Patent ID: 7482310

Claim:
A method of treating a subterranean formation penetrated by a well bore comprising: (a) preparing a fracturing fluid containing a mixture resulting from: (I) providing a water-in-oil emulsion composition comprising: (i) 5% to 99% by weight of a water-in-oil emulsion comprising: (1) 10% to 90% by weight of a hydrophobic oil phase; (2) 0.5% to 10% by weight of a surfactant system; and (3) 5% to 90% by weight of a polymer-containing aqueous phase comprising water and a polymer or copolymer containing repeat units from an acrylamide monomer, wherein the polymer or copolymer comprises from 2% by weight to 89.5% by weight of the water-in-oil emulsion; (ii) 0.5% to 90% by weight of a carrier solvent; and (iii) 0 to 90% by weight of a fluidizing agent; and adding (iv) 0.1% to 10% by weight of one or more inorganic microparticles, where the total of all components is 100% by weight; and (II) adding the water-in-oil emulsion composition to water; and (b) contacting the subterranean formation with the fracturing fluid.