Foamed acidizing fluids, additives and methods of acidizing subterranean zones
AssigneeHalliburton Energy Services, Inc.
InventorsKaren L. King, Jiten Chatterji
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Abstract
The present invention provides environmentally safe foamed acidizing fluids for acidizing subterranean zones, additives for foaming and stabilizing foamed acidizing fluids and methods of acidizing subterranean zones. The foamed acidizing fluids are basically comprised of an aqueous acid solution, sufficient gas to form a foam and an effective amount of an additive for foaming and stabilizing the aqueous acid solution comprised of hydrolyzed keratin.
Claims22
An improved foamed acidizing fluid for acidizing or fracture-acidizing subterranean zones comprising:
- an aqueous acid solution;
- sufficient gas to form a foam;
- and
- an effective amount of an additive for foaming and stabilizing said aqueous acid solution comprised of hydrolyzed keratin.
A method of acidizing or fracture-acidizing a subterranean zone penetrated by a well bore comprising the steps of:
- (a) preparing a foamed acidizing fluid comprised of an aqueous acid solution, sufficient gas to form a foam and an effective amount of an additive for foaming and stabilizing said aqueous acid solution comprised of hydrolyzed keratin;
- and
- (b) contacting said subterranean zone with said foamed acidizing fluid.
Dependencies are inferred from the claim text.