1887

Abstract

Summary

A well-defined geological model of the Gassum Formation in the subsurface of the Skagerrak Strait is established in order to ensure safe storage of CO2. This is particularly important in this open aquifer where the inclined layers slope northwards towards the seafloor. Petrography and provenance analyses are integrated with seismic interpretation and well-log analyses to estimate the reactivity of the sandstones and thereby the CO2 immobilization potential. The results show that the zircon age distributions, the mineralogical compositions and the grain-size parameters are different in the upper and lower part of the Gassum Formation in the J-1 well in the southern part of the study area. The upper part is mineralogically immature and is derived locally from erosion of southernmost Norway, whereas the lower part with smaller grain size, better sorting and lower contents of feldspar and rock fragments has a higher mineralogical maturity and a larger provenance area. The northward onlapping internal seismic reflectors in the formation show that the lower part gradually disappears towards the basin margin, which indicate that injected CO2 will migrate into the most mineralogically immature sediments and these have the highest trapping potential since they are expected to be most reactive.

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/content/papers/10.3997/2214-4609.201801148
2018-06-11
2021-10-21
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References

  1. Folk, R.L.
    [1966] A review of grain-size parameters. Sedimentology, 6, 73–93.
    [Google Scholar]
  2. 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]
  3. Gregersen, U., Baig, I., Sundal, A., Nielsen, L.H., Olivarius, M. and Weibel, R.
    [2018] Seismic interpretation of a sloping offshore potential CO2 aquifer; the Gassum Formation in Skagerrak between Norway and Denmark. Nordic Geological Winter Meeting, Copenhagen (Abstract).
    [Google Scholar]
  4. 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]
  5. Nielsen, L.H. and Japsen, P.
    [1991] Deep wells in Denmark 1935–1990. Lithostratigraphic subdivision. Geological Survey of Denmark Series A, 31, 178 p.
    [Google Scholar]
  6. Olivarius, M. and Nielsen, L.H.
    [2016] Triassic paleogeography of the greater eastern Norwegian-Danish Basin: Constraints from provenance analysis of the Skagerrak Formation. Marine and Petroleum Geology, 69, 168–182.
    [Google Scholar]
  7. Slama, J.
    [2016] Rare late Neoproterozoic detritus in SW Scandinavia as a response to distant tectonic processes. Terra Nova, 28, 394–401.
    [Google Scholar]
  8. Sundal, A., Hellevang, H., Olivarius, M., Miri, R., Nielsen, L.H., Gregersen, U., Andersen, O., Møll-Nilsen, H., Weibel, R. and Aagaard, P.
    [2018] Geological constraints on the immobilization potential for CO2 in the Upper Triassic – Lower Jurassic Gassum Formation (Skagerrak, Norway). Nordic Geological Winter Meeting, Copenhagen (Abstract).
    [Google Scholar]
  9. Thomsen, T.B., Heijboer, T. and Guarnieri, P.
    [2016] jAgeDisplay: software for evaluation of data distributions in U-Th-Pb geochronology. Geological Survey of Denmark and Greenland Bulletin, 35, 103–106.
    [Google Scholar]
  10. Wentworth, C.K.
    [1922] A scale of grade and class terms for clastic sediments. Journal of Geology, 30, 377–392.
    [Google Scholar]
  11. 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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