US 11,952,533 B2 · Filter cake removal compositions and methods of making and using same

Abstract

A breaker composition comprising (i) an acid precursor, (ii) an accelerating agent wherein the accelerating agent comprises a Lewis acid and (iii) an aqueous fluid wherein the effective operating temperature of the breaker composition ranges from about 15° C. to about 120° C. A wellbore servicing system comprising (a) an aqueous-based drilling fluid, wherein the aqueous-based drilling fluid forms water-wet solids in the wellbore; and (b) a breaker composition comprising (i) an acid, (ii) an accelerating agent and (iii) an aqueous fluid. A method of dissolving a filtercake comprising contacting the filtercake with a breaker solution comprising (i) an acid precursor, (ii) an accelerating agent and (iii) an aqueous fluid wherein the filtercake comprises calcium carbonate.

Claims20

Dependent claims

A method of dissolving a filtercake within a wellbore comprising:

introducing to a wellbore a breaker solution comprising (i) an acid precursor, (ii) an accelerating agent wherein the accelerating agent comprises ZnSO4, or a hydrates thereof, and (iii) an aqueous fluid;
and
contacting the filtercake with the breaker solution,
wherein contacting occurs in the wellbore at a temperature ranging from about 15° C. to about 120° C.;
wherein the filtercake comprises calcium carbonate and wherein a rate of acid precursor hydrolysis is increased by from about 5 times to about 30 times the rate of acid precursor hydrolysis observed in the absence of an accelerating agent.

2 more elements

Dependencies are inferred from the claim text.

Filter cake removal compositions and methods of making and using same

Life of this patent

Filter cake removal compositions and methods of making and using same

Life of this patent

Abstract

Claims20