & Gregersen, U. 2023: Improved delineation of the Gassum Formation reservoir zones using seismic impedance inversions: Implications for exploiting the Stenlille aquifer gas storage facility as a CO2 storage demonstration site, onshore Denmark. Geoenergy 1, 1–12. https://doi.org/10.1144/geoenergy2022-002
Bump, A.P. & Hovorka, S.D. 2024: Pressure space: The key subsurface commodity for CCS. International Journal of Greenhouse Gas Control 136, 104174. https://doi.org/10.1016/j.ijggc.2024.104174
Chadwick, R.A., Arts, R., Bernstone, C., May, F., Thibeau, S. & Zweigel, P. 2008: Best practice for the storage of CO2 in saline aquifers. British Geological Survey Occasional Publication 14, 1–277.
Cihan, A., Birkholzer, J.T. & Zhou, Q. 2013: Pressure buildup and brine migration during CO2 storage in multilayered aquifers. Ground Water 51(2), 252–267. https://doi.org/10.1111/j.1745-6584.2012.00972.x
Danish American Prospecting. 1951: Gassum-1 completion report. GEUS Report File 4518, 1–344.
Danish American Prospecting. 1952: Tønder-1 completion report. GEUS Report File 10120, 1–391.
Danish American Prospecting. 1953: Tønder-2 completion report. GEUS Report File 10351, 1–293.
Danish American Prospecting. 1958a: Hønning-1 completion report. GEUS Report File 8327, 1–58.
Danish American Prospecting. 1958b: Grindsted-1 completion report. GEUS Report File 7867, 1–41.
Dansk Boreselskab. 1981a: Løgumkloster-1 completion report. GEUS Report File 7282, 1–110.
Dansk Boreselskab. 1981b: Tønder-3 completion report. GEUS Report File 9713, 1–81.
Dansk Naturgas. 1989: Stenlille gas storage field cap-rock evaluation. GEUS Report File 43043, 1–77.
Dansk Olie og Naturgas. 1982: Thisted-2, well summary (completion report). GEUS Report File 9617, 1–149.
Dansk Olie og Naturgas. 1983: Tønder-5 well summary (gas storage exploration well) report. GEUS Report File 10408, 1–88.
Dennis, H., Bergmo, P. & Holt, T. 2005: Tilted oil–water contacts: Modelling the effects of aquifer heterogeneity. In: Doré, A.G. & Vining, B.A. (eds): Petroleum geology: North-West Europe and global perspectives. Proceedings of the 6th Petroleum Geology Conference, The Geological Society, London, 145–158. https://doi.org/10.1144/0060145
Di Remigio, G., Rocchi, I. & Zania, V. 2019: Swelling properties of a Danish Paleogene clay: A multiscale study on structure. In: 7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019). E3S Web of Conferences 92, 01008, 1–6. https://doi.org/10.1051/e3sconf/20199201008
Dinesen, B. 1961: Salt mineralvand fra Danmarks dybere undergrund. Danmarks Geologiske Undersøgelse, Serie 4(6), 7006. https://doi.org/10.34194/raekke4.v4.7006
Dong E&P. 2001: Stenlille-19 final well report. GEUS Report File 28667, 1–189.
Dong E&P. 2003: Margretheholm-1 and Margretheholm-1A final well report. GEUS Report File 19622, 1–271.
Dong Energy. 2010: Sønderborg-2 final well report. GEUS Report File 28663, 1–211.
Dutta, N.C., Bachrach, R. & Mukerji, T. 2021: Quantitative analysis of geopressure for geoscientists and engineers. Cambridge University Press, Cambridge. https://doi.org/10.1017/9781108151726
Erlström, M., Boldreel, L.O., Lindström, S., Kristensen, L., Mathiesen, A., Andersen, M.S., Kamla, E. & Nielsen, L.H. 2018: Stratigraphy and geothermal assessment of Mesozoic sandstone reservoirs in the Øresund Basin – exemplified by well data and seismic profiles. Geological Society of Denmark 66, 123–149. https://doi.org/10.37570/bgsd-2018-66-06
Fisher, R.A. & Yates, F. 1963: Statistical tables for biological, agricultural and medical research, 6th edition, 146 pp. Oliver & Boyd, London. https://doi.org/10.1002/bimj.19650070219
Frykman, P. 2001: Spatial variability in petrophysical properties in upper Maastrichtian chalk outcrops at Stevns Klint, Denmark. Marine Petroleum Geology 18(10), 1041–1062. https://doi.org/10.1016/S0264-8172(01)00043-5
Gregersen, U. et al. 2025: Seismic investigations of eight geological structures for potential storage of CO2 in Denmark: An introduction. GEUS Bulletin 60, 8415. https://doi.org/10.34194/299dt488
Halland, E.K. et al. (eds). 2012: CO2 storage atlas – Norwegian North Sea. https://www.sodir.no/490a7e/globalassets/1-sodir/publikasjoner/atlas-eng/co2-atlas-north-sea.pdf (accessed 15 July 2025).
