Patent ID: 7678742

Claim:
A method comprising: providing a drill-in fluid that comprises an aqueous base fluid, a viscosifier, a degradable bridging agent comprising a degradable material capable of undergoing an irreversible degradation downhole, and a relative permeability modifier fluid loss control additive, wherein the relative permeability modifier fluid loss control additive comprises a water-soluble hydrophobically modified polymer comprising a reaction product of a hydrophilic polymer and a hydrophobic compound, wherein the mole ratio of the hydrophilic polymer to the hydrophobic compound is in the range of from about 99.98:0.02 to about 90:10; placing the drill-in fluid in a subterranean formation; and allowing the relative permeability modifier fluid loss control additive to reduce fluid loss from the drill-in fluid to the subterranean formation.