Seismic characterization of geothermal sedimentary reservoirs: A field example from the Copenhagen area, Denmark

Author:

Bredesen Kenneth1ORCID,Dalgaard Esben2ORCID,Mathiesen Anders3,Rasmussen Rasmus3,Balling Niels4

Affiliation:

1. Aarhus University, Department of Geoscience, Aarhus, Denmark and Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark.(corresponding author).

2. Qeye, Copenhagen, Denmark..

3. Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark..

4. Aarhus University, Department of Geoscience, Aarhus, Denmark..

Abstract

We have seismically characterized a Triassic-Jurassic deep geothermal sandstone reservoir north of Copenhagen, onshore Denmark. A suite of regional geophysical measurements, including prestack seismic data and well logs, was integrated with geologic information to obtain facies and reservoir property predictions in a Bayesian framework. The applied workflow combined a facies-dependent calibrated rock-physics model with a simultaneous amplitude-variation-with-offset seismic inversion. The results suggest that certain sandstone distributions are potential aquifers within the target interval, which appear reasonable based on the geologic properties. However, prediction accuracy suffers from a restricted data foundation and should, therefore, only be considered as an indicator of potential aquifers. Despite these issues, the results demonstrate new possibilities for future seismic reservoir characterization and rock-physics modeling for exploration purposes, derisking, and the exploitation of geothermal energy as a green and sustainable energy resource.

Funder

Innovation Fund Denmark

Publisher

Society of Exploration Geophysicists

Subject

Geology,Geophysics

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