Heilmann-Clausen, C., Nielsen, O.B. & Gersner, F. 1985: Lithostratigraphy and depositional environments in the upper Paleocene and Eocene of Denmark. Bulletin of the Geological Society of Denmark 33, 287–323. https://doi.org/10.37570/bgsd-1984-33-26
Henriksen, H.J., Nilsson, B., Ditlefsen, C., Troldborg, L. & Thorling, L. 2023: Groundwater level monitoring of Danish chalk and limestone aquifers to survey trends in quantitative status and groundwater resources. Geological Society, London, Special Publications 517, 183–201. https://doi.org/10.1144/SP517-2022-5
Hjelm, L., Anthonsen, K.A., Dideriksen, K., Nielsen, C.M., Nielsen, L.H. & Mathiesen, A. 2022: Capture, storage and use of CO2 (CCUS). Evaluation of the CO2 storage potential in Denmark. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2020/46, 1–143. https://doi.org/10.22008/gpub/34543
Hjuler, M.L., Olivarius, M., Boldreel, L.O., Kristensen, L., Laier, T., Mathiesen, A., Nielsen, C.M. & Nielsen, L.H. 2019: Multidisciplinary approach to assess geothermal potential, Tønder area, North German Basin. Geothermics 78, 211–223. https://doi.org/10.1016/j.geothermics.2018.12.001
Hjuler, M.L., Sparre Andersen, M., Møller Nielsen, C., Mathiesen, A., Kristensen, L., Skaarup, N. & Nielsen, L.H. 2018: Potential for brine storage near the gas storage facility at Lille Torup, northern Jylland, Denmark. GEUS Bulletin 41, 13–16. https://doi.org/10.34194/geusb.v41.4331
Holmslykke, H.D., Schovsbo, N.H., Kristensen, L., Weibel, R. & Nielsen, L.H. 2019: Characterising brines in deep Mesozoic sandstone reservoirs, Denmark. Geological Survey of Denmark and Greenland Bulletin 43, e2019430104, 1–5. https://doi.org/10.34194/GEUSB-201943-01-04
Holmslykke, H.D., Weibel, R., Olsen, D. & Anthonsen, K.L. 2023: Geochemical reactions upon injection of heated formation water in a Danish geothermal reservoir. ACS Earth and Space Chemistry 7(9), 1635–1647. https://doi.org/10.1021/acsearthspacechem.2c00285
IPCC. 2023: Climate change 2023: Synthesis report. Contribution of Working Groups I, II and III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Core Writing Team, Lee, H. & Romero, J. (eds), 184 pp. IPCC, Geneva. http://dx.doi.org/10.59327/IPCC/AR6-9789291691647
Jacobsen, F.L., Sønderholm, M., Springer, N., Larsen, J.G., Lagoni, P. & Fabricius, J. 1984: Zechstein Salt Denmark. Salt Research Project EFP-81. Volume I: Sammendrag af Saltforskningsprojekt EFP-81 (English Summary). Danmarks Geologiske Undersøgelse Serie C 1, 1–87, DGU, København. https://doi.org/10.34194/seriec.v1.7092
Jakobsen, P.R., Frykman, P. & Jakobsen, R. 2022: Studies of geological properties and conditions for deep disposal of radioactive waste, Denmark. Phase 1, Report no. 3. Upper Cretaceous chalk and Paleocene limestone distribution and properties. GEUS. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2021/54. https://doi.org/10.22008/gpub/34614
Japsen, P. 1998: Regional velocity-depth anomalies, North Sea chalk: A record of overpressure and Neogene uplift and erosion. AAPG Bulletin 82, 2031–2074. https://doi.org/10.1306/00aa7bda-1730-11d7-8645000102c1865d
Japsen, P. & Bidstrup, T. 1999: Quantification of late Cenozoic erosion in Denmark based on sonic data and basin modelling. Bulletin of the Geological Society of Denmark 46, 79–99. https://doi.org/10.37570/bgsd-1999-46-08
