Back to results
US 12,473,486 B2Granted
Single-phase retarded acid based on a cationic surfactant
AssigneeSchlumberger Technology Corporation
InventorsSamuel Danican, Haiyan Zhao, Patrice Abivin
Life of this patent
Estimating the term…
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.
Claims10
A method, comprising:
- preparing a composition comprising water, an acid and an acid retarding agent comprising an alkyl dimethyl benzyl ammonium chloride, wherein the acid is present at a concentration between 7.5 wt % and 36 wt %, wherein the alkyl dimethyl benzyl ammonium chloride is present at a concentration between 0.1 wt % and 5.0 wt %, and 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.