Geomechanical modelling of spent fluid reinjection in the Hengill geothermal field ...

• Main Authors: Ritz, Vanille, Rinaldi, Antonio Pio, Colas, Elisa, Castilla, Raymi, Meier, Peter M., Wiemer, Stefan
• Format: Text
• Language: English
• Published: ETH Zurich 2020
• Subjects: Iceland
• Online Access: https://dx.doi.org/10.3929/ethz-b-000466352; http://hdl.handle.net/20.500.11850/466352

Monitoring micro-seismicity during operations of a geothermal field is critical to the understanding of seismic hazard and changes in the reservoir. In the context of a geothermal project, induced earthquakes are an important tool to enhance the permeability and thus productivity of reservoirs and to image structure and processes. However, felt and/or damaging earthquakes are a major threat to societal acceptance and regulatory license to operate. With the adaptive data-driven tool ATLS (Adaptive Traffic Light System), we aim at managing and mitigating the risk posed by induced earthquakes during stimulation and operations, while at the same time ensuring and optimising the productivity.The demonstration site for the application of ATLS lies in the Hengill volcanic region located in the South-West of Iceland, host to two power plants (Hellisheiði and Nesjavellir) with a total production capacity of 423 MWe and 433MWth. The production of energy and heat is accompanied by reinjection of the spent geothermal ... : EGUsphere ...