Japsen, P., Green, P.F., Chalmers, J.A. & Bonow, J. 2018: Mountains of southernmost Norway: Uplifted Miocene peneplains and re-exposed Mesozoic surfaces. Journal of the Geological Society 175, 721–741. https://doi.org/10.1144/jgs2017-157
Japsen, P., Green, P.F., Nielsen, L.H., Rasmussen, E.S. & Bidstrup, T. 2007: Mesozoic–Cenozoic exhumation events in the eastern North Sea Basin: A multi-disciplinary study based on palaeothermal, palaeoburial, stratigraphic and seismic data. Basin Research 19, 451–490. https://doi.org/10.1111/j.1365-2117.2007.00329.x
Knudsen, C., Schovsbo, N.H. & Mathiesen, A. 2010: Pumping power. Rock quality of chalk in the Stevns 1 drill core and possibilities of finding higher strength chalk at depth: Evidence from Hobro-1 and Stenlille-6 sonic logs. Rock quality of chalk in Stevns 1, Hobro-1 and Stenlille-6. GEUS. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2010/45, GEUS, København. https://doi.org/10.22008/gpub/28349
Kristensen, L., Hjuler, M.L., Frykman, P., Olivarius, M., Weibel, R., Nielsen, L.H. & Mathiesen, A. 2016: Pre-drilling assessments of average porosity and permeability in the geothermal reservoirs of the Danish area. Geothermal Energy 4, 6. https://doi.org/10.1186/s40517-016-0048-6
Labaune, F. & Knudsen, J.E. 1987: Inert gas in Tønder aquifer storage: A complete preliminary computer study, Society of Petroleum Engineers, Dallas, Texas. SPE-16863-MS. https://doi.org/10.2118/16863-MS
Laier, T. 1989: Mapping of low enthalpy brines in Denmark for geothermal exploitation. In: Miles, D.L. (ed.): Proceedings of the 6th International Symposium on Water-Rock Interaction, Malvern, 3–8 August, 1989, 409–412.
Laier, T. 2008: Chemistry of Danish saline formation waters relevant for core fluid experiments. Fluid chemistry data for lab experiments related to CO2 storage in deep aquifers. Danmarks og Grønlands Geologiske Undersøgelser Rapport 2008/48, 10 pp. https://doi.org/10.22008/gpub/27171
Larsen, M., Bidstrup, T. & Dalhoff, F. 2003: Mapping of deep saline aquifers in Denmark with potential for future CO2 storage. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2003/39, 83 pp. https://doi.org/10.22008/gpub/19006
Mbia, E.N., Fabricius, I.L., Krogsbøll, A., Frykman, P. & Dalhoff, F. 2014: Permeability, compressibility and porosity of Jurassic shale from the Norwegian–Danish Basin. Petroleum Geoscience 20(3), 257–281. https://doi.org/10.1144/petgeo2013-035
Michelsen, O., Nielsen, L.H., Johannessen, P.N., Andsbjerg, J. & Surlyk, F. 2003: Jurassic lithostratigraphy and stratigraphic development onshore and offshore Denmark. GEUS Bulletin 1, 145–216. https://doi.org/10.34194/geusb.v1.4651
Midtgaard, H.H., Hjelm, L., Jakobsen, R., Karan, S., Kjøller, C., Nilsson, B. & Poulsen, M.L.K. 2022: Studies of geological properties and conditions for deep disposal of radioactive waste, Denmark Phase 1, report no. 10. Characterization and evaluation of geological properties and conditions at 500 meters depth. English version of report: 2021/60. GEUS. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2021/61, GEUS, København. https://doi.org/10.22008/gpub/34621
Mogensen, T.E. & Korstgård, J.A. 2003: Triassic and Jurassic transtension along part of the Sorgenfrei–Tornquist Zone in the Danish Kattegat. Geological Survey of Denmark and Greenland Bulletin 1, 437–458. https://doi.org/10.34194/geusb.v1.4680
