Facies Differentiation of the Malm by Interpretation of Reflection Seismic Profiles and a Moving Source VSP Experiment
- Key words
- Geothermal energy, reflection seismics, temperature, Malm (Upper Jurassic), Southern German Molasse Basin, vertical seismic profiling (VSP)
- Location
- Unterhaching, Germany
- Conference
- European Geothermal Conference
- Year
- 2007
- Language
- English
- Paper number
- 275
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Abstract
A geothermal power plant projected in Unterhaching, south of Munich/Germany, will generate 3.36 MW of electrical power. Two boreholes (doublet) have developed the karstified Malm at a depth of approx. 3000 m. Available seismic profiles were reprocessed with the aim of interpreting the facies and thus the degree of karstification within the Malm. The most prospective areas are, beside fault zones, those where diffractions (indicators for reef facies and karstification) occur together with low velocities (indicators for large amount of water). As a result of these investigations, a deviation of the first (production) well was recommended. Further on both the location and the deviation of the second (injection) borehole were specified. Both boreholes were successful. A vertical seismic profile (VSP) and a moving source VSP were carried out for detailed exploration of the vicinity of the production borehole.
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