Harmonizing a 3D velocity field between Mecklenburg-Western Pomerania and Brandenburg: Insights from the TUNB velo 2.0 project

As part of the transnational TUNB velo 2.0 initiative, the Geological Surveys of Mecklenburg-Western Pomerania and Brandenburg contribute to the development of a 3D seismic velocity model of the North German Basin. Building on the 3D geological framework established in the predecessor TUNB project, which spans from the Cenozoic to the base of the Zechstein, this new phase involves transforming surface-based models into voxel models parameterized with seismic velocity data.

The seismic velocity data used for model parameterization stem from extensive hydrocarbon exploration campaigns conducted in both federal states between the 1960s and 1990s. Although the primary focus was on deep Permian reservoirs, data were systematically collected for Mesozoic formations as well. The dataset includes a substantial number of check-shot surveys and vertical seismic profiles (VSPs) from over 250 well, regional velocity models, stacking and migration velocities.

In a pilot region in Northwestern Brandenburg (Southwestern Mecklenburg–Western Pomerania) a concept was developed to revitalize the historical data with modern methods and cross-border harmonization was achieved in TUNB velo 2.0 showing promising results for a seamless 3D velocity field.