| Title | A geodetic monitoring of the Soultz-sous-Forêts and Rittershoffen geothermal sites |
|---|---|
| Authors | Christine Heimlich, Frédéric Masson, Noël Gourmelen |
| Year | 2014 |
| Conference | European Geothermal Workshop |
| Keywords | GNSS, InSAR, Geothermal monitoring, Time series |
| Abstract | The geothermal site of Soultz-‐sous-‐Forêts began as a research site for deep geothermal production in the 80s and is converted to an electrical power plant in 2008. A second power plant, ECOGI, is in development near the village of Rittershoffen located at 7 km from Soultz-‐sous-‐Forêts. Both deep geothermal sites benefit of the natural circulation of geothermal water in deep altered granites. Seismic and aseismic slips were observed on the Soultz-‐sous-‐Forêts power plant. Therefore, we establish a long-‐term geodetic monitoring of the geothermal sites of Soultz-‐sous-‐Forêts and Rittershoffen in order to better understand the process involved in geothermal energy. The geothermal field will be monitor at the different periods of its evolution: in the natural state of the site, during the drilling period, during stimulation and during the production period. The monitoring strategy combines two spatial geodesy methods: global Navigation Satellite System (GNSS) and Synthetic Aperture Radar Interferometry (InSAR). We present here the results of our monitoring in the natural state of the geothermal sites (2012-‐2014) and during the drilling phase of ECOGI site (2012 and 2014). We present also the result of the processing of the archive of ERS observation from 1992 to 2010 (drilling and production period for the Soultz-‐sous-‐Forêts power plant). |