Measurement of aperture distribution, capillary pressure, relative permeability, and in situ saturation in a rock fracture using computed tomography scanning

We develop an experimental technique that uses computed tomography (CT) scanning to provide high‐resolution measurements of aperture distribution and in situ saturation along with capillary pressure and relative permeability for the same rough‐walled fracture. We apply this technique to an induced fracture in a cylindrical basalt core undergoing water drainage. We find that the sum of the water and gas relative permeabilities is much