Methods and systems for stimulating a subterranean formation containing a carbonate mineral
AssigneeHalliburton Energy Services, Inc.
InventorsEnrique A. Reyes, Aaron M. Beuterbaugh, Alyssa Lynn LaBlanc
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Abstract
Chelating agents may be used to mitigate the presence of metal ions in a subterranean formation, thereby decreasing the likelihood of the metal ions forming damaging insoluble compounds within the subterranean formation. Methods for treating a subterranean formation can comprise: providing a treatment fluid comprising an aqueous carrier fluid and a chelating agent comprising hydroxyiminodisuccinic acid or any salt thereof; introducing the treatment fluid into a subterranean formation comprising a carbonate mineral; and complexing a metal ion in the subterranean formation with the chelating agent.
Claims12
A method comprising:
- providing a treatment fluid comprising an aqueous carrier fluid, a chelating agent comprising hydroxyiminodisuccinic acid or any salt thereof, and hydrochloric acid;
- wherein the treatment fluid is free of both hydrofluoric acid and a hydrofluoric acid generating compound,
- introducing the treatment fluid into a subterranean formation comprising a carbonate mineral;
- and
- complexing a metal ion in the subterranean formation with the chelating agent,
- wherein the treatment fluid has a pH of about 1 or lower,
- wherein the chelating agent is present in an amount effective to decrease a rate of dissolution of the carbonate mineral,
- wherein the hydrochloric acid reacts with the carbonate mineral to liberate the metal ion therefrom.
A method comprising:
- providing a treatment fluid comprising an aqueous carrier fluid, chelating agent comprising an alkali metal salt of hydroxyiminodisuccinic acid, and hydrochloric acid;
- wherein the treatment fluid is free of both hydrofluoric acid and a hydrofluoric acid generating compound,
- wherein the treatment fluid has a pH of about 1 or lower;
- introducing the treatment fluid into a subterranean formation comprising a matrix of a carbonate mineral;
- dissolving at least a portion of the carbonate mineral with an acid to produce a metal ion;
- and
- complexing the metal ion with the chelating agent,
- wherein the chelating agent is present in an amount effective to decrease a rate of dissolution of the carbonate mineral,
- wherein the hydrochloric acid reacts with the carbonate mineral to liberate the metal ion therefrom.
A system comprising:
- a pump fluidly coupled to a tubular, the tubular containing a treatment fluid comprising an aqueous carrier fluid, hydrochloric acid or a hydrochloric acid generating compound, and a chelating agent comprising hydroxyiminodisuccinic acid or any salt thereof;
- wherein the treatment fluid is free of both hydrofluoric acid and a hydrofluoric acid generating compound,
- wherein the treatment fluid has a pH of about 1 or lower, and
- wherein the tubular extends into a subterranean formation comprising a carbonate mineral,
- wherein the chelating agent is present in an amount effective to decrease a rate of dissolution of the carbonate mineral,
- wherein the hydrochloric acid reacts with the carbonate mineral to liberate the metal ion therefrom.
Dependencies are inferred from the claim text.