RESERVOIR MODELING & CHARACTERIZATION TOOLS: APPLYING METHODS & TOOLS FROM THE OIL AND GAS INDUSTRY TO ENHANCE GEOTHERMAL RESOURCES Jacques CHOURAKI 1
NEW TOOLS & METHODS CURRENTLY, GEOSCIENTIFIC STUDIES, BASED ON TRADITIONAL GEOPHYSICAL APPROACHES (MAGNETOTELLURICS (MT), GRAVITY AND MAGNETICS), CAN ADDRESS THE GEOTHERMAL EXPLORATION DRILLING STRATEGY, BUT THE PROBABILITY OF SUCCESS REMAINS LOW, THOUGH HIGHER THAN IN THE OIL & GAS EXPLORATION. IN THIS CONTEXT, WHERE THE OBJECTIVE OF ACHIEVING MUCH HIGHER LEVEL OF SUCCESS WOULD SECURE MORE INVESTORS TOWARDS GEOTHERMAL PROJECTS, THE GEOTREF * CONSORTIUM IS CURRENTLY DEVELOPING A HIGH-END GEOTHERMAL EXPLORATION APPROACH COMBINING STANDARD METHODS WITH ADAPTED METHODS AND SOFTWARE TOOLS ROUTINELY USED IN OIL & GAS EXPLORATION AND PRODUCTION TOWARD GEOTHERMAL ENERGY. THIS NEW APPROACH IS GLOBALLY COST-EFFECTIVE BY REDUCING THE RISK OF MAKING INAPPROPRIATE DRILLING OR UNCLEAR STEAM FIELD DEVELOPMENT DECISIONS. THE INITIAL INVESTMENT (PREFEASIBILITY STUDIES) IS HIGHER BUT JUSTIFIED BY A BETTER UNDERSTANDING OF THE RESERVOIR AT THE EARLIEST STAGE OF A PROJECT, AND THE REALIZATION OF RELIABLE RESERVOIR PERFORMANCE FORECASTING. * GEOTREF: MULTIDISCIPLINARY INNOVATION AND DEMONSTRATION PLATFORM FOR THE EXPLORATION AND DEVELOPMENT OF GEOTHERMAL ENERGY IN FRACTURED RESERVOIRS 2
Reservoir characterization and modeling objectives ESTIMATING THE GEOTHERMAL RESERVOIR POTENTIAL Conceptual model Kolker et al. 2011 Volumetric heat in place evaluation Group 1 Parameters: Group 2 Parameters: Reservoir Area (km2) Volumetric Heat Capacity (kj/m3-k) Reservoir Depth (m) Rejection Temperature ( C) Reservoir Thickness (m) Conversion Efficiency (%) Reservoir Temperature ( C) Plant or Project Life (years) Thermal Recovery Factor (%) Plant Load Factor (%) Gard & Combs 2011
Reservoir characterization and modeling objectives ESTIMATING THE GEOTHERMAL RESERVOIR POTENTIAL OPTIMIZING (PRODUCER AND INJECTOR) WELL LOCATIONS AND RATES
Reservoir characterization and modeling objectives ESTIMATING THE GEOTHERMAL RESERVOIR POTENTIAL OPTIMIZING (PRODUCER AND INJECTOR) WELL LOCATIONS AND RATES QUANTIFYING PRODUCTION UNCERTAINTIES RESULTING FROM SPATIAL STRUCTURAL AND GEOLOGICAL UNCERTAINTIES Geological uncertainty T F(Q) Production uncertainty Proba Q min Q target Q max
Reservoir characterization and modeling objectives ESTIMATING THE GEOTHERMAL RESERVOIR POTENTIAL OPTIMIZING (PRODUCER AND INJECTOR) WELL LOCATIONS AND RATES QUANTIFYING PRODUCTION UNCERTAINTIES RESULTING FROM SPATIAL STRUCTURAL AND GEOLOGICAL UNCERTAINTIES PERFORMING RESERVOIR FORECASTING Mass production rate 400 P 350 10 300 P 50 250 P 200 90 150 100 50 0 0 5 10 15 20 25 30 35 40 Time (year)
GEOTREF : r&d project Multidisciplinary innovation and demonstration platform for the exploration and development of geothermal energy in fractured reservoirs FOUR-YEAR PROJECT INCLUDING R&D, EXPERIMENTAL AND DEMONSTRATION ASPECTS PROJECT SUPPORTED BY FRENCH GOVERNMENT PROGRAM INVESTING FOR THE FUTURE ADAPTING METHODS ROUTINELY USED IN OIL & GAS EXPLORATION AND PRODUCTION TO GEOTHERMAL E&P DIRECTED BY THREE FRENCH PRIVATE COMPANIES INVOLVING NINE INTERNATIONALLY RENOWNED FRENCH RESEARCH LABORATORIES AND 14 PHD & POST-DOC
GEOTREF : aim R&D Evaluation of Resource before first well (Prefeasibility) Appraisal of Resource After first exploration wells (Feasibility) Improvement of Resource Development (Reservoir Production) Development of a Geothermal Software Platform in GOCAD-SKUA EXPERIMENTAL Lab and full field micro-seismic experiments FULL FIELD DEMONSTRATION All prefeasibility study methods All feasibility study methods (including full size exploration drilling) Marine geophysical acquisition
GEOTREF : work program Part 1: Project coordination R&d Part 2: Surface geological studies & remote sensing Part 3: geophysical studies Part 4: Geochemical studies Part 5: Processing of well data Part 6: Characterization of natural and induced fracture systems Part 7: Reservoir model Part 8: Software platform integrated in GOCAD-SKUA Experimentation Part 9: Micro-seismic experimentation & investigation Demonstration Part 10: Prefeasibility study Part 11: Feasibility study Part 12: Methodological guides
GEOTREF : partnership PRIVATE COMPANIES Lead Partner & Coordinator: Geothermal project management, prefeasibility and feasibility studies, surface geophysics, drilling engineering and supervision Reservoir characterization, modeling, simulation and engineering, naturally fractured reservoirs, uncertainties and risk assessment, scientific software development Passive micro-seismicity applied to site surveillance, induced micro-seismicity applied to the characterization of fractured environments
GEOTREF : partnership RESEARCH LABORATORIES Structural and Geological Characterization and Modeling Analysis and Interpretation of Logs, Well Imagery, Cores and Cuttings Seismic and Non-seismic Geophysics Flow and Heat Transport in Porous and Fractured Media Hydro-thermo-mechanical Modeling Multiphase Flows in & around Wells Geomechanics, Rock Physics Geochemistry, Petrophysics Naturally Fractured Reservoirs Micro-seismicity
THANK YOU FOR YOUR ATTENTION! Contact Information: Phone: +590 590 324 400 Fax: +590 590 911 539 Email: contact@teranov.fr www.geotref.org www.teranov.com