Validation of the Coupled Simulator OpenGeoSys-Eclipse

This paper presents the verification by benchmarking and code comparison of a coupled multi-phase and reactive transport simulator for CO2 storage simulations. Benchmarks of increasing complexity, dimensionality and process coverage are investigated. Differences in the results obtained with different simulators can in the case of multi-phase flow be assigned to the different mathematical and numerical methods used, in the case of geochemical reactions the underlying data base additionally influences the results significantly. This work thus stresses the importance of a consistent code verification for the complex numerical models required for assessing CO2 storage long term effects and risks.