As received or extracted intact sample analysis for gas permeability (ability to flow a fluid at a given rate over time). Ambient or stressed conditions up to 10k psi overpressure.
Can be performed on intact or crushed rock volume. Ideally a minimum of 50-60 grams per sample. If seeking to execute entire workflow design ~120 grams of starting intact material is required. Exception is SS permeameter. Only intact analysis applies.