期刊
GEOTHERMICS
卷 107, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.geothermics.2022.102585
关键词
Fluid-injection induced seismicity; Geothermal limestone reservoir; Seismic hazard
This study presents the main features of geothermal production history and seismic data at the Balmatt geothermal doublet in Mol, Belgium. It identifies a hidden fault zone not found during exploration and provides new constraints on seismic activity and hazard.
We present the main features of the geothermal production history between 2018 and 2019 at the Balmatt geothermal doublet (3-4 km depth), located in Mol in northern Belgium, and the recorded seismic data set which represents the first return of experience on the seismic response of the fractured Lower Carboniferous Limestone reservoir in the Campine Basin to fluid injection. The study has been motivated by the occurrence of a felt M-L = 2.2 event leading to the temporal suspension of the project due to a red-light status of the traffic light system. Even though the seismic data set is comparatively limited (Mc similar to 0.6), thanks to a precise analysis of the seismic source features, we derive a new conceptual structural reservoir model that includes a hidden fault zone not seen during the exploration and provides new constraints on the main hydro-mechanic processes involved in the triggering of seismicity and seismic hazard.
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