Kortlægning af potentielle geotermiske reservoirer i Danmark

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Abstract
The present report comprises primary data and analyses of potential geothermal reservoirs in Denmark. All available well data and seismic data from the Danish onshore area are included. Based on core material and petrophysical measurements, the following formations are described: Cambrian quartsitic sandstone, Carboniferous limestone, Rotliegendes sandstone, Zechstein carbonates, Bunter Sandstone Formation (Triassic), Ørslev Formation (Triassic), Falster Formation (Triassic), Tønder Formation (Triassic), Gassum Formation (Triassic-L. Jurassic), Haldager Sand (M. Jurassic), and Frederikshavn Member (U. Jurassic-L. Cretaceous). Generalized depth maps have been constructed for Near top Bunter Sandstones Formation, Near top Triassic, Base Haldager Sand, and Base Upper Cretaceous Limstone, from seismic two-way time maps of the relevant horizons. lsotherm maps of the corresponding horizons, based on measured values (BHT) and new, calculated model values, are presented. The reservoir parameters - porosity, permeability, net sand, and depth - have been analysed and evaluated from core material and petrophysical measurements. These data are presented in isopach maps of each formation, and in tables. The regional distribution of potential reservoirs in the depth interval 2000-3000 m is described, and the geothermal reserves are evaluated, with regard to energy.

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