▎ 摘　　要

NOVELTY - Plugging agent comprises 5-15 pts. wt. organic fiber material, 5-10 pts. wt. inorganic fiber material, 60-90 pts. wt. high-elasticity modified asphalt particles; where the high-elasticity modified asphalt particles are composed of matrix asphalt, obtained by modifying graphene oxide micro-sheets, high molecular polymers, and additives. The high-elasticity modified asphalt comprises 100 pts. wt. matrix pitch, 0.5-1 pts. wt. graphene oxide microplates, 1-5 pts. wt. high molecular polymer, 0.5-2 pts. wt. auxiliary agent. USE - The plugging agent is useful for oil-based drilling fluid (claimed). ADVANTAGE - The plugging agent and oil-based drilling fluid has better compatibility performance, fast plugging speed, and strong high-temperature resistance, the leakage layer pore or crack different size adaptability are wide.