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Fig. 11 | Geothermal Energy

Fig. 11

From: New results on the gravity monitoring (2014–2017) of Soultz-sous-Forêts and Rittershoffen geothermal sites (France)

Fig. 11

Rittershoffen maps of interpolated gravity double differences in µGal measured on the 23rd of June 2015 (a) and on the 29th of June 2017 (b) before and after the beginning of the production, respectively. The geothermal energy exploitation has begun on the 19th of May 2016. The same interpolation color scale is used for the two maps. The station codes are indicated in red and the double differences in blue. On the 23rd of June 2015, no observation was done at station 20. The isolines values are written in black. Well trajectories are represented in blue with their open-hole in red: GRT1 well is the injection well and GRT2 well is used for the production. We superimposed also the cumulated induced seismicity epicenters from January to July 2017 on the second map. They are concentrated near the injection well

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