Within the project phase RissDom-A, detailed seismic investigations of the geological structural elements of the magmatic and sedimentary target horizons, planning of a well with optimized design, and laboratory measurements of hydraulic properties of artificial fractures are carried out. Based on the results, decisions on the future development of the Geothermal Research Platform Groß Schönebeck in a follow-up project phase will be made. Currently, drilling of a new well and hydraulic stimulation treatments are seen as a possibility to investigate the sustainable utilization of the deep geothermal reservoir at this research site as an example for the North-German Basin (RissDom-B). Prior to this, the following questions are addressed in RissDom-A:
Based on results of previous projects at the research site Groß Schönebeck, interpretation of existing data (drill cores, thermophysical fluid properties), and a new combined seismic survey, geological structural elements and their subsurface distribution are identified and characterized within RissDom-A. Besides a 3D surface seismic survey, which is carried out in cooperation with Section 2.7 Near-surface Geophysics, vertical seismic profiling (VSP) is performed in the existing boreholes using the innovative method of fiber-optic distributed acoustic sensing (DAS). The hydraulic properties of artificial fractures under variable stress conditions are investigated on samples from analogue material of the geothermal reservoir.