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:
Jun. 02, 1998
Filed:
Jun. 10, 1996
Jean-Claude Moulu, Aubergenville, FR;
Francedilla.ois Kalaydjian, Rueil-Malmaison, FR;
Christian Deruyter, Rueil-Malmaison, FR;
Institut Francais du Petrole, Rueil Malmaison, FR;
Abstract
The method according to the invention is aimed at increasing the efficiency of the conventional enhanced petroleum fluid (O) recovery method (WAG) in an underground reservoir, according to which displacement is achieved towards production wells by means of alternate injections of water slugs (W) and of gas slugs (G) into one or more injection wells. It is characterized in that a substance (alcohol for example) allowing the spreading coefficient (S) to be made negative is added to one or more water slugs. The proportion to be added is selected as a function of the pressure and temperature conditions of the reservoir to be swept. The petroleum fluid to be displaced is distributed in the form of meniscuses that reduce the mobility of the gas and improve the sweep capacity thereof. The method allows to better control the input profile, and a greater and therefore more efficient injection pressure can be used. The method can be used in the field of enhanced oil recovery.