The invention discloses a viscous-elastic particle oil-displacing agent with a
fluorescence characteristic and a preparation method therefor. The oil-displacing agent is a terpolymer composed of three structural units:
acrylamide, N-
vinyl carbazole and 2-(dimethylamino)ethyl
methacrylate. The preparation method is as follows: 100 parts of
acrylamide is dissolved in 250-290 parts of water to prepare a solution, 0.3-0.5 part of 2-(dimethylamino)ethyl
methacrylate is dissolved in 40-60 parts of water to prepare a solution, 0.0004-0.025 part of N-
vinyl carbazole is dissolved in 0.2-4 parts of
ethanol to prepare a solution, the solutions are added in a three-necked
bottle in order, and the three-necked
bottle is placed in water-bath at a temperature of 15-25 DEG C; after
nitrogen input is carried out for 20min, a solution prepared after 0.015-0.035 part of
potassium peroxodisulfate is dissolved in 20-40 parts of water is added into the three-necked
bottle; when the temperature rise of the reaction solution is more than 1 DEG C,
nitrogen input is stopped, after the reaction is finished, the three-necked bottle is placed in a water bath kettle,
thermal insulation is carried out for 3-5h, then gel is taken out,
cut into pieces, dried, crushed and screened, and a powdery product can be obtained.