Establishing a Large Scale Velocity Model for the Geological 3D Modeling of the Deep Subsurface of Schleswig-Holstein (Northern Germany) - A Part of the Joint Project TUNB
Abstract
In the joint project 'Subsurface Potentials for Storage and Economic Use in the North German Basin' (German acronym: TUNB) the Geological Surveys of Northern Germany and the Federal Institute for Geosciences and Natural Resources (BGR) develop a national coherent geological 3D-model of the deep subsurface of the North German Basin.
This large-scale 3D-model is based on the Tectonic Atlas of Northwest Germany and the German North Sea Sector (GTA, Baldschuhn et al., 2001), and the Geophysical Map Series of the former German Democratic Republic (GPK, Reinhardt et al., 1991). The project aims to achieve cross-border consistency and integrates the regional federal state models into a larger and coherent overall 3D model of the subsurface. The Geological Survey SH has developed a geological 3D model of the onshore part of Schleswig-Holstein; major base surfaces are present in Paleozoic to Quaternary strata and are as old as the Permian Zechstein. Additionally the model includes enveloping surfaces of salt diapirs and fault traces. The dataset of the GTA as well as further developments of the model are primarily based on well data and seismic surveys from oil and gas exploration. Jaritz et al. (1991) used checkshot data and sonic logs to develop a velocity model that links the GTA maps in the depth domain to the seismic data in the time domain. Based on original documents we were able to successfully reconstruct the initial velocity model used and perform depth-to-time conversions. The GTA maps converted generally agree with seismic reflectors however, structural complex areas are characterized by minor inconsistencies. Integrating seismic processing velocities into Jaritz's velocity model will increase the accuracy of the velocity model and help to verify former GTA interpretations.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMNS23B0846D
- Keywords:
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- 0920 Gravity methods;
- EXPLORATION GEOPHYSICS;
- 0925 Magnetic and electrical methods;
- EXPLORATION GEOPHYSICS;
- 0935 Seismic methods;
- EXPLORATION GEOPHYSICS;
- 0999 General or miscellaneous;
- EXPLORATION GEOPHYSICS