▎ 摘　　要

NOVELTY - Carbon-based nano-wetting reversing agent comprises modified nano-graphene oxide, surfactant and solvent I, the solvent I is at least one of alcohol compounds. USE - The carbon-based nano-wetting reversing agent is useful in drilling fluid (claimed). ADVANTAGE - The reversing agent: can maintain the surface of rock formation in hydrophilic state; converts the wettability of the oil-wet rock surface into water-wet, which is conducive for subsequent water injection in water injection wells and improves the recovery rate of oil production wells. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing carbon-based nano-wetting reversing agent comprising, mixing modified nano-graphene oxide, surfactant and solvent I and then stirring to obtain final product.