1887

Abstract

Summary

Low-enthalpy geothermal energy is exploited from deep sandstones in Copenhagen in eastern Denmark, and the possibility of exploit the shallower sandstones of the Gassum Formation and the Karlebo Member is considered here. Petrography, porosity, permeability and provenance data from core and cutting samples on Zealand are compared in order to investigate the sediment composition and the reservoir properties across the area. Sandstones from central Zealand are on average coarser grained and better sorted than sandstones from the Copenhagen area, and this trend is found both within the Gassum Formation and the Karlebo Member. The sandstones from these units have a comparable and very mature mineralogy where quartz is the dominant component. Zircon age dating reveals that this is most likely caused by reworking of older sediments from the Ringkøbing–Fyn High. Good reservoir quality is presumably present in the vast majority of the sandstones in the Copenhagen area. Differences in maximum burial depth and associated diagenesis must be taken into account when estimating the reservoir properties of sandstones in the Copenhagen area. The high mineralogical maturity documents that these sandstone reservoirs would be optimal for geothermal exploitation since the water will be reinjected into almost inert sandstones.

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/content/papers/10.3997/2214-4609.201702125
2017-09-03
2024-03-28
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References

  1. American Petroleum Institute
    American Petroleum Institute [1998] API RP 40. Recommended practices for core analysis. Second edition. American Petroleum Institute, Washington DC.
    [Google Scholar]
  2. Folk, R.L
    . [1966] A review of grain-size parameters. Sedimentology, 6, 73–93.
    [Google Scholar]
  3. Frei, D. and Gerdes, A.
    [2009] Precise and accurate in situ U-Pb dating of zircon with high sample throughput by automated LA-SF-ICP-MS. Chemical Geology, 261, 261–270.
    [Google Scholar]
  4. Holmslykke, H.D., Kjøller, C. and Fabricius, I.L.
    [submitted] Geochemical and reactive transport modelling of injection of heated formation water into the Gassum Formation. Submitted to Earth and Space Chemistry.
    [Google Scholar]
  5. Japsen, P. and 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.
    [Google Scholar]
  6. Japsen, P., Green, P.F., Nielsen, L.H., Rasmussen, E.S. and 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.
    [Google Scholar]
  7. Milliken, K.L., McBride, E.F and Land, L.S.
    [1989] Numerical assessment of dissolution versus replacement in the subsurface destruction of detrital feldspars, Oligecene Frio Formation, South Texas. Journal of Sedimentary Petrology, 59, 740–757.
    [Google Scholar]
  8. Nielsen, L.H.
    [2003] Late Triassic - Jurassic development of the Danish Basin and the Fennoscandian Border Zone, southern Scandinavia. Geological Survey of Denmark and Greenland Bulletin, 1, 459–526.
    [Google Scholar]
  9. Olivarius, M., Weibel, R., Friis, H., Boldreel, L.O., Keulen, N. and Thomsen, T.B.
    [2017] Provenance of the Lower Triassic Bunter Sandstone Formation: implications for distribution and architecture of aeolian vs. fluvial reservoirs in the North German Basin. Basin Research, 29, Suppl. 1, 113–130.
    [Google Scholar]
  10. Springer, N.
    [2003] Margretheholm-2 (MAH-2). Sidewall core analysis data. GEUS report file, no. 27980, 2 pp.
    [Google Scholar]
  11. Wentworth, C.K.
    [1922] A scale of grade and class terms for clastic sediments. Journal of Geology, 30, 377–392.
    [Google Scholar]
  12. Weibel, R., Olivarius, M., Kristensen, L., Friis, H., Hjuler, M.L., Kjøller, C., Mathiesen, A. and Nielsen, L.H.
    [2017] 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.
    [Google Scholar]
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