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EGS Resource in France and Europe Albert Genter , L. Guillou-Frottier, N. Debeglia, Ch. Dezayes

This conference presentation discusses various types of Enhanced Geothermal Systems (EGS) and their potential in different geological conditions in France and Europe. It highlights the importance of geophysical data, lithology, deep geology, fault networks, and predictive mapping for analyzing EGS resources. The presentation also emphasizes the need for geophysical measurements and modeling tools in understanding temperature, heat flow, stress regime, and permeability distribution for successful EGS implementation.

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EGS Resource in France and Europe Albert Genter , L. Guillou-Frottier, N. Debeglia, Ch. Dezayes

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

  2. 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 ENGINE Launching Conference - BRGM Orléans

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

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

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

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

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

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

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

  10. Paris basin: Second order geothermal anomaly ENGINE Launching Conference - BRGM Orléans

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

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

  13. EGS potential in Europe

  14. EGS potential calculations Quantity of energy: Eth (J) Eth = CrdrV(Tr-Ts) Cr : heat capacity of the granite in J/kg.K-1, dr: granite density kg/m3, V: rock volume in m3, Tr: temp. at depth in °C, Ts: temp. at surface in °C Method of Jung et al. 1992 Temperature map areas with T°>180°C ENGINE Launching Conference - BRGM Orléans

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

  16. 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 ENGINE Launching Conference - BRGM Orléans

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