Mukhtar, M.H., Hatzignatiou, D.G. & Ehlig-Economides, C. 2024: Extended aquifer system pressure behavior under carbon storage. SPE Journal 29(9), 5101–5119. https://doi.org/10.2118/214868-PA
Nielsen, C.M., Grimstad, A.A., Drysdale, R. & Williams, J.D.O. 2017: Pressure control for managing and optimizing adjacent subsurface operations in large scale CCS. Energy Procedia 114, 4787–4796. https://doi.org/10.1016/j.egypro.2017.03.1618
Nielsen, L.H. 2003: Late Triassic–Jurassic development of the Danish Basin and Fennoscandian Border Zone, Southern Scandinavia. Geological Survey of Denmark and Greenland Bulletin 1, 459–526. https://doi.org/10.34194/geusb.v1.4681
Nielsen, O.B., Rasmussen, E.S. & Thyberg, B.I. 2015: Distribution of clay minerals in the northern North Sea Basin during the Paleogene and Neogene: A result of source-area geology and sorting processes. Journal of Sedimentary Research 85, 562–581. https://doi.org/10.2110/jsr.2015.40
Nihous, G.C. 2016: Notes on hydrostatic pressure. Journal of Ocean Engineering and Marine Energy 2, 105–109. https://doi.org/10.1007/s40722-015-0035-1
Oldenburg, C.M. & Rinaldi, A.P. 2011: Buoyancy effects on upward brine displacement caused by CO2 Injection. Transport in Porous Media 87, 525–540. https://doi.org/10.1007/s11242-010-9699-0
Olivarius, M., Sundal, A., Weibel, R., Gregersen, U., Baig, I., Thomsen, T.B., Kristensen, L., Hellevang, H. & Nielsen, L.H. 2019: Provenance and sediment maturity as controls on CO2 mineral sequestration potential of the Gassum Formation in the Skagerrak. Frontiers in Earth Science 7, 321. https://doi.org/10.3389/feart.2019.00312
Olivarius, M., Weibel, R., Friis, H., Boldreel, L.O., Keulen, N. & Thomsen, T.B. 2017: Provenance of the lower Triassic Bunter Sandstone Formation: Implications for distribution and architecture of an eolian vs. fluvial reservoirs in the North German Basin. Basin Research 29(S1), 113–130. https://doi.org/10.1111/bre.12140
Orozova-Bekkevold, I., Rasmussen, E.S. & Schovsbo, N.H. 2023: Influence of post-Danian sea-level changes and variations in sedimentation rate on overpressure build up in the clay-rich overburden in the Danish sector of the North Sea Central Graben. Journal of Petroleum Geology 46, 191–217. https://doi.org/10.1111/jpg.12835
Parkhurst, D.L. & Appelo, C.A.J. 2013: Description of input and examples for PHREEQC version 3 – A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations. U.S. Geological Survey Techniques and Methods 6(A43), 1–497. https://doi.org/10.3133/tm6A43
Pasquinelli, L., Felder, M., Gulbrandsen, M.L., Hansen, T.M., Jeon, J.-S., Molenaar, N., Mosegaard, K. & Fabricius, I.L. 2020: The feasibility of high-temperature aquifer thermal energy storage in Denmark: The Gassum Formation in the Stenlille structure. Bulletin of the Geological Society of Denmark 68, 133–154. https://doi.org/10.37570/bgsd-2020-68-06_rev
Pedersen, A.B., Schovsbo, N.H., Bodin, S., Rudra, A., Egholm, A.E., Clausen, O.R., Tegner, C. & Sanei, H. 2025: Geochemical characterisation of the Danish subsurface ash series for carbon mineralisation potential. Bulletin of the Geological Society of Denmark 74, 227–250. https://doi.org/10.37570/bgsd-2025-74-13
Peryt, T.M., Geluk, M.C., Mathiesen, A., Paul, J. & Smith, K. 2010: Zechstein. In: Doornenbal, J.C. & Stevenson, A.G. (eds): Petroleum geological atlas of the Southern Permian Basin area, 123–147. European Association of Geoscientists and Engineers, Houten.
