In situ Geothermal Lab Groß Schönebeck

As a member of the Helmholtz Association, the GeoForschungsZentrum (GFZ) is the National Research Centre for Geosciences in Germany Foundation under public law Founded in 1992 About 1090 employees Annual Budget (2011): 48 million from programme funding 39 million from third-party funding 2

Helmholtz-Association 18 research centres with ~ 300 institutes 33 000 staff 11 000 senior-scientists and engineers 5500 doctoral students Budget: 3.4 billion Euros 3

Research Profile of GFZ Earth System Analysis Geodesy & remote Sensing Physics of the Earth Geodynamics and Geomaterials Chemistry and Material Cycles Earth Surface Processes Earth System Management Geoengineering Centres Centre for CO 2 Storage International Centre for Geothermal Research ICGR Centre for Early Warning (Tsunami Early Warning System) Centre for Geoinformation Technology Earth System Monitoring MESI (Modular Earth Science Infrastructure) Plate Boundary Observatories (Chile, Turkey) Global Change Observatories (Southern Africa, Central Asia) TERENO (Terrestrial Environmental Observatoria; Germany) 4

International Centre for Geothermal Research (ICGR) Research on reliable, efficient geothermal technologies Good practice guides Dissemination: technology- and know-how-transfer Site-independent concepts for an environmentally friendly and sustainable use of geothermal energy

Geothermal Resources in Germany Rostock Hamburg Neustadt Glewe N o r d de u t s c h e s B e c k e n Groß Schönebeck Hannover Berlin Köln Thüringisches Becken Leipzig Dresden Soultz Basel Frankfurt Ober Rheingraben Landau Stuttgart München Bayrisches Unterhaching Molassebecken Altheim Hydrogeothermal resources Potential hydrothermal resources No known hydrothermal resources Basement and/or thin sedimentary cover

Geothermal Resources in Germany

Geothermal technologies Conditions Limited temperatures (100 C 200 C) Geothermal fluid flow rate 50 500 m³/h (~14 140 kg/s) Thermal capacity per production well ~ 5 to 50 MW th Site specific geothermal fluid composition Challenges Find the reservoir Explore & stimulate the reservoir Efficient energy supply Focus Technologies for a sustainable heat and/or power supply..also from reservoirs with low natural permeability

In situ Geothermal Lab Groß Schönebeck

In situ Geothermal Lab Groß Schönebeck Exploration Access Engineering Energy supply Geology Geophysics Drilling & Logging Reservoir Engineering Process & Energy Engineering Reservoir Feasibility Utilization concept System Performance

History (1) E GrSk 3/90 Gas exploration well 4.240 m, 150 C (2) Gt GrSk 4/05 Geothermal well 4.400,44 m, 150 C 2000 2004 stimulation sandstone productivity improved deepened to 4.309 m, massive hydraulic stimulation production test productivity improved distributed temperature measurements, long term injection tests 2006-2011 massive stimulation (volcanic rocks), gel-proppant-frac (sandstone) productivity improved well cleaning, completion installation downhole pump communication experiment

In situ Geothermal Lab Groß Schönebeck Exploration Access Engineering Energy provision Geology Geophysics Drilling Logging Reservoir Engineering Process & Energy Engineering Reservoir Feasibility Utilization concept System Performance

Exploration Geology & Geophysics (from Moeck et al. 2009) (from Bauer et al. 2010)

Access Drilling & Logging

In situ Geothermal Lab Groß Schönebeck Exploration Access Stimulation Energy provision Geology Geophysics Drilling Logging Reservoir Engineering Process & Energy Engineering Reservoir Feasibility Utilization concept System Performance

Reservoir Engineering Modelling Stimulation

Communication Experiment Operational characteristics of the doublet Reservoir behaviour dynamic behaviour of pressures and temperatures reservoir-volume involved in geothermal fluid circulation hydraulic limits of the reservoir (no flow boundaries) Electrical submersible pump (ESP) in ~1200 m

Geothermal fluid loop

Geochemical Investigations classification of fluids regarding geological aspects chemical composition of the geothermal fluid during operation and throughout the fluid loop accompanying gas analyses under in situ conditions comparison of different corrosionmonitoring systems identification of corrosion relevant parameter catalogue for fluid-specific material use corrosion test rack mobile fluid monitoring (FluMo) on-site laboratory

Systematic investigations: plant- and process behaviour component behaviour (efficiency, reliability, part load) long term behaviour of plant set-up coupled investigation of subsurface and surface processes optimisation potential (design and operation) influence of the cold end Research power plant comprehensive monitoring holistic approach for improved geothermal low-temperature power plants

Research power plant

Research power plant Heat input Gross power Net power

pirmary heat exchanger Evaporator module 1 Heat exchangers Module 3 Turbogenerator Module 1, 2 & 3 Evap. & preheater Module 2 Preherater module 1 Recuperator-condenser module 1 & 2

Geothermal research platform

International cooperations and initiatives European Union: GEISER Geothermal Engineering Integrating Mitigation of Induced Seismicity in Reservoirs (development of strategies to mitigate induced seismicity) Indonesia: Sustainability concepts for exploitation of geothermal reservoirs in Indonesia (exploration/reservoir engineering/geothermal plant technology/capacity building) USA Cooperation University of Reno: Evaluation of the geothermal resource potential of Nevada/Canada Helmholtz-Alberta Initiative HAI: Cooperation Helmholtz Association University of Alberta (Geothermal assessment for the Alberta Basin) European Energy Research Alliance (EERA): ICGR Coordinator of the Joint Programme on Geothermal IPCC (Intergovernmental Panel on Climate Change) contribution to the Renewable Energy Report

Geothermal Power Generation in Remote Areas Small scale power plant modules: - use of low- to mediumgeothermal resources from shallow (hydrothermal) reservoirs - applicable at different geothermal sites - realisation of different plant sizes with modular set-up - Reliable operation - Low maintenance effort Test of a 60 kwel ORC module at the in situ lab

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