Tiefliegende Speicher- und Barrieregesteinskomplexe in Bayern – ein Überblick

In order to meet the challenges of sustainable development the capture and sequestration of CO2 (CCS) is generally accepted as one option for the mitigation of climate change. Within the scope of the project „Information system on geological storage options in Germany” 23 potential reservoir and barrier rock suites of the deeper subsurface in Bavaria have been re-evaluated based on existing data and reports. Focused on the feasibility of CO2-sequestration only areas at a depth of more than 800 m have been investigated in two major basins: the deeper parts of the Franconian Basin and the Molasse Basin. Due to the heterogeneous distribution of borehole data with large areas completely lacking information and, in many cases, insufficient lithological characterisations many formations are described rather cursory. Mapping of the spatial distribution is confined to four examples from the project’s deliverables showing typical and complex situations. Contour maps of strata as well as isopach maps produced within the project’s scope are mentioned. A reasonable regionalisation of porosity and permeability data was not feasible. Competing subsurface uses strongly restricting the utilisation of CO2-sequestration are summarised. Owing to insufficient data available all statements made and summary maps depicted in this report are rather vague even at the 1: 1m. overview scale. Thus, an appraisal of the effective suitability of particular areas for geological storage of CO2 requires additional investigations in detail considering all structural features and the reach of impact of competing subsurface rights.