Petersen, H.I., Nielsen, L.H., Bojesen-Koefoed, J.A., Mathiesen, A., Kristensen, L. & Dalhoff, F. 2008: Evaluation of the quality, thermal maturity and distribution of potential source rocks in the Danish part of the Norwegian–Danish Basin. Geological Survey of Denmark and Greenland Bulletin 16, 1–66. https://doi.org/10.34194/geusb.v16.4989
Putnaite, J., Malehmir, A., Bjerager, M., Abramovitz, T., Vosgerau, H. & Keiding, M. 2025: The role of a salt pillow in deep saline aquifer integrity and shallow groundwater resources. Scientific Report 15, 15074. https://doi.org/10.1038/s41598-025-99721-2
Rasmussen, E.S., Dybkjær, K. & Piasecki, S. 2010: Lithostratigraphy of the Upper Oligocene – Miocene succession of Denmark. GEUS Bulletin 22, 1–92. https://doi.org/10.34194/geusb.v22.4733
Rasmussen, E.S., Vangkilde-Pedersen, T. & Scharling, P. 2007: Prediction of reservoir sand in Miocene deltaic deposits in Denmark based on high-resolution seismic data. Geological Survey of Denmark and Greenland Bulletin 13, 17–20. https://doi.org/10.34194/geusb.v13.4966
Ringrose, P. 2020: How to store CO2 underground: Insights from early-mover CCS projects. 129 pp. SpringerBriefs in Earth Sciences, Cham, Switzerland. https://doi.org/10.1007/978-3-030-33113-9
Rocchi, I., Di Remigio, G., Grønbech, G.L. & Zania, V. 2018: Compressibility and swelling of an overconsolidated highly plastic Paleogene clay. In: Giovine, P. et al. (eds): Micro to MACRO mathematical modelling in soil mechanics, 109–117. Springer Nature, Birkhäuser, Cham. https://doi.org/10.1007/978-3-319-99474-1_11
Sandersen, P.B.E. & Jørgensen, F. 2015: Neotectonic deformation of a Late Weichselian outwash plain. Boreas 44, 413–431. https://doi.org/10.1111/bor.12103
Sandersen, P.B.E. & Jørgensen, F. 2022: Tectonic impact on Pleistocene and Holocene erosional patterns in a formerly glaciated intra-plate area. Quaternary Science Reviews 293, 107681, 1–21. https://doi.org/10.1016/j.quascirev.2022.107681
Schiøler, P. et al. 2007: Lithostratigraphy of the Palaeogene–Lower Neogene succession of the Danish North Sea. Geological Survey of Denmark and Greenland Bulletin 12, 1–77. https://doi.org/10.34194/geusb.v12.5249
Schovsbo, N.H., Holmslykke, H.D., Mathiesen, A. & Nielsen, C.M. 2025: Assessment of formation brine salinity, pressure and temperature in selected structures in eastern Denmark and implications for CO2 storage. GEUS Bulletin 60, 8383. https://doi.org/10.34194/62417j08
Schovsbo, N.H. & Jakobsen, F. 2019: Review of hydrocarbon potential in East Denmark following 30 years of exploration activities. Geological Survey of Denmark and Greenland Bulletin 43, e2019430105, 1–6. https://doi.org/10.34194/GEUSB-201943-01-05
Schovsbo, N.H., Ponsaing, L., Mathiesen, A., Bojesen-Koefoed, J.A., Kristensen, L., Dybkjær, K., Johannesen, P. & Jakobsen, F. 2020: Regional hydrocarbon potential and thermal reconstruction of the Lower Jurassic to lowermost Cretaceous source rocks in the Danish Central Graben. Bulletin of the Geological Society of Denmark 68, 195–230. https://doi.org/10.37570/bgsd-2020-68-09
Sigmond, E.M.O. 2002: Geological map, land and sea areas of Northern Europe. Scale 1:4 million. Geological Survey of Norway. https://static.ngu.no/filearchive/91/faktaark_north_europe_map.pdf (accessed 23 September 2025).
