3D Geological Model of Potential CO2 Storage: Abandoned Oil and Gas Field LBr-1in the Vienna Basin

Abstract

Successful CO2 storage in abandoned oil and gas fields, building the underground gas storages, and enhanced oil and gas recovery require a functional 3D static geological model of the storage complex with the real geometry and conditions. Abandoned oil and gas field Lanzhot-Brodske North (LBr1) on the territory of the Czech Republic was selected for the preparation of a pilot research project of the geological CO2 storage. It is situated in the Northern part of the Vienna Basin, close to the Czech-Slovak border. The 3D-model includes a separate northern part of the LBr1 field. The 3D model is designed to serve as an input for the dynamic model and makes it possible to experiment and test simulations of the CO2 storage in a more-or-less real geological environment. The model documents areal and vertical extent of the storage complex, geological structure formed by the Lab reservoir horizon, trap seal built by the overlying clays, overlying and adjacent strata, aquifers, faults, natural and artificial migration paths. Further information provided by the model consists of the reservoir volume, pore space, reservoir properties, fluid distribution, and saturation by the pore fluids. A simplified 3D-model of the reservoir overburden offers a basis for risk analysis of potential fluid migration into shallower aquifers.