Transcript Slides
ENGINE Launching Conference, Orleans, 12-15 February 2006 The geothermal use of high-heat-production granites: the recycling of an old concept Förster, A., Förster, H.-J., Rossi, P., Cocherie, A., Guillou-Frottier, L., Schulman, K., Sliaupa, S. ENGINE Launching Conference, Orleans, 12-15 February 2006 ENGINE Launching Conference, Orleans, 12-15 February 2006 HHP-Granite Occurrences in Europe Germany: • Erzgebirge • Meißen Massif • Sax. Granulite Massif • Harz Mts. ENGINE Launching Conference, Orleans, 12-15 February 2006 Extension/Thickness Heat-Flow Density Pure Geothermics (Exploration) Radiogenic Heat Production Thermal Conductivity Fluid Regime Fracture/Fault Patterns ENGINE Launching Conference, Orleans, 12-15 February 2006 Heat Flow and Granite Thickness Zemaiciu Naumiestis Hot Granites 50 km ENGINE Launching Conference, Orleans, 12-15 February 2006 Geochemical Complexity ENGINE Launching Conference, Orleans, 12-15 February 2006 Radiogenic Heat Production ENGINE Launching Conference, Orleans, 12-15 February 2006 Alteration Effects in the Erzgebirge ENGINE Launching Conference, Orleans, 12-15 February 2006 Unaltered Erzgebirge Samples HHP ENGINE Launching Conference, Orleans, 12-15 February 2006 General Trends ENGINE Launching Conference, Orleans, 12-15 February 2006 General Trends Susceptibility to Leaching Uranium: 30-90 % Thorium: < 20 % Low-silica, Th-rich HHP granites form the most predestined resources some Erzgebirge granites Meißen Massif Saxonian Granulite Massif Armorican Massif Scottish Caledonides granites in the shields ENGINE Launching Conference, Orleans, 12-15 February 2006 Faults/Fractures Modern Stress Field Future Research Exploration Fluid-Rock Interaction Data Banking Typifying Granites for Geothermal Use ENGINE Launching Conference, Orleans, 12-15 February 2006 HHP granites exhibit a great potential geothermal resource. Is it feasible and economic to develop this potential? Where do we go from the Cornwall HDR experiment? ENGINE Launching Conference, Orleans, 12-15 February 2006 Commercial Productive hydrothermal Potentially commercial Enhanced geothermal Hot dry rock Suitable for reservoir enhancement* High Natural permeability Zero * Hydrofracture, targeted injection, acid leaching, directional drilling, etc. ENGINE Launching Conference, Orleans, 12-15 February 2006 Geomechanical Analysis and Modeling Numerical Thermohydraulic Modeling Future R & D Reservoir Engineering Different-Scale Experiments European Borehole Test Site ? Development of a Stimulation Technology