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The Rotliegend of the German North Sea as a potential target formation for CCS?

The Rotliegend is one of the most important target horizons for Oil and Gas production in the Netherlands as well as Lower Saxony. Therefore, these horizons have also been explored in the German North Sea, but the exploration often revealed either no gas potential or a high enrichment with N2. Despite this, good porosities and permeabilities of partially thick sandstones in the basal sequences of the Rotliegend were frequently found. Due to these factors and the very thick seal units of the Upper Rotliegend and the Zechstein, these sandstone sequences are becoming increasingly interesting for CO2 storage. Although the Rotliegend units have been of economic interest in recent decades, the German part of the North Sea has been underexplored in this regard, and very little has been published. Therefore, the BGR is re-investigating these storage and barrier formations on a regional scale based on wells and reflection seismic data, and will evaluate the static storage potential of this formation in the future. The mapping study presented here was carried out as part of the GEOMARE joint project GEOSTOR and in the context of BGR's long-term tasks defined by the national Carbon Dioxide Storage Act (KSpG). We present log correlation work, exemplary seismic interpretations, and discuss the uncertainties of our mapping study.

Details

Author
Fabian Jähne-Klingberg1, Hauke Thöle1
Institutionen
1Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Germany
Veranstaltung
GeoSaxonia 2024
Datum
2024
DOI
10.48380/cp1s-2339
Geolocation
German North Sea