Patent ID: 6903054

Claim:
A reservoir treatment fluid for use in a hydrocarbon-containing formation comprising: a self-diverting acid, wherein the self diverting acid comprises: about 1% to 30% by weight of at least one acid selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, citric acid, maleic acid, hydrofluoric acid and mixtures thereof; and about 1% to 20% by volume of at least one viscoelastic surfactant selected from a family of compounds described by where R 3 contains at least 10 carbon atoms, p=1-6, R 2 contains 1-6 carbon atoms and R 1 contains 1-6 carbon atoms; and about 0.7% to 20% by weight scale inhibitor, said fluid not comprising a member selected from the group consisting of co-surfactants and chelating agents.