▎ 摘　　要

NOVELTY - Preparing composite weakly-gel material involves uniformly dispersing graphene oxide in an aqueous solvent to obtain a graphene oxide suspension. Under the action of stirring treatment, adding partially hydrolyzed polyacrylamide to the graphene oxide suspension to obtain a mixed material, adding covalent bond type cross-linking agent, followed by maintenance treatment, namely obtaining the composite weak-gel material, adding ionic bond type cross-linking agent into the oxidized graphene suspension, then under the action of stirring treatment, adding partially hydrolyzed polyacrylamide, and after sequentially performing swelling treatment and curing treatment, the composite weak gel material is obtained. USE - Method for preparing composite weakly-gel material in oil displacement agent for oil field development (claimed). ADVANTAGE - The method adopts the method of physical blending, without adding any other surfactants and additives, so that the composite weak gel formed by graphene oxide and partially hydrolyzed polyacrylamide has high fluid viscosity, good temperature resistance and mechanical properties, and the operation process is simple, easy to operate, very suitable for water control and deep profile control in ultra-low permeability reservoirs. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a composite weakly-gel material prepared by the preparation method.