Abstract: A composition for fracturing a wellbore may include a reacting fluid. The reacting fluid includes an encapsulated breaker, sodium nitrite, and an ammonium-comprising compound. The sodium nitrite and the ammonium-comprising compound undergo an exothermic reaction producing heat operable to release the encapsulated breaker, releasing the breaker that then reduces viscosity in the polymer-comprising fluid. A method for fracturing a wellbore may include injecting into a fractured wellbore a fluid comprising an ammonium-comprising compound and a fluid comprising sodium nitrite. The fractured wellbore has been fractured with a fracturing fluid comprising an encapsulated breaker. Sodium nitrite and the ammonium-comprising compound undergo an exothermic chemical reaction that generates heat to release the encapsulated breaker.

Abstract: A method for removing liquid buildup in gas wells may include introducing a first aqueous solution and a second aqueous solution into the wellbore such that the first aqueous solution and the second aqueous solution may intermix within the wellbore. The first aqueous solution may contain a nitrogen-containing compound and the second aqueous solution may contain a nitrite-containing compound and a foaming agent. The method may further include maintaining the intermixed solution in the wellbore such that gas, heat, and foam may be generated, and removing the excess fluid from the wellbore. Furthermore, the method may include introducing an acid or acid precursor into the wellbore, releasing an acid from the acid precursor into the intermixed solution, and maintaining the acid with the intermixed solution in the wellbore to adjusted the pH of the intermixed solution to less than 7.0.

Abstract: A composition for fracturing a wellbore may include a reacting fluid. The reacting fluid includes an encapsulated breaker, sodium nitrite, and an ammonium-comprising compound. The sodium nitrite and the ammonium-comprising compound undergo an exothermic reaction producing heat operable to release the encapsulated breaker, releasing the breaker that then reduces viscosity in the polymer-comprising fluid. A method for fracturing a wellbore may include injecting into a fractured wellbore a fluid comprising an ammonium-comprising compound and a fluid comprising sodium nitrite. The fractured wellbore has been fractured with a fracturing fluid comprising an encapsulated breaker. Sodium nitrite and the ammonium-comprising compound undergo an exothermic chemical reaction that generates heat to release the encapsulated breaker.