HIGH TEMPERATURE GELLANT FOR VISCOSITY MODIFICATION OF LOW AND HIGH DENSITY BRINES

摘要

In accordance with the present invention, the rheology of an aqueous fluid is modified by a method which comprises adding to said aqueous fluid an amount of a viscoelastic composition sufficient to form a viscoelastic fluid. The viscoelastic composition of the invention comprises a combination of i) at least one alkyl amido quaternary amine, and ii) at least one coadditive that comprises a C<SUB>8-24</SUB> linear alkyl and/or alpha-olefin sulfate and/or sulphonate.