TY  - JOUR
ID  - epos1855
UR  - http://doi.org/10.1016/j.crte.2009.10.009
IS  - 7-8
A1  - Sanjuan, Bernard
A1  - Millot, Romain
A1  - Dezayes, Chrystel
A1  - Brach, Michel
N2  - Three deep wells (5000 m) have been drilled into a fractured granite basement at Soultz-sous-Foręts, within the Tertiary Rhine Graben, in order to develop a heat exchanger and produce electricity after the creation of an EGS reservoir. Very few analyses representative of the deep geothermal fluids are available because of frequent contamination by drilling fluids or injected waters. These indicate similar chemical and isotopic compositions (NaCl fluids) and high salinities (about 100 g/l) suggesting a common sedimentary origin and identical water?rock interaction processes at equilibrium temperatures close to 230 °C in a sedimentary rather than a granite reservoir. The latter would be situated closer to the Graben centre where the Triassic Buntsandstein formation is deepest and hottest. Tracer tests conducted after 2000 show that the deep native geothermal brine is omnipresent in the fluids discharged during the production and circulation tests. Its natural convective flux was estimated at 1?1.2 m3/h.
VL  - 342
TI  - Main characteristics of the deep geothermal brine (5km) at Soultz-sous-Foręts (France) determined using geochemical and tracer test data
AV  - none
EP  - 559
Y1  - 2010///
PB  - Elsevier
JF  - Comptes Rendus Geoscience
KW  - Heat exchanger; EGS reservoir; Well; Fluid; Geochemical analyses; Tracer tests; Circulation
SN  - 1631-0713
SP  - 546
ER  -