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:
Oct. 21, 1986
Filed:
Sep. 03, 1985
Alfred Brown, Houston, TX (US);
Texaco Inc., White Plains, NY (US);
Abstract
A method for recovering petroleum from a subterranean petroleum formation penetrated by at least one well in fluid communication with the formation, by a cyclic carbon dioxide injection procedure comprising injecting carbon dioxide into the well followed by a soak period, followed by a production of oil from the formation, wherein the improvement comprises introducing a predetermined quantity of hydrocarbon such as high API gravity crude oil, naphtha, kerosene, gasoline or aromatic solvent which will remain liquid at the temperature of the formation into the formation immediately after introducing the carbon dioxide slug and before the soak and production steps, to dissolve high molecular weight fraction of the crude oil left in the flow channels of the formation, which are recovered from the formation in the production phase. The volume of solvent use is sufficient to fill the well and saturate the formation for a distance of from 4 to 10 feet into the formation.