WP3 / WP6 Meeting WP3/WP6 meeting Investigation of Unconventional Geothermal Resources and in particular Enhanced Geothermal Systems Conveners A. Manzella & Th. Kohl BRGM BRGM Engine Launching Conference February 2006 Orléans, France Session 3

Engine, Launching conference, Orléans February 2006 > 2 Welcome in Orléans

Engine, Launching conference, Orléans February 2006 > 3 BRGM Map

Engine, Launching conference, Orléans February 2006 > 4 Outline > BRGM Presentation > ENGINE Contract > BRGM Geothermal activities > WP3/WP6

Engine, Launching conference, Orléans February 2006 > 5 BRGM > Major public institution in the Geoscience field. > Triple role of scientific research, public expertise and international cooperation > BRGM operates as the French Geological Survey > Objectives > Understand geological phenomena, develop new methodologies and techniques, produce and disseminate pertinent, high-quality data > Provide the necessary tools for public policies concerning surface, subsurface and natural-resource management, natural-risk and pollution prevention, and regional development and planning

Engine, Launching conference, Orléans February 2006 > 6 8 thematic areas: Mineral resources Water Development planning and natural risks Contaminated land and waste management Environmental metrology Mapping and geoinformation Geothermal energy and geological storage of CO2 Digital information systems

Engine, Launching conference, Orléans February 2006 > 7 BRGM Staff 844 employees, including more than 600 scientists, engineers and technicians 29 regional offices in metropolitan France and its Overseas Departments and Territories Teams working in more than 40 countries Turnover for 2003: €81.49 million Legal status: A public institution with industrial and commercial interests under the joint supervision of the Ministry for Research, the Ministry for Industry and the Ministry for Environment.

Engine, Launching conference, Orléans February 2006 > 8 Environment and Processes D. DARMENDRAIL Analysis and Mineral Characterisation A. M. FOUILLAC Regional Geological Surveys M. BEURRIER M. BEURRIER Development Planning and Natural Risks H. MODARESSI Mineral Resources J. TESTARD Water D. PENNEQUIN Geology and Geoinformation D. VASLET Operational Divisions Research C. FOUILLAC Public Service L. BEROUD International J.C. GUILLANEAU Production, Informatics and Quality F. LELANN Strategic Planning J. VARET General Secretary R. GUERILLON General Inspectorate P.L KIRCHER Human Resources M. BOUILLEAU Accounting J.P. RIBERT Communications and Publications G. LEHIDEUX-VERNIMMEN Information Systems and Technologies J.M. TROUILLARD Chairman Ph. VESSERON Managing Director D. Houssin

Engine, Launching conference, Orléans February 2006 > 9 Geological map of France at 1:50, maps (92% maps published)

Engine, Launching conference, Orléans February 2006 > 10 ENGINE Contract N° > Contract signed by ENGINE partners sent to the Commission on 23/12/05 > Contract signed by the Commission on 06/02/06 > According to the contract the pre- financing will be made within 45 days from the date of the Commission's signature (before 21/03/06) > Administrative questions: A. Beauce

Engine, Launching conference, Orléans February 2006 > 11 BRGM main geothermal activities EGS Pilot Plant : Soultz High enthalpie project : DOM ENGINE (EGS) & I-GET ( Geophysical exploration ) Low geothermal energy projects Very low geothermal energy projects Europe, 6FP, Ademe Ademe, Feder, Régions Europe, 6FP Ademe, Arene, EDF, Régions Europe, Ademe Fundings

Engine, Launching conference, Orléans February 2006 > 12 Heat & vapor

Engine, Launching conference, Orléans February 2006 > 13 WP3/WP6: Investigation of Unconventional Geothermal Resources and in particular Enhanced Geothermal Systems Integration of recent progress in knowledge concerning the European lithosphere Mechanical behaviour of the upper crust and its response to stress, fluid circulation and heat-flow gradients Exploring different types of geothermal reservoir – High-energy geothermal fields (active/recent volcanism and peripheral zones) – High-temperature / low-permeability reservoirs (hot dry rocks) – New deep, and possibly supercritical, geothermal reservoirs – Multipurpose geothermal reservoirs Technological challenge of the investigation phase – Improved exploration methods for deep geothermal resources – Combined geological and geophysical imaging methods for defining and assessing reservoirs for potential heat exchange – 3D modelling and imaging of permeable systems

