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:
May. 15, 2001
Filed:
Oct. 14, 1999
Applicant:
Inventors:
Tawfik Noaman Nasr, Edmonton, CA;
Ezra Eddy Isaacs, Edmonton, CA;
Assignee:
Alberta Oil Sands Technology and Research Authority, Calgary, US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 4/324 ;
U.S. Cl.
CPC ...
E21B 4/324 ;
Abstract
A method for producing hydrocarbons from a subterranean formation comprises injecting steam and an additive into the formation. The additive has at least one nonaqueous fluid, which is selected so that the evaporation temperature of the additive is within about ±150° C. of the steam temperature at the operating pressure. Suitable additives include C,to C,hydrocarbons, and combinations thereof. At least a portion of the additive condenses in the formation. The mobility of the hydrocarbons is greater than that obtained using steam alone under substantially similar formation conditions.