Treating fines-containing earthen formations

Details Treating fines-containing earthen formations Treating fines-containing earthen formations

E - Fixed Constructions

21

B

31/30

E21B 43/24 (2006.01) C09K 8/592 (2006.01) C09K 8/84 (2006.01)

Patent

CA 1232126

ABSTRACT OF THE DISCLOSURE Method for treating earthen formations which contain water-sensitive, finely divided particulate matter wherein there is injected into the formation steam or a mixture of steam and hot water containing an effective fines-stabilizing amount of a compound containing ammoniacal nitrogen selected from the group consisting of ammonium hydroxide, and a water- soluble ammonia or ammonium ion precursor selected from the group consisting of amides of carbamic acid and thiocarbamic acid, derivatives of such amides, tertiary carboxylic acid amides and their substituted and alkylated derivatives. A preferred additive is urea. If the formation is a subsurface oil-containing formation, the treatment can be part of a method for enhanced oil recovery.

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