TUNB Velo 2.0: Towards a Regional Seismic Velocity Model for the North German Basin

The TUNB project, conducted from 2014 to 2021, marks an important step in the geological 3D modelling of the North German Basin. Through the collaboration of the State Geological Surveys of the participating federal states and the Federal Institute for Geosciences and Natural Resources, a comprehensive 3D model was created, comprising 13 geological horizons and important structural elements such as faults and salt structures. The model serves as a basis for a wide range of subsurface applications, from CO₂ storage to the final disposal of radioactive materials.

The ongoing follow-up project, TUNB Velo 2.0, builds on this foundation by developing a parameterized, seismic velocity-based volume model. In this project, each participating Geological Survey contributes its own model component using regionally available data, workflows, and modelling strategies. Depending on data availability and local priorities, this includes, for example, stacking velocities, checkshots, and borehole sonic logs. The aim is to enable a more accurate time-to-depth conversion of seismic data and to support improved geometric interpretations of the subsurface on a regional scale.

Now TUNB Velo 2.0 is progressing towards its final phase. This poster presents an overview of the project’s goals and background, summarizes the current status of model development, and outlines the modelling concepts used to integrate velocity information into a geological framework. Detailed contributions on specific methods, datasets, and regional modelling strategies are presented in accompanying talks and posters, and illustrate how the resulting model components may support further geological investigations in the respective regions.