Process for evaluating physical parameters of a subterranean reservoir starting from rock debris taken from said reservoir

摘要

Physical properties of an underground deposit are evaluated from fragments taken from it. The fragments are immersed in a viscous fluid in a container and further fluid injected in two stages each followed by a relaxation period. The change of pressure throughout is measured. A model of such a pressure change for chosen values of the physical properties is iteratively changed until the pressure change matches the measured change. An Independent claim is included for an apparatus for performing as above. Preferred Features: The fragments are borehole cuttings preferably from which cutting fluid has been removed. The fluid is a high viscosity oil. The property is absolute permeability.