▎ 摘　　要

NOVELTY - Modified asphalt particles comprise 100 pts. wt. base asphalt, 0.5-1 pt. wt. aminated graphene microsheet, 5-20 pts. wt. rubber powder, 1-5 pts. wt. reaction accelerator, and 0.5-2 pts. wt. additive. USE - The modified asphalt particles are useful in drilling fluid (claimed), preferably high temperature aqueous drilling fluid. ADVANTAGE - The modified asphalt particles have small particle size, and excellent high temperature resistance and deformation ability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the modified asphalt particles, which involves: (1) preparing aminated graphene microsheet; (2) mixing and reacting aminated graphene microsheet, base asphalt, rubber powder, reaction accelerator and additive to prepare modified asphalt; and (3) freezing, crushing and sieving.