Open AccessSeismic characterization of geothermal sedimentary reservoirs: A field example from the Copenhagen area, Denmark
Author(s) -
Kenneth Bredesen,
Esben Dalgaard,
Anders Mathiesen,
R. Rasmussen,
Niels Balling
Publication year - 2020
Publication title -
interpretation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.362
H-Index - 25
eISSN - 2324-8866
pISSN - 2324-8858
DOI - 10.1190/int-2019-0184.1
Subject(s) - geology , seismic inversion , geothermal gradient , facies , aquifer , reservoir modeling , geothermal exploration , seismology , sedimentary rock , amplitude versus offset , petrology , geophysics , geothermal energy , petroleum engineering , geomorphology , geochemistry , groundwater , geotechnical engineering , amplitude , data assimilation , physics , structural basin , meteorology , quantum mechanics
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.