A benchmark study on problems related to CO₂ storage in geologic formations: SSummary and discussion of the results

This paper summarises the results of a benchmark study that compares a number of mathematical and numerical models applied to specific problems in the context of carbon dioxide (CO₂) storage in geologic formations. The processes modelled comprise advective multi-phase flow, compositional effects due to dissolution of CO₂ into the ambient brine and non-isothermal effects due to temperature gradients and the Joule-Thompson effect. The problems deal with leakage through a leaky well, methane recovery enhanced by CO ₂ injection and a reservoir-scale injection scenario into a heterogeneous formation. We give a description of the benchmark problems then briefly introduce the participating codes and finally present and discuss the results of the benchmark study.