Thermally stable, substantially water-free well fluid

A thermally stable, substantially water-free well fluid comprising:

• a polymer;
• a glycol compound comprising at least one selected from diethylene glycol methylether, diethylene glycol ethylether, triethylene glycol methylether, and triethylene glycol ethylether;
• and a salt, wherein the polymer comprises at least one selected from the group consisting of hydroxyethyl cellulose, derivatized cellulose, starch, derivatized starch, whelan gum, whelan gum derivatives, scleroglucan, scleroglucan derivatives, guar gum, guar derivatives, xanthan gum and xanthan gum derivatives.

A method of treating a well comprising:

• injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a viscosifying polymer, a glycol compound comprising at least one selected from diethylene glycol methylether, diethylene glycol ethylether, triethylene glycol methylether, and triethylene glycol ethylether, and a salt.

A method of treating a well comprising:

• injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a polymer, a glycol compound comprising at least one selected from diethylene glycol methylether, diethylene glycol ethylether, triethylene glycol methylether, and triethylene glycol ethylether, and a salt, wherein the polymer comprises at least one selected from the group consisting of hydroxyethyl cellulose, derivatized cellulose, starch, derivatized starch, whelan gum, whelan gum derivatives, scleroglucan, scleroglucan derivatives, guar gum, guar derivatives, xanthan gum and xanthan gum derivatives.

A method of treating a well comprising:

• injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a viscosifying polymer, an alcohol compound comprising glyceroethoxylate, and a salt.

A method of treating a well comprising:

• injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a polymer, a glycol compound comprising at least one selected from diethylene glycol methylether, diethylene glycol ethylether, triethylene glycol methylether, and triethylene glycol ethylether, and a salt, wherein the polymer comprises at least one selected from the group consisting of poly(ethylene glycol), poly(diallyl amine), poly(acrylamide), poly(aminomethylpropylsulfonate), poly(acrylonitrile), poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl amine), poly(vinyl sulfonate), poly(styryl sulfonate), poly(acrylate), poly(methyl acrylate), poly(methacrylate), poly(methyl methacrylate), poly(vinylpyrrolidone), poly(vinyl lactam), co-, ter-, and quater-polymers of the following monomers:
• ethylene, butadiene, isoprene, styrene, divinylbenzene, divinyl amine, 1,4-pentadiene-3-one (divinyl ketone), 1,6-heptadiene-4-one (diallyl ketone), diallyl amine, ethylene glycol, acrylamide, poly(aminomethylpropylsulfonate), acrylonitrile, vinyl acetate, vinyl alcohol, vinyl amine, vinyl sulfonate, styryl sulfonate, acrylate, methyl acrylate, methacrylate, methyl methacrylate, vinylpyrrolidone, and vinyl lactam.