Science – Society – Technology
From: A systematic review of enhanced (or engineered) geothermal systems: past, present and future
Project | Operator | Description | Start date | Location | Rock type | Stimulation methods | Seismic event | Well depth (m) | End date | Reasons of abandonment |
---|---|---|---|---|---|---|---|---|---|---|
Bad Urach | Forschungs-Kollegium Physik des Erdkörpers (MIT 2006h) | EGS pilot by one borehole only (Tenzer 2001) | Germany (Tenzer 2001) | Gneiss (Tenzer et al. 2000) | Hydraulic fracturing (Schanz et al. 2003) | Microseismicity (Schanz et al. 2003) | 3,334 to 4,445 (Schanz et al. 2003) | Torn off bore rods in borehole (Wyborn 2011) | ||
Basel | Geopower Basel (Romano 2009) | Planning to develop EGS project (Ladner and Häring 2009) | 1996 (Giardini 2009) | Switzerland (Romano 2009) | Granite (Ladner and Häring 2009) | Hydraulic fracturing (Ladner and Häring 2009) | Frequent earthquakes (including 3.4 M) (Romano 2009) | 5,000 (Romano 2009) | 2009 (Giardini 2009) | Induced seismicity exceeding acceptable levels (Giardini 2009) |
The Southeast Geysers | AltaRock Energy (Romano 2009) | Redrill a well for EGS demonstration project (AltaRock Energy Inc. 2012) | 2008 (Cotler 2009) | USA (Romano 2009) | Greywacke (AltaRock Energy Inc. 2012) | Multiple fractures zones in wells (planned) (AltaRock Energy Inc. 2012) | Induced seismicity risk (Romano 2009) | 1,341 (AltaRock Energy Inc. 2012) | 2009 (AltaRock Energy Inc. 2012) | Wellbore collapsing and induced seismicity risk (Romano 2009) |