Carboxylic acid and oxidizer clean-up compositions and associated methods of use in subterranean applications
AssigneeHalliburton Energy Services, Inc.
InventorsThomas D. Welton, Richard W. Pauls, Jeff T. Fleming
Life of this patent
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Abstract
Methods of reducing the viscosity of a viscosified treatment fluid; providing a clean-up composition comprising a carboxylic acid; a chlorite-based breaker system comprising an alkali metal compound and an activator wherein the activator comprises a metal and an amine. Placing a viscosified treatment fluid in a subterranean formation via a well bore penetrating the subterranean formation; first contacting the viscosified treatment fluid with the chlorite-based breaker; and then contacting the viscosified treatment fluid with the clean-up composition; and, allowing the viscosity of the viscosified treatment fluid to reduce.
Claims19
A method of reducing the viscosity of a viscosified treatment fluid comprising:
- providing a viscosified treatment fluid;
- providing a clean-up composition comprising a carboxylic acid wherein the carboxylic acid comprises a carboxylic acid chosen from the group consisting of:
- isophthalic acid, terephthalic acid, pamoic acid, thapsic acid, valproic acid, and a mixture of two or more of these;
- providing a chlorite-based breaker system comprising an alkali metal compound and an activator;
- and,
- wherein the activator comprises a metal and an amine;
- the metal comprising iron, cobalt, or a combination thereof;
- and,
- the amine selected from the group consisting of tetraethylenepentamine, butyl amine, ethylene diamine, diethylene triamine, and ethylene diamine hydrogen chloride salt;
- placing a viscosified treatment fluid in a subterranean formation via a well bore penetrating the subterranean formation;
- first contacting the viscosified treatment fluid with the chlorite-based breaker
- and then contacting the viscosified treatment fluid with the clean-up composition and,
- allowing the viscosity of the viscosified treatment fluid to reduce.
A method of reducing the viscosity of a viscosified treatment fluid comprising:
- providing a viscosified treatment fluid;
- providing a clean-up composition comprising a carboxylic acid wherein the carboxylic acid comprises a carboxylic acid chosen from the group consisting of:
- isophthalic acid, terephthalic acid, pamoic acid, thapsic acid, valproic acid and a mixture of two or more of these;
- providing a chlorite-based breaker system comprising an alkali metal compound and an activator;
- and,
- wherein the activator comprises a metal and an amine;
- the metal comprising iron, cobalt, or a combination thereof;
- and,
- the amine selected from the group consisting of tetraethylenepentamine, butyl amine, ethylene diamine, diethylene triamine, and ethylene diamine hydrogen chloride salt;
- placing the clean up composition into a portion of a subterranean formation as a pre-pad treatment;
- and then,
- placing the viscosified treatment fluid into the portion of the subterranean formation;
- and then,
- placing the chlorite-based breaker into the portion of the subterranean formation and,
- allowing the viscosity of the viscosified treatment fluid to reduce.
A method of reducing the viscosity of a viscosified treatment fluid comprising:
- providing a clean-up composition comprising a carboxylic acid wherein the carboxylic acid comprises a carboxylic acid chosen from the group consisting of:
- isophthalic acid, terephthalic acid, pamoic acid, thapsic acid, valproic acid, and a mixture of two or more of these;
- providing a chlorite-based breaker system comprising an alkali metal compound and an activator wherein the activator comprises a metal and an amine;
- providing a viscosified treatment fluid;
- placing the viscosified treatment fluid in a subterranean formation via a well bore penetrating the subterranean formation;
- first contacting the viscosified treatment fluid with the chlorite-based breaker;
- and then contacting the viscosified treatment fluid with the clean-up composition;
- and,
- allowing the viscosity of the viscosified treatment fluid to reduce.
Dependencies are inferred from the claim text.