TY  - JOUR
A1  - Kwiatek, Grzegorz
A1  - Saarno, Tero
A1  - Ader, Thomas
A1  - Blümle, Felix
A1  - Bohnhoff, Marco
A1  - Chendorain, Michael
A1  - Dresen, Georg
A1  - Heikkinen, Pekka
A1  - Kukkonen, Ilmo
A1  - Leary, Peter
A1  - Leonhardt, Maria
A1  - Malin, Peter
A1  - Martinez-Garzon, Patricia
A1  - Passmore, Kevin
A1  - Passmore, Paul
A1  - Valenzuela, Sergio
A1  - Wollin, Christopher
T1  - Controlling fluid-induced seismicity during a 6.1-km-deep geothermal stimulation in Finland
JF  - Science Advances
N2  - We show that near-real-time seismic monitoring of fluid injection allowed control of induced earthquakes during the stimulation of a 6.1-km-deep geothermal well near Helsinki, Finland. A total of 18,160 m(3) of fresh water was pumped into crystalline rocks over 49 days in June to July 2018. Seismic monitoring was performed with a 24-station borehole seismometer network. Using near-real-time information on induced-earthquake rates, locations, magnitudes, and evolution of seismic and hydraulic energy, pumping was either stopped or varied-in the latter case, between well-head pressures of 60 and 90 MPa and flow rates of 400 and 800 liters/min. This procedure avoided the nucleation of a project-stopping magnitude M-W 2.0 induced earthquake, a limit set by local authorities. Our results suggest a possible physics-based approach to controlling stimulation-induced seismicity in geothermal projects.
Y1  - 2019
U6  - https://doi.org/10.1126/sciadv.aav7224
SN  - 2375-2548
VL  - 5
IS  - 5
PB  - American Association for the Advancement of Science
CY  - Washington
ER  -