▎ 摘　　要

NOVELTY - Water-soluble nanomaterial, is obtained by grafting a viscosity reducing monomer, a hydrophilic monomer and an active monomer on a double bond modified nano material, where the double bond modified nano material includes at least one of double bond modified nano silicon dioxide, double bond modified nano montmorillonite, and double bond modified nano graphene oxide, the viscosity reducing monomer is sodium alpha -olefin sulfonate, the hydrophilic monomer includes at least one of acrylamide monomers, acrylic monomers, and acid anhydride monomers, and the reactive monomer is a water-soluble monomer containing a C12-C18 long-chain alkyl group. USE - The water-soluble nanomaterial is used as a thick oil viscosity reducing and oil-displacing agent (claimed). ADVANTAGE - The water-soluble nano material retains the good temperature resistance of the nano material, good viscosity reduction effect and an excellent ability to reduce the interfacial tension, rigidity of nanomaterials can improve the temperature resistance, and rely on the small size effect of nanomaterials to graft a large number of active groups to improve its interfacial activity and emulsification ability, so as to achieve the purpose of reducing the viscosity of thick oil.