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:
Mar. 10, 1987
Filed:
Jan. 31, 1985
Marc Baviere, Noisy Le Roi, FR;
Jean-Claude Moulu, Aubergenville, FR;
Tibor Paal, Nagykanizsa, HU;
Gyorgy Tiszai, Nagykanizsa, HU;
Gyorgyi Gaal, Nagykanizsa, HU;
Laszlo Schmidt, Szazhalombatta, HU;
Gyula Gesztesi, Budapest, HU;
Institut Francais du Petrole, Rueil-Malmaison, FR;
Magyar Szenhidrogenipari Kutato-Fejleszto Intezet, Szazhalombatta, HU;
Abstract
A process for the enhanced oil recovery in oil reservoirs having a significant cation exchange capacity. A displacement slug is injected into an injection well formed from several successive zones, the solubility in the injection water of the anionic surfactant which it contains being adjusted so as to increase, for compensating the rock-micellar solution interactions, from one zone of the slug to the next considering the order of introducing the different zones of the slug.