▎ 摘　　要

NOVELTY - Carbon-based nano profile control agent comprises a carbon-based nano substrate, where the carbon-based nano substrate is modified with a hydrophilic flexible group and a hydrophobic rigid group. The hydrophilic flexible group is polyacrylic acid, polyethylene glycol, polyacrylamide, and acrylamide. The hydrophobic rigid group is selected from aromatic groups or substituted aromatic groups. USE - Carbon-based nano profile control agen used in oilfield profile control (claimed). ADVANTAGE - The carbon-based nano profile control agent realizes the non-homogeneous oil reservoir profile effect of long-term effect, tolerates high salt reservoir condition and keeps the stable dispersibility in the range. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a carbon-based nano profile control agent, which involves heating carbon-based nano substrate, the hydrophilic flexible group source, and the hydrophobic rigid group source and copolymerizing to obtain product.