▎ 摘　　要

NOVELTY - A graphene-enhanced polymer composite comprises 0.01-10 wt.% nano-graphene material, and cross-linked polymer. Cross-linked polymer is reaction product of hydrophilic reactive polymer and hydrophobic compound or hydrophilic compound, in which hydrophilic reactive polymer comprises reactive amino group, or copolymerization product of hydrophilic monomer and hydrophobically modified hydrophilic monomer. USE - A graphene-enhanced polymer composite for reducing water permeability of wellbore in subterranean formation (claimed). ADVANTAGE - Thermal degradation resistance and compressive strength of graphene-enhanced polymer composite can be increased. The graphene-enhanced polymer composite can be applied in conformance applications to increase lifetimes and stress ranges of polymer compositions, such as relative permeability modifiers. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method of reducing water permeability of wellbore in subterranean formation which involves introducing relative permeability modifier comprising graphene-enhanced polymer composite into wellbore.