Patent ID: 7567079

Claim:
A method suitable for at least enabling the measurement of a property of a porous rock, the method comprising the steps of: (a) providing a porous rock core having a length, an inlet face, and an outlet face; (b) saturating the porous rock core with a first fluid; (c) displacing the first fluid by applying a second fluid to the inlet face of the porous rock core; (d) washing the outlet face of the porous rock core with said second fluid so as to maintain an outflow boundary condition; (e) determining that a substantially steady-state condition has been reached where the fluid saturation distribution and pressure distribution along the length of the core do not substantially change with time; (f) performing a fluid saturation distribution measurement of the porous rock core comprising the act of: measuring the local fluid saturation using Nuclear Magnetic Resonance Imaging (NMR) wherein a single exponential free induction decay (FID) rate 1/T 2 * is used to provide an NMR linewidth Δν is substantially equal to 1/πT 2 *; (g) performing a pressure distribution measurement of the porous rock core; and (h) determining a property of the porous rock core by using fluid saturation measurement.