Engine, Launching conference, Orléans February 2006 > 14 BRGM experience in geothermal exploration > Geophysical exploration (H. Fabriol) Resistivity survey Ex. Bouillante Gravity Magnetic studies > Geochemical exploration (B. Sanjuan) Gas survey (CO2, CH4, Helium) (La Réunion, Bouillante) Borehole fluid monitoring (Soultz, Bouillante, Martinique) Fluid composition (Chemistry, isotopic chemistry) > Geological exploration (A. Genter & H. Traineau) Volcanic and structural studies (La Réunion, Martinique, Bouillante, Dominique) Hydrothermal alteration (Bouillante, Soultz, Martinique) Borehole monitoring (Soultz, Urach, Martinique, Bouillante) Borehole imagery techniques (Soultz) Well logging in granite (Soultz)

Engine, Launching conference, Orléans February 2006 > 15 Application of geophysics to geothermal resources at BRGM > More than 25 years of experience into geothermal exploration in volcanic, granitic and sedimentary context Lesser Antilles, La Réunion, Milos, El Salvador, etc. Paris Basin and Limagne Basin Soultz-sous-Forêts (France) > Tools developed : Potential methods (gravity, magnetism) Electrical resistivity: DC and EM, MT Passive seismic: microseismicity and broadband for exploration and exploitation Marine seismic (shallow depth) Monitoring surface deformations: microgravity and SAR Interferometry > Meetings to be attended : Potsdam (Workshop 1), Pisa (Workshop 2) and Zürich (Workshop 3) > Exchange of personnel : ?? > Contact:

Engine, Launching conference, Orléans February 2006 > 16 Resistivity cross section at Bouillante (H. Fabriol) Fabriol et al., WGC05

Engine, Launching conference, Orléans February 2006 > 17 Fracture analysis at Soultz › about 14 km of image logs analysed Fractures collected from high- resolution oriented image logs AmplitudeTransit time Dezayes et al., WGC05

Engine, Launching conference, Orléans February 2006 > 18 3D modelling and geothermics > Bouillante, Guadeloupe, Volcanic formations > Limagne, North Massif Central, Clastic reservoirs

Engine, Launching conference, Orléans February 2006 > 19 3D Model at Bouillante (B. Sanjuan) EarthVision

Engine, Launching conference, Orléans February 2006 > 20 Thermal model & permeable zones at Bouillante

Engine, Launching conference, Orléans February 2006 > 21 Limagne Model: clastic reservoirs

Engine, Launching conference, Orléans February 2006 > 22 3D model of clastic reservoirs: sandstones-sands S1 <300 Lutetian Chattian Rupelian Priabonian Bartonian Basement Age (Ma) Reservoirs Stages Upper Oligocene Lower Oligocene Upper Eocene Ante Tertiary Middle Eocene Levels S3 S2 S4 Sequences

Engine, Launching conference, Orléans February 2006 > 23 WP3/WP6: Investigation of Unconventional Geothermal Resources and in particular Enhanced Geothermal Systems Integration of recent progress in knowledge concerning the European lithosphere Mechanical behaviour of the upper crust and its response to stress, fluid circulation and heat-flow gradients Exploring different types of geothermal reservoir – High-energy geothermal fields (active/recent volcanism and peripheral zones) – High-temperature / low-permeability reservoirs (hot dry rocks) – New deep, and possibly supercritical, geothermal reservoirs – Multipurpose geothermal reservoirs Technological challenge of the investigation phase – Improved exploration methods for deep geothermal resources – Combined geological and geophysical imaging methods for defining and assessing reservoirs for potential heat exchange – 3D modelling and imaging of permeable systems

Engine, Launching conference, Orléans February 2006 > 24 WP4/WP7: Drilling, stimulation and reservoir assessment Dynamics of the geothermal field, stimulation and reservoir assessment – Stress pattern – Stimulation and improvement of the permeability of a geothermal field – Dynamics of the fissured horizons and induced microseismicity – Reservoir physics and physical properties of rocks and hydro fracturing group – Fluids, rock-fluid interaction, tracer and geochemistry, scaling factor Drilling – Drilling cost effectiveness and feasibility of high- temperature drilling – Micro-drilling

Engine, Launching conference, Orléans February 2006 > 25 WP5/WP8: Exploitation, economic, environmental and social impacts Exploitation – Unconventional exploitation systems – Development of innovative tools for exploitation – State-of-the-art of down-hole fluid treatments – Plant and reservoir monitoring – Re-injection A global economic approach of geothermal energy – Sustainability of geothermal energy – Multiple integrated uses group – Socio-economic benefits of geothermal exploitations Environmental impacts – Barriers to development – Microseismicity and risk assessment related to stimulation and exploitation – Conditions for a 100% clean exploitation of geothermal energy Increasing policy makers awareness and public acceptance – Building a network for political support – Societal needs and public requirement – Communication policy

Engine, Launching conference, Orléans February 2006 > 26 WP9: Risk evaluation for the development of geothermal energy > Decision support systems enable an evaluation of the technical and socio-economic risk for the development of the geothermal energy