Development of a Regional 3D Geological Model in the Bavarian Molasse Basin: A Pilot Study for Integrated Seismic-Well Interpretation and Seismostratigraphic Framework Construction

The increasing demand for reliable geothermal resources highlights the necessity for robust geological models of the deep subsurface. In this context, we present a pilot study aimed at constructing a regional 3D geological model of the Bavarian segment of the North Alpine Foreland Basin (NAFB). This work, conducted under the auspices of the Bavarian Environment Agency (LfU), integrates legacy 2D and 3D seismic data, well logs, and borehole information into a unified geoscientific framework enabled by recent advances in data availability (geological data ect) and modelling infrastructure.

The methodological workflow encompasses seismic reprocessing, log correlation, synthetic seismogram generation, and reflector calibration through seismic-to-well ties. A consistent seismostratigraphic framework is derived by correlating predefined key reflectors and regionally traceable unconformities across heterogeneous lithological domains.

The iterative integration of geophysical and geological datasets enables precise depth-to-time conversion and enhances both structural and stratigraphic resolution. A preliminary velocity model supports time-depth conversion and volumetric parametrization. The approach facilitates the incorporation of external datasets (e.g., geothermal assessments) and promotes standardized modelling practices across institutional and scientific domains.

This pilot application within a defined test area serves to validate internal workflows and model components, ultimately contributing to a comprehensive 3D subsurface framework for future geothermal exploration and reservoir characterization in the Bavarian Molasse Basin.