Patent ID: 8691733

Claim:
A method comprising: providing an invert emulsion fluid comprising: an oil-based continuous phase, an aqueous discontinuous phase, an emulsifier, and a polar hydrophobic additive that comprises a polar hydrophobe, wherein the polar hydrophobe comprises a structure selected from the group consisting of: and any combination thereof; wherein R 1 and R 2 comprise at least partially hydrophobic groups; X comprises an ester group and a hydrophilic group selected from the group consisting of: a halogen, a haloformyl group, an aromatic group, a carbonate group, a hydroperoxy group, a peroxy group, a cyanate group, a nitrate group, a nitrile group, a sulfonyl group, a sulfonate group, a sulfate group, a combination thereof, and a derivative thereof; and C is a carbon atom, wherein the polar hydrophobic additive comprises at least four X groups, wherein the polar hydrophobic additive may substantially increase the yield point, the low-shear yield point, or both of the invert emulsion fluids relative to a fluid without a polar hydrophobic additive while limiting the change in the plastic viscosity to no more than about 35% of the change in the property, yield point or low-shear yield point, with the largest increase; and placing the invert emulsion fluid in a subterranean formation.