Method and composition to enhance the performance of encapsulated breakers

A system comprising:

• a reacting fluid for breaking chemical bonds in a polymer in a geological formation comprising an encapsulated breaker;
• sodium nitrite in a first solution;
• and
• an ammonium-comprising compound in a second solution,
• wherein the molar ratio of the sodium nitrite to the ammonium-comprising compound ranges from 4:1 to 1:1;
• and
• wherein the sodium nitrite and the ammonium-comprising compound undergo an exothermic reaction producing generated heat upon contact of the first and second solutions in the reacting fluid wherein:
• the generated heat is operable to release the encapsulated breaker from encapsulation within 60 minutes.

A composition comprising:

• a reacting fluid for breaking chemical bonds in a polymer in a geological formation comprising:
• an encapsulated breaker;
• aqueous sodium nitrite;
• and
• an aqueous ammonium-comprising compound,
• wherein the molar ratio of the aqueous sodium nitrite to the aqueous ammonium-comprising compound ranges from 4:1 to 1:1, and
• wherein the aqueous sodium nitrite and the aqueous ammonium-comprising compound undergo an exothermic reaction upon contact in a fractured wellbore in the geological formation producing generated heat wherein:
• the generated heat is operable to release the encapsulated breaker from encapsulation within 60 minutes.