Abstract: Systems and methods for using gellable gravel packing fluids that may comprise polysaccharide gelling agents and gel stabilizers to extend the working temperature range for the polysaccharide gelling agents. A method for placing a gravel pack in a subterranean formation comprising: providing a gravel packing fluid in the form of a linear gel and comprising an aqueous base fluid, a polysaccharide gelling agent, a thermal stabilizer, and a gravel; placing the gravel packing fluid into the subterranean formation; and allowing the gravel packing fluid to form a gravel pack in the subterranean formation.

Abstract: Low residue, high salinity fracturing fluids may be produced by hydrating a gelling agent comprising carboxymethyl hydroxypropyl guar (CMHPG) in an aqueous fluid having a total dissolved solids concentration of about 30,000 ppm or greater and a pH of about 5 to about 8; adjusting the pH of the aqueous fluid to about 9 to about 10; and then, adding a zirconate crosslinker to the aqueous fluid to yield a crosslinked-CMHPG.

Abstract: A persulfate compound activated by a strong base is used for low-temperature breaking of fluids viscosified with one or more water-soluble synthetic polymers, wherein the water-soluble synthetic polymers are selected from the group consisting of polyacrylamides, copolymers of polyacrylamide, derivatives of polyacrylamide or of copolymers of polyacrylamide, and any combination thereof. The breaker system can be used in an oilfield or pipeline application where such a synthetic polymer, a multi-chain polysaccharide, or combination thereof may be present in a fluid. It is particularly useful at low temperatures of less than 100° F.

Abstract: A process for chemically removing cured resin product from subterranean formations in case of inappropriate consolidation, plugging of screens or tubing, and equipment damage. A chemical solvent is introduced to a wellbore where a resin has cured. The resin is contacted with the chemical solvent until the resin at least partially dissolves. The dissolved resin is then removed from the wellbore. The process may also be used to remove consolidated packs consisting of cured resin and particulate materials.

Abstract: Low residue, high salinity fracturing fluids may be produced by hydrating a gelling agent comprising carboxymethyl hydroxypropyl guar (CMHPG) in an aqueous fluid having a total dissolved solids concentration of about 30,000 ppm or greater and a pH of about 5 to about 8; adjusting the pH of the aqueous fluid to about 9 to about 10; and then, adding a zirconate crosslinker to the aqueous fluid to yield a crosslinked-CMHPG

Abstract: Methods are provided for chemically removing cured resin product from subterranean formations in case of inappropriate consolidation, plugging of screens or tubing, and equipment damage. A chemical solvent is introduced to a wellbore where a resin has cured. The resin is contacted with the chemical solvent until the resin at least partially dissolves. The dissolved resin is then removed from the wellbore. The disclosed method may also be used to remove consolidated packs consisting of cured resin and particulate materials.

Abstract: A system and process that are a hybrid of distillation and membrane separations offers a highly efficient means of separating a fluid feed mixture into organic, solid, and aqueous components. The distillation section is followed by two membrane separation sections operated in parallel, with the distillation section separating the feed mixture into an organics-rich fraction and an organics-depleted and solids-rich fraction. One membrane section operates on the organics-rich fraction and separates it into a more organics-rich sub-fraction and a water-rich, organics-depleted sub-fraction, while the other membrane section operates on the organics-depleted, solids-rich fraction from the distillation section and separates it into a solids-rich sub-fraction and a solids-depleted, water-rich sub-fraction.

Abstract: A system and process that are a hybrid of distillation and membrane separations offers a highly efficient means of separating a fluid feed mixture into organic, solid, and aqueous components. The distillation section is followed by two membrane separation sections operated in parallel, with the distillation section separating the feed mixture into an organics-rich fraction and an organics-depleted and solids-rich fraction. One membrane section operates on the organics-rich fraction and separates it into a more organics-rich sub-fraction and a water-rich, organics-depleted sub-fraction, while the other membrane section operates on the organics-depleted, solids-rich fraction from the distillation section and separates it into a solids-rich sub-fraction and a solids-depleted, water-rich sub-fraction.

Abstract: A system and process that are a hybrid of distillation and membrane separations offers a highly efficient means of separating a fluid feed mixture into organic, solid, and aqueous components. The distillation section is followed by two membrane separation sections operated in parallel, with the distillation section separating the feed mixture into an organics-rich fraction and an organics-depleted and solids-rich fraction. One membrane section operates on the organics-rich fraction and separates it into a more organics-rich sub-fraction and a water-rich, organics-depleted sub-fraction, while the other membrane section operates on the organics-depleted, solids-rich fraction from the distillation section and separates it into a solids-rich sub-fraction and a solids-depleted, water-rich sub-fraction.