Method of measuring capillary pressures

Details Method of measuring capillary pressures Method of measuring capillary pressures

G - Physics

01

L

G01L 7/00 (2006.01) G01N 7/10 (2006.01) G01N 33/24 (2006.01) G01N 15/08 (2006.01)

Patent

CA 2080104

Abstract of the Disclosure A method for rapidly and accurately determining the threshold and critical capillary pressures of a porous rock sample. A fluid saturating the sample, preferably oil, is withdrawn from the downstream end of the sample at an extremely low rate as a result of the introduction of another fluid, preferably gas, at the upstream end. The other fluid displaces the saturating fluid due to a differential pressure between the upstream and downstream ends of the sample. The differential pressure is created by means which does not require use of back pressure valves, thereby avoiding pressure surges and allowing constant slow withdrawal of the saturating fluid. The threshold and critical capillary pressures may be determined from a trace of the differential pressure.

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