1. GFZ experience in reservoir development

2. Operations at the site Groß Schönebeck  2000 reopening of a abbandoned gas well  2001 primary hydraulic test for determination of initial parameters  2002 stimulation of Rotliegend sandstones in packer-isolated test intervals with high-viscous fluids (polymers) and proppants  2002 pumping tests producing 700 m 3 of formation fluid (46 days)  2003 open-hole stimulation (water-frac) in Rotliegend rocks  2004/05long term production test  2005start of drilling the new well

3. Planned operations  2005/06 completion of the well (4500 md)  2006 communication experiment, including tracer test  2007 power plant in cooperation with industry

4. Exploration  More than 300 km of reprocessed seismic data  The I-GET project, comprising -Long seismic profiles with 3-component geophones -MT profiles parallel to seismic lines -=> integrated interpretation, joint inversion -Hydaulic and thermal modelling, 3D modelling  Rock Physics: Laboratory determination of physical properties at in-situ conditions (permeability, pore pressure, fluid chemistry, el. resistivity, seismic velocities)

5. ENGINE Workshop Definig, Exploring, Imaging and Assessing Reservoirs for Potential Heat Exchange Potsdam, 27./28. April 2006