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:
Dec. 16, 2008
Filed:
Sep. 01, 2006
Patrick Egermann, Rueil Malmaison, FR;
Jean-marc Lombard, Rueil Malmaison, FR;
Pierre Bretonnier, Houilles, FR;
Patrick Egermann, Rueil Malmaison, FR;
Jean-Marc Lombard, Rueil Malmaison, FR;
Pierre Bretonnier, Houilles, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
To perform at least an evaluation of the inlet capillary pressure value of a porous medium. From a displacement experiment on a sample of the medium, a curve of the volume of saturating fluid expelled from the sample as a function of time is drawn. The differential pressure between the inlet face and at least one point located at a distance Li from the inlet face that is greater than the distance between the inlet face and the interface between the two fluids within the sample is then continuously measured as a function of time. At least one motive pressure gradient of the first fluid is thereafter calculated by means of distance Li and of the curve. Finally, at least one value of the inlet capillary pressure is determined by calculating the difference between the differential pressure and the value of the motive pressure gradient of the expelled fluid. The method can be applied notably to production of oil reservoirs for example.