1. 12-15 February 2006 EGS Resource in France and Europe Albert Genter, L. Guillou-Frottier, N. Debeglia, Ch. Dezayes BRGM Engine Launching Conference 12-15 February 2006 Orléans, France Session 3

2. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans What types of EGS systems? Fractured rocks located in a young graben conditions with low permeability conditions ex. Upper Rhine Graben Fractured rocks around active hydrothermal systems ex. Bouillante, Larderello Deep hard rocks within a complex basin ex. Pannonian basin Deep sedimentary formations ex. North German basin High Heat Production granites ex. Variscan granites Deep fractured granites within stable areas ex. Paris basin

3. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans EGS Concept Heat Structural conditions Tectonic conditions Stress regime Suitable lithology Hard rocks Fluids Low permeability Pre-existing fractures Sufficient temperatures

4. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans EGS Concept 3D tools Temperatures Fractures Stress conditions Stress measurements Other techniques Lithology Gravi-mag data Borehole data Fluids Borehole data Thermal springs Field mapping Seismic survey Borehole data Extrapolated Temp. maps

5. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans Rhine graben Urach Pannonian basin Greek grabens Massif central Limagne Provence Tuscany Latium German basin Cornwall Campidano Catalonia Molasse basin Eger Extrapolated temperatures at 5 km depth Lithuania Turkey Hurtig et al., 1992 modified by GEIE EMC, 2000

6. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans Tertiary graben + volcanism Complex back-arc basin + volcanism Thick sedimentary basin Outcropping granite Alpine front Schematic map of the main EGS types

7. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans Dèzes et al., 2004 Ziegler et al., Eucor-Urgent project The Western European Rift System: first order anomaly

8. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans St Soultz Lithology derived from gravi-mag inversion Rhine graben

9. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans EGS surface 30,000km² Temperatures and Tertiary grabens in France

10. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans Paris basin: Second order geothermal anomaly

11. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans Paris basin: Gravi-Magnetic data Bouguer Anomaly Magnetic data - vertical gradient

12. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans Deep basement rocks below the Paris basin Granites

13. 12-15 February 2006 EGS potential in Europe

14. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans EGS potential calculations Quantity of energy: E th (J) E th = C r d r V(T r -T s ) C r : heat capacity of the granite in J/kg.K -1, d r : granite density kg/m 3, V: rock volume in m 3, T r : temp. at depth in °C, T s : temp. at surface in °C Method of Jung et al. 1992 Temperature map areas with T°>180°C

15. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans France Spain Italy Poland Romania Turkey Greece Bulgaria Germany Hungary Sweden Slovakia Austria Czec Serbia UK DK Croatia Bosnia EGS Potential in Europe High HFR potential Moderate HFR potential Low HFR potential No calculations but promising HFR potential

16. 12-15 February 2006 ENGINE Launching Conference - BRGM Orléans Conclusion > Several EGS types > Local-scale resource analysis based on geophysical data Lithology and deep seated geology Large-scale faults > Needs for predictable EGS maps Geophysical measurements/methods able to image deep geology (I-GET) Geothermal resource (temperature, heat flow) Stress regime Permeability distribution 2D, 3D tools and modelling