| CPC C09K 8/508 (2013.01) [C09K 8/5045 (2013.01); C09K 2208/28 (2013.01); C09K 2208/30 (2013.01)] | 19 Claims |
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1. A method to prevent a suspended chemical from reacting with free water, the method comprising:
providing a mixture of a brine and a viscoelastic surfactant, wherein the brine comprises water and at least one saturation salt, and wherein the water is saturated with the at least one saturation salt at a first temperature, and wherein the at least one saturation salt consisting of one or more first salts wherein each first salt has a Ksp value, the highest of which is a first Ksp value; and
adding one or more salt crystals to the mixture, wherein the one or more salt crystals are comprised primarily from at least one crystalized salt to the mixture so as to produce a temperature-stabilized carrier-fluid system, wherein the at least one crystalized salt consists of one or more second salts wherein the Ksp value of each second salt is higher than the first Ksp value,
adding the suspended chemical to the temperature-stabilized carrier-fluid system so as to produce a well treatment fluid, wherein the suspended chemical reacts with free water when present in the brine, and
wherein, at temperatures greater than the first temperature, a first portion of the salt crystals dissolves into the brine to bind water and thus prevent free water in the well treatment fluid so as to prevent the suspended chemical from reacting with free water, and wherein the salt crystals are present in an amount such that at least a second portion of the salt crystals remains in crystal form prior to introduction of the well treatment fluid to a wellbore or subterranean formation.
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