Parameterizations and numerical tools for simulation of geological storage options are successfully developed and applied in scenario simulations. Geological storage can provide large capacities and a range of withdrawal rates. Storage choice and dimensioning depends not only on geology but on power grid requirements, power plant configurations, and economics as well. Short term storage: CAES: Longer term storage: H_2 or CH_4 gas, heat. Potential seems large for Germany, due to favorable geological settings, for other countries it may not be sufficient. Subsurface space used by the storage site and the induced effects can be assessed by the newly developed methodology. Conflicts of use can be addressed by comparison of different usage options and a benefit analysis. Geological energy storage can contribute significantly to the energy storage required due to the energy transition in Germany and beyond.
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