Method of improving the permeability of an underground...

Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component

Reexamination Certificate

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Details

C507S211000, C507S244000, C507S246000, C507S261000, C166S270000, C166S270100, C166S311000

Reexamination Certificate

active

06972274

ABSTRACT:
The present invention generally relates to a method and a composition useful in restoring the permeability of a porous underground petroleum containing formation. Restoring permeability to the formation enhances the injectivity thereby accelerating petroleum recovery. The method of the invention comprises treating said formation with a composition which comprises a combination of at least one nonionic compound, preferably an alkoxylated alcohol, with at least one cationic compound, preferably a quaternary ammonium compound, in an amount effective to improve the permeability of the formation. The composition may also optionally contain an alkyl glycoside.

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