Geothermal Energy

Ingrid Stober: Studied Earth Sciences at the University of Freiburg (Germany). 1985 Ph.D. with the dissertation on “groundwater flow patterns in hard-rock aquifers, results from pumping- and injection-tests”. 1994 habilitation thesis on "hydrogeology of crystalline rocks of the Black Forest, Germany". She is working at the Geological Survey of Baden-Württemberg, with the responsibility for geothermal energy. Her research interests are geothermal waters and hydraulics.Kurt Bucher: Studied Geology at ETH Zurich (Switzerland). 1977 Ph.D. in metamorphic petrology. Assistant professor at the University of Basel (Switzerland), Professor of Geology at the University of Oslo (Norway) and is currently Full Professor of Mineralogy and Geochemistry at the University of Freiburg (Germany). His research is focused on field studies of water-rock interaction processes in deep geothermal systems.

Book: Petrogenesis of metamorphic rocks (Bucher & Frey) Springer-Verlag 2002 Customer reviews on Amazon.com one of the best textbooks available, 10. April 2000 Von Katharina Dubach Petrogenesis of metamorphic rocks is probable the best textbook available for students of metamorphic petrology. In a short, concise form it introduces the reader to the principles of metamorphic petrology as well as to the evolution of different rock types under changing metamorphic conditions. Excellent source for anyone studying metamorphic rocks., 2. Juni 1999 Von Ein Kunde This book is divided into two sections. The first section deals with the basic princiles of metamorphism, including composition of source rocks, types, processes and condidtions of metamorphism. A very detailed description on the construction of metamorphic projections is also included. Part two covers the metamorphism of different rock compositions including ultramafic, mafic, carbonate, pelitic, and granitoid rocks. This section is very detailed, without bogging down with specific examples of metamorphism.

• 1. Thermal Structure of the Earth.-1.1 Renewable Energies, Global Aspects.- 1.2 Internal Structure of the Earth.- 1.3 Energy budget of the planet.- 1.4 Heat transport and thermal parameters.- 1.5 Brief outline of methods for measuring thermal parameters.- 2. History of Geothermal Energy Use.- 2.1 Early utilization of geothermal energy.- 2.2 History of Utilization of Geothermal Energy in the last 150 Years .- 3. Geothermal Energy Resources.- 3.1 Energy.- 3.2 Significance of "renewable" energies.- 3.3 Status of geothermal energy utilization.- 3.4 Geothermal energy sources.- 4. Application of Geothermal Energy.- 4.1 Near surface Geothermal Systems.- 4.2 Deep Geothermal Systems.- 4.3 Efficiency of geothermal systems.- 4.4 Major geothermal fields, high enthalpy fields.- 5. Potentials and Perspectives of Geothermal Utilization.- 6. Geothermal Probes.- 6.1 Planning Principles .- 6.2 Construction of ground source heat exchangers.- 6.3 Dimensioning and design of geothermal probes.- 6.4 Drilling methods for borehole heat exchanger.- 6.5 Backfill and grouting of geothermal probes.- 6.6 Construction of deep geothermal probes.- 6.7 Operating geothermal probes: Potential risks, malfunctions and damages.- 6.8 Special systems and further developments.- 7. Geothermal Well Systems.- 7.1 Building geothermal well systems.- 7.2 Chemical aspects of two-well systems.- 7.3 Thermal range of influence, numerical models.- 8. Hydrothermal Systems, Geothermal Doublets.- 8.1 Geology and tectonic structure of the underground.- 8.2 Thermal and hydraulic properties of the target aquifer.- 8.3 Hydraulic and thermal range of hydrothermal doublets.- 8.4 Hydrochemistry of hot waters from great depth.-  8.5 Reservoir-improving measures, Efficiency-boosting measures, Stimulation.- 8.6 Productivity risk, Exploration risk, Economic efficiency.- 8.7 Some site examples of hydrothermal systems.- 8.8 Project planning of hydrothermal power systems.- 9.  Enhanced-Geothermal-Systems (EGS), Hot-Dry-Rock Systems (HDR),Deep-Heat-Mining (DHM).- 9.1 Techniques, procedures, strategies, aims.- 9.2 Historical development of the hydraulic fracturing technology, early HDR sites.- 9.3 Stimulation procedures.- 9.4 Experience and dealing with micro-seismicity.- 9.5 Recommendations, Notes.- 10.Environmental Issues Related to Deep Geothermal Systems.- 10.1 Seismicity related to EGS projects.- 10.2 Interaction between geothermal system operation and the subsurface.- 10.3 Environmental issues related to surface installations and operation.- 11. Drilling techniques for deep wellbores.- 13. Geophysical methods, exploration and analysis.- 12.1 Geophysical pre-drilling exploration, seismic investigations.- 12.2 Geophysical well logging and data interpretation.- 13.Testing the hydraulic properties of the drilled formations.- 13.1 Principles of hydraulic testing.- 13.2 Types of tests, planning and implementation, evaluation procedures.- 13.3 Tracer Experiments.- 13.4 Temperature evaluation methods.- 14. The chemical composition of deep geothermal waters and its consequences for planning and operating a geothermal power plant.- 14.1 Sampling and laboratoryanalyses.- 14.2 Deep geothermal waters, data and interpretation.- 14.3 Mineral scales and materials corrosion.- 15. References