Evaluation of possible geothermal reservoirs in the Helsingør area. Contribution to an evaluation of the geothermal potential

Morten Leth Hjuler, Lars Kristensen, Anders Mathiesen, Torben Bidstrup, Lars Henrik Nielsen

Research output: Book/ReportReport (publicly available)

Abstract

This report is prepared by GEUS for Forsyning Helsingør with the objective to assess the geothermal potential of sandstone formations in the Helsingør area. These formations include Lower Cretaceous Unit, Lower Jurassic Unit, the Gassum Formation and the Bunter Sandstone Formation.

GEUS has recently assessed the regional geothermal potential in Denmark at several local areas. This includes a pre-investigation of the need for improving seismic coverage in the Helsingør area in order to assess the geothermal potential (Mathiesen et al., 2005). In addition GEUS has conducted studies of the regional development of the investigated formations (Mathiesen et al., 2009).

This report builds on all available and released data that are relevant for an assessment of the geothermal potential at the three locations of interest as specified by Forsyning Helsingør. The present database includes 2D seismic data, well data, wireline log data, cores, core analysis data and cuttings descriptions. The report contains both a quantitative petrophysical interpretation of the investigated sandstone formations based on well-logs and the existing cores in order to estimate the net-to-gross ratio along with porosity, permeability and transmissivity, and furthermore an interpretation of the existing seismic data in order to map the depth to the formations and to investigate the presence of faults. As no wells are situated in immediate vicinity of the areas of interest the assessment is based on well data from the Karlebo-1/1A, Lavø-1, Margretheholm-1/1A and the Stenlille wells supported by GEUS´ general geological interpretations of the Norwegian-Danish Basin and Fennoscandian Borderzone.

The report includes:

1. An assessment of the potential reservoirs in the Helsingør area based on well data (from Karlebo-1/1A, Lavø-1, Margretheholm-1/1A and the Stenlille wells) and GEUS’ regional geological model, focussing primarily on the Gassum and Bunter Sandstone formations as well as the Lower Cretaceous Unit and Lower Jurassic Unit; the latter two units do not have formal lithostratigraphic names yet.
2. A petrophysical evaluation of the Karlebo-1/1A, Lavø-1, Margretheholm-1/1A and the Stenlille-1 well in order to assess the net sand thickness, net-to-gross ratio, reservoir porosity, permeability and transmissivity of the Lower Cretaceous Unit and Lower Jurassic Unit and the Gassum and Bunter Sandstone formations.
3. An interpretation of the existing released seismic data in the greater Helsingør area in order to map the distribution, depth and lateral continuity of the Lower Cretaceous Unit, the Lower Jurassic Unit and the Gassum and Bunter Sandstone formations.
Original languageEnglish
Place of PublicationCopenhagen
PublisherGEUS
Commissioning bodyForsyning Helsingør Varme A/S
Number of pages65
Volume2013
DOIs
Publication statusPublished - 12 Mar 2013

Publication series

NameDanmarks og Grønlands Geologiske Undersøgelse Rapport
PublisherGEUS
No.20
Volume2013

Keywords

  • Denmark

Programme Area

  • Programme Area 3: Energy Resources

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