The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 1992
Filed:
Jan. 28, 1991
Samuel H Collins, DeSoto, TX (US);
R Michael Davis, North Richland Hills, TX (US);
Ben F Marek, Coppell, TX (US);
Mobil Oil Corporation, Fairfax, VA (US);
Abstract
A water-saturated core sample of a porous rock is placed in a sleeve which a hydrophobic membrane in one end and a hydrophilic membrane in a second end. A pressurized hydrocarbon is injected into the core sample through the hydrophobic membrane to displace the water in the core sample whereby it drains through the hydrophilic membrane into a collector. Upon a depressurization of the injected hydrocarbon below the displacement pressure of the hydrophilic membrane, the water imbibes back into the core sample through the hydrophilic membrane. Upon a pressurization of the imbibing water above atmospheric pressure the water displaces the hydrocarbon from the core sample through the hydrophobic membrane.