Responsive interpenetrating network gel particles for preventing CO2 gas channeling of compact oil reservoirs and preparation method thereof

The invention discloses a responsive interpenetrating network gel particle for preventing CO2 gas channeling of compact oil reservoirs and preparation method thereof. The gel particle is prepared from, in percentage by mass, 15 to 25 percent of acrylamide monomer, 0 to 5 percent of temperature-resistant and salt-resistant monomer, 3 to 6 percent of a CO2 responsive monomer; and a cross-linking agent, an initiator I, an initiator II and water. Gel particles are prepared from acrylamide and a temperature-resistant and salt-resistant monomer, and the prepared gel particles, a CO2 response monomerand the gel particles are dissolved in water and react for a period of time to obtain the temperature-resistant and salt-resistant hydrogel. According to the invention, the cross-linking density of the particles in unit volume is increased by the interpenetrating network structure, so that the strength of the particles is increased; after the CO2 responsive interpenetrating polymer network gel particle is in contact with