▎ 摘　　要

Nanofluid of graphene-based amphiphilic Janus nano sheets produced high-efficiency tertiary off recovery at a very low concentration (0.01 wt %). The More attractive way is to use nanofluid during the secondary oil recovery stage, which can eliminate the tertiary stage and save huge amounts of water, especially at times when the price of oil is low, Here, we continue to report our findings on the application of the same, nanosheets secondary oil recovery, which increased oil recovery efficiency