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US 2026/0071114 A1Published application
Single-phase retarded acid based on a cationic surfactant
AssigneeSchlumberger Technology Corporation
InventorsSamuel Danican, Haiyan Zhao, Patrice Abivin
Life of this patent
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Abstract
Compositions for matrix acidizing and fracture acidizing contain water, an acid, and an acid retarding agent including an alkyl dimethyl benzyl ammonium chloride surfactant. The composition may be prepared and injected into a wellbore penetrating a subterranean formation.
Claims19
A composition, comprising:
- water;
- an acid;
- and
- an acid retarding agent comprising an alkyl dimethyl benzyl ammonium chloride.
1 more element
A method, comprising:
- preparing a composition comprising water, an acid and an acid retarding agent comprising an alkyl dimethyl benzyl ammonium chloride, wherein the alkyl dimethyl benzyl ammonium chloride comprises about 40% C12, about 50% C14, and about 10% C16;
- and
- injecting the composition into a wellbore penetrating a carbonate subterranean formation, wherein the temperature of the carbonate subterranean formation is greater than or equal to 160° F.
A method, comprising:
- preparing a composition comprising water, an acid and an acid retarding agent comprising an alkyl dimethyl benzyl ammonium chloride, wherein the alkyl dimethyl benzyl ammonium chloride comprises about 14% C12, about 58% C14, and about 28% C16;
- and
- injecting the composition into a wellbore penetrating a carbonate subterranean formation, wherein the temperature of the carbonate subterranean formation is greater than or equal to 160° F.
Dependencies are inferred from the claim text.