Diffluent salt tackifying amphiphilic polymer oil-displacing agent and preparation method thereof

The invention belongs to the field of preparation of high-salinity oil reservoir oil-displacing agent and particularly relates to a diffluent salt tackifying amphiphilic polymer oil-displacing agent and a preparation method thereof. The diffluent salt tackifying amphiphilic polymer oil-displacing agent is prepared through copolymerization reaction by taking acrylamide and N-methyl-N-ally lauryl sultone as polymerization monomers with existence of initiator. The diffluent salt tackifying amphiphilic polymer oil-displacing agent synthesizes hydrophobic monomers and betaine monomers into one associated monomers, and through the powerful hydration capacity of betaine groups and the dissolution capacity of hydrophobic groups, overcomes the problems of low content of hydrophobic monomers and long dissolution time of existing oil-displacing agents. In the prior art, ternary compolymerized salt tackifying amphiphilic polymers are relatively poor in water solubility and have a dissolution timelonger than 300 min, whil