▎ 摘　　要

NOVELTY - Hydrogel particle comprises 0.1-0.5 pts. wt. polyacrylamide hydrophobically associative polymer, 0.6-1 pts. wt. phenolic resin, and 0.1-0.3 pts. wt. nano material. The polyacrylamide hydrophobically associative polymer and the phenolic resin undergo a cross-linking reaction to form a cross-linked polymer. The nanomaterial is linked to the cross-linked polymer by hydrogen bonding. USE - The hydrogel particle and integrated displacer agent are useful in profile control of oil reservoir (claimed). ADVANTAGE - The hydrogel particle has high gel body strength, high temperature and salt resistance, and can be matched with active system materials to improve water flooding development effects, and to control water and stabilize oil in oil fields. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a method for preparing hydrogel particle, comprising (i) preparing solution containing polyacrylamide hydrophobically associative polymer, phenolic resin, and nanomaterial, and placing at a constant temperature of 70-130degrees Celsius for 12-140 hours to obtain a hydrogel body, and (ii) mixing and shearing the hydrogel body and water, and ultrasonically crushing; (2) an integrated displacer agent, comprising hydrogel particle; and (3) a method for preparing integrated displacement adjusting agent, comprising mixing and stirring hydrogel particles with the active system material at 300-600 revolutions/minute for 5-60 minutes.