Activator for breaking system in high-temperature fracturing fluids
AssigneeHalliburton Energy Services, Inc.
InventorsChetan Prakash, Ravikant Belakshe, Nurpasha Hipparge
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Abstract
A wellbore treatment fluid comprising: a base fluid; a viscosifier, wherein the viscosifier is a synthetic, cross-linked polymer having a thermal stability greater than 275° F.; a breaker, wherein the breaker decreases the viscosity of the treatment fluid at or above a breaker-activation temperature; and an activator, wherein the activator is a chelate complex, and wherein the activator activates the breaker to reduce the viscosity of the treatment fluid at a temperature less than the breaker-activation temperature. A method of treating a subterranean formation comprising: introducing the treatment fluid into the subterranean formation.
Claims21
A method of treating a subterranean formation comprising:
- introducing a treatment fluid into the subterranean formation, wherein the treatment fluid has a pH less than 7;
- and wherein the treatment fluid comprises:
- (A) a base fluid;
- (B) a viscosifier, wherein the viscosifier is a synthetic, cross-linked polymer having a thermal stability greater than 275° F.;
- (C) a breaker, wherein the breaker decreases the viscosity of the treatment fluid at or above a breaker-activation temperature;
- (D) an activator, wherein the activator is a chelate complex, and wherein the activator activates the breaker to reduce the viscosity of the treatment fluid at a temperature less than the breaker-activation temperature;
- and
- (E) a cross-linking agent used to cross-link the viscosifier.
A wellbore treatment fluid comprising:
- a base fluid;
- a viscosifier, wherein the viscosifier is a synthetic, cross-linked polymer having a thermal stability greater than 275° F.;
- a breaker, wherein the breaker decreases the viscosity of the treatment fluid at or above a breaker-activation temperature;
- an activator, wherein the activator is a chelate complex, and wherein the activator activates the breaker to reduce the viscosity of the treatment fluid at a temperature less than the breaker-activation temperature;
- a cross-linking agent used to cross-link the viscosifier;
- and
- wherein the treatment fluid has pH less than 7.
Dependencies are inferred from the claim text.