1. Températures à 5000 m de profondeur
Soultz Project
Concept HDR
Températures à 5000 m de profondeur
<60°C
60-80
80-100
>240°C
Fracture Permeability - Petrophysics
Identification of hydraulic geothermal transfer zones
Caracterization of the reservoir life time
J.J. Royer – J. Sausse

2. A pilote power station of 6MW in order to build a prototype of 25 MW
Final Soultz Project
GPK4
GPK2
200°C
200°C
70°C
50 l/s
50 l/s
5000 m
100 l/s
A pilote power station of 6MW in order to build a prototype of 25 MW

3. High Surface Heat Flow Anomaly
Geothermal Heat Flow of 80 mW/m2 within the graben
Anomaly explained by several convective cells from East to West
Anomal Surface Heat Flow

4. (Renard and Courrioux, 1994)
Data 93 94 95 96
2000
Vertical Section
Geology and seismic sections, Wells, Logings, faults,
Micro-seismic cloud (93, 94, 95, 96, 2000, 2003, 2004)
Objectives : to predict the permeability
To estimate the yield and life time of the geothermal reservoir
(Renard and Courrioux, 1994)
Top view
Microseismicity
Utilisee pour la modelisation : 3 outils

5. GPK1 Interpretating flow logs and logings permeability clear evidences
cumulated electric ARI apertures (microns)
Q (l/s)
2000
4000
6000
8000
10000
12000
14000
16000
2800
2900
3000
3100
3200
3300
3400
3500
Sausse and Genter, 2005
clear evidences
GPK1
subvertical and progressive evolution of the curve
thin structures regularly spaced
 connected network of fractures
(pervasive alteration of the granite matrix)
smaller fraction of the flows during injection
Flow log
discontinuous curve
drains or clustered structures
 isolated percolation
features
GPK1 depth (m)

6. Fracture Opening during Hydrofracturation

7. Shearing Model

8. Coupling thermo-hydraulic modeling of fractured porous mediums.
GPK1
GPK2
100m N
100m
GPK1
GPK2
East View
Vertical Section
Top View
V=cst, Stml inchangees pdt resolution tracer et temp
300m
Pressure Field
Double permeability Model
Thermo-mechanical Model
360 streamlines – cells - Soultz
Liad © 2005

9. 3D Numerical Modeling of the Reservoir at 5000m
Modeling the life time of the geothermal reservoir
3D Numerical Modeling of the Reservoir at 5000m
Bottom well temperature
Top View
Time (in year)
Total power at well bottom
Animation at Soultz (France):
Cool fluid invading the hot deep (5000m) rocks Temperature of injection 70°C
Temperature at production vs time
500m
Time (in year)

10. Total power at well bottom
Results
Characterization of fluids circulation in low permeable fractured medium
Poro-elastic medium
Interaction fluid rock (weathering, precipitation)
Thermo-mechanical effects
Exchange sediment basement
Bottom well temperature
Time (in year)
Total power at well bottom
Time (in year)