Back to results
US 7,464,754 B1Granted
CO2 foamed well treatments
AssigneeTeam CO2, Inc.
InventorsRandal L. Decker, Michael D. Hyman, John J. Ridge
Life of this patent
Estimating the term…
Abstract
A composition and a method for treating a subterranean formation with an injection liquid containing liquid carbon dioxide, a treating liquid and optionally a foaming agent and/or methanol. The treating liquid may be an acid, a corrosion inhibitor, a solvent or a scale inhibitor.
Claims11
A method for treating a subterranean formation penetrated from an earth surface by at least one well, the method consisting essentially of:
- a) blending a treating liquid and liquid carbon dioxide to produce an injection liquid containing from about 51 to about 95 weight percent liquid carbon dioxide and from about 5 to about 49 weight percent treating liquid;
- b) injecting the injection liquid into the subterranean formation through the at least one well at a pressure below fracturing pressure in an amount sufficient to treat a desired pore volume of the formation around the at least one well;
- and,
- c) shutting in the well for at least one hour.
1 more element
Dependencies are inferred from the claim text.