Springer, N., Dideriksen, K., Holmslykke, H.D., Kjøller, C., Olivarius, M. & Schovsbo, N. 2020: Capture, storage and use of CO2 (CCUS): Seal capacity and geochemical modelling. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2020/30, 42 pp, GEUS, København. https://doi.org/10.22008/gpub/34527
Springer, N., Lorentzen, xH.J., Fries, K. & Lindgreen, H.B. 2010: Caprock seal capacity evaluation of the Fjerritslev and Børglum formations. Contribution to the EFP-project AQUA-DK. Danmarks og Grønlands Geologiske Undersøgelse Rapport 2010/112, 52 pp, GEUS, København. https://doi.org/10.22008/gpub/28418
Swarbrick, R.E. & Osborne, M.J. 1998: Mechanisms that generates abnormal pressures: An overview. In: Law, B.E. et al. (eds): Abnormal pressures in hydrocarbon environments. AAPG Memoirs 70, 13−34. https://doi.org/10.1306/M70615C2
Thibeau, S. & Mucha, V. 2011: Have we overestimated saline aquifer CO2 storage capacities? Oil & Gas Science and Technology–Rev. IFP Energies Nouvelles 66(1), 81−92. https://doi.org/10.2516/ogst/2011004
Vangkilde-Pedersen, T., Mielby, S., Jakobsen, P.R., Hansen, B., Iversen, C.H. & Nielsen, A.M. 2011: Kortlægning af kalkmagasiner. Geo-vejledning 8. GEUS Særudgivelse, København. https://doi.org/10.22008/gpub/29069
Vejbæk, O.V. 1997: Dybe strukturer i danske sedimentære bassiner. Geologisk Tidsskrift 4, 1–31. https://2dgf.dk/xpdf/gt1997-4-1-31.pdf (accessed 23 September 2025).
Vejbæk, O.V. 2008: Disequilibrium compaction as the cause for Cretaceous–Paleogene overpressures in the Danish North Sea. AAPG Bulletin 92, 165−180. https://doi.org/10.1306/10170706148
Vosgerau, H. et al. 2016: A WebGIS portal for exploration of deep geothermal energy based on geological and geophysical data. Geological Survey of Denmark and Greenland Bulletin 35, 23–26. https://doi.org/10.34194/geusb.v35.4633
Weibel, R., Kjøller, C., Bateman, K., Laier, T., Nielsen, L.H. & Purser, G. 2014: Carbonate dissolution in Mesozoic sand- and claystones as a response to CO2 exposure at 70oC and 20 MPa. Applied Geochemistry 42, 1–15. https://doi.org/10.1016/j.apgeochem.2013.12.006
Weibel, R. et al. 2017a: The influence of climate on early and burial diagenesis of Triassic and Jurassic sandstones from the Norwegian–Danish Basin. The Depositional Record 3, 60–91. https://doi.org/10.1002/dep2.27
Weibel, R., Olivarius, M., Kristensen, L., Friis, H., Hjuler, M.L., Kjøller, C., Mathiesen, A. & Nielsen, L.H. 2017b: Predicting permeability of low-enthalpy geothermal reservoirs: A case study from the Upper Triassic–Lower Jurassic Gassum Formation, Norwegian–Danish Basin. Geothermics 65, 135–157. https://doi.org/10.1016/j.geothermics.2016.09.003
Williams, J. et al. 2022: Report on initial assessments of rock-failure risks for case studies. Delivery 4.1 SHARP Storage Project no. 327342, 78 pp. https://hdl.handle.net/11250/3171125 (accessed 17 May 2026).
Zhou, Q., Birkholzer, J.T., Tsang, C.-F. & Rutqvist, J. 2008: A method for quick assessment of CO2 storage capacity in closed and semi-closed saline formations. International Journal of Greenhouse Gas Control 2(4), 626–639. https://doi.org/10.1016/j.ijggc.2008.02.004
Ziegler, P.A. 1990: Geological atlas of western and central Europe. 2nd edition, 239 pp. Shell Internationale Petroleum Maatschappij B.V. Distributed by Geological Society Publishing House, London.

Assessment of subsurface pressure regimes onshore Denmark derived from formation-water salinity and artesian flow

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Assessment of subsurface pressure regimes onshore Denmark derived from formation-water salinity and artesian flow

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Abstract

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Data Availability Statement

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