▎ 摘　　要

NOVELTY - A temperature-resistant and oil-resistant composite graphite plugging agent comprises graphene oxide, modified graphene oxide and polymer/graphene oxide. The modified graphene oxide is graphene oxide modified by at least one of carboxyl, amide, sulfonic acid, benzenesulfonic acid, hydroxyl and silicon-oxygen bonds. The polymer in the polymer/graphene oxide is one or more of polyester, polyamide and polymethyl silicone resin. USE - Temperature-resistant and oil-resistant composite graphite plugging agent used in oil-based drilling fluid (claimed). ADVANTAGE - The plugging agent has excellent high temperature resistance, stable pressure bearing performance, excellent plugging performance for microcracks and excellent compatibility with oil-based drilling fluid, and effectively reduces the fluid loss of drilling fluid. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of temperature-resistant and oil-resistant composite graphite plugging agent in oil-based drilling fluid