Science – Society – Technology
Table 2 Summary of the seismicity observed during the development of the Rittershoffen geothermal reservoir
From: Seismicity induced during the development of the Rittershoffen geothermal field, France
First event Last event | NEVT | MMIN to MMAX | ΔDepth (m TVD MSL) | QMAX (L/s) | WHPMAX (MPa) | Volume (m3) | Duration (h) | Productivity and injectivity indices (L/s/bar) |
|---|---|---|---|---|---|---|---|---|
Drilling of GRT-1 | ||||||||
 2012-11-29T22:23:33  2012-11-29T22:51:42 | 26 | − 1.3 to 0.6 | 1200–2000 | – | – | – | – | P = 0.45 |
GRT-1 production test | ||||||||
 None | – | – | – | – | – | 6400 | 216 | P = 0.6 |
Thermal stimulation of GRT-1 | Â | |||||||
 2013-04-24T07:24:05  2013-04-25T09:44:28 | 146 | − 1.5 to 0.3 | 1300–3050 | 25 | 2.8 | 4135 | 62.6 | I = 0.9 |
Pre-stimulation test and chemical stimulation of GRT-1 | ||||||||
 None | – | – | – | 27 + 5 | 2.5 +/ | 357 + 269 | 6.5 + 14.2 | I = 1.7 |
Hydraulic stimulation of GRT-1 and injection test | ||||||||
 2013-06-27T15:23:38  2013-07-01T00:19:11 | 831 | − 1.4 to 0.9 | 1200–2000 | 80 + 60 | 3.3 + 2.2 | 3180 + 820 | 21.7 + 6.5 | I = 2.5 |
 2013-07-02T04:46:15  2013-07-12T22:14:23 | 161 | − 0.9 to 1.6 | 1300–2050 | – | – | – | – | – |
Drilling of GRT-2 | ||||||||
 2014-05-26T12:18:06  2014-05-26T23:43:55 | 184 | − 1.5 to 1.0 | 1250–1850 | – | – | – | – | P = 2.8 to 3.5 |