The characterization of fluid flow in low permeability porous materials remains a challenge nowadays. Low permeability media may classically include materials with a permeability lower than about 0.1 mD. Different areas are concerned among them geological sciences (cap rocks like clays, shales and salt rocks, tight reservoir rocks, volcanic, crystalline and metamorphic rocks), material sciences (synthetic porous materials such as concrete and glass, in particular when used for confining radioactive waste) and biological sciences (bones for example).
Several laboratories worldwide will measure the permeability of a single low permeability material selected for the benchmarking, using their preferred technique. A range of different methods will be covered by the benchmark:
Expected outcomes of the benchmark: