Imbibition oil displacement agent and preparation method thereof

The invention provides an imbibition oil-displacing agent and a preparation method thereof, the imbibition oil-displacing agent comprises a high-molecular polymerization emulsion and a surfactant solution, and the mass ratio of the surfactant solution to the high-molecular polymerization emulsion is (1.5-9): 1, wherein the high-molecular polymerization emulsion is prepared from the following raw materials: a water-soluble polymer monomer, an emulsifier and an initiator; the surfactant solution comprises a nonionic surfactant and a solvent. Compared with the prior art, the imbibition oil-displacing agent has the beneficial effects that the water-soluble high-molecular polymer emulsion with surface activity is mixed with the surfactant solution, and the nonionic surfactant component in the surfactant solution is loaded on a water-soluble high-molecular polymer skeleton so that the effect of the whole system in a high-salt environment can be ensured, and the mixing ratio of the two is proper so that the oil disp