▎ 摘　　要

NOVELTY - Use of modified nano-graphene oxide as low permeability reservoir for improving recovery ratio chemical agent, is claimed. The modified nano-graphene oxide is oxidized, exfoliating and removing impurity from microcrystalline graphite to obtain microcrystalline graphene oxide, and modifying by modifying agent. The particle size of the modified nano-graphene oxide is less than or equal to 300 nm. The modified nano-graphene oxide is mixed with mineralized water to form fluid injection reservoir formation. USE - The nano-graphene oxide is used as low permeability reservoir for improving recovery ratio chemical agent (claimed). ADVANTAGE - The nano-graphene oxide: has flexible sheet structure with size less than 300 nm, low adsorption loss in the formation and excellent temperature and salt resistance; is suitable for size of the pore throat of low-permeability oil reservoirs; does not cause damage to the formation e.g. blockage; and overcomes current problems faced in the development of low-permeability reservoirs.