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Temporal Evolution and Risk Management of Induced Seismicity at the Rittershoffen Geothermal Plant (France)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 86th EAGE Annual Conference & Exhibition, Jun 2025, Volume 2025, p.1 - 5
Abstract
Summary
The Upper Rhine Graben (URG) in Western Europe is a prime region for deep geothermal energy, characterized by high geothermal gradients and fractured reservoirs. Among its notable projects, the Rittershoffen geothermal plant, operational since 2016, exemplifies efficient energy production with minimal carbon emissions. Designed as a doublet system, it generates 24 MWth of heat, significantly reducing CO2 emissions for a nearby bio-refinery.
To monitor and mitigate potential risks, a Traffic Light System (TLS) has been implemented, enabling operators to reduce flow rates in response to significant increases in microseismic activity. Cluster analysis has revealed a clear spatial distinction between seismic event clusters. While some clusters have remained active since the inception of the project, others have emerged during the recent exploitation phase, exhibiting lower b-values. This suggests changes in the physical mechanisms driving seismic activity over time
Proactive measures, including real-time monitoring, public engagement, and mitigation strategies, are key to maintaining safety and public trust. Rittershoffen’s success highlights the potential of geothermal energy in decarbonization while underscoring the need for continuous adaptation to the dynamic geomechanical environment. The project serves as a model for sustainable geothermal development, balancing energy needs with environmental and societal considerations.
© EAGE Publications BV