▎ 摘　　要

NOVELTY - Graphene oxide Janus nanosheet crosslinker comprises graphene oxide nanosheet has first side and second side, alkyl group bonded to the first side. The alkyl group selected from 1-8C alkyl, functional group bonded to the alkyl group, functional group selected from COOH, COO, OH, and O and amine bonded to the second side. USE - Graphene oxide Janus nanosheet crosslinker for carbonate formations. ADVANTAGE - The graphene oxide Janus nanosheet crosslinker improves sweep efficiency. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a method for reducing water production in thief zone in carbonate formation, which involves introducing carrier fluid comprises graphene oxide Janus nanosheet crosslinker and polymer into the carbonate formation, graphene oxide Janus nanosheet crosslinker comprises graphene oxide nanosheet having first side and second side, alkyl group bonded to the first side, alkyl group selected from 1-8C alkyl, functional group bonded to the alkyl group, functional group selected from COOH, COO, OH, and O and amine bonded to the second side, such that polymer crosslinks with the amine; and#a method for manufacturing graphene oxide Janus nanosheet crosslinker, which involves obtaining graphene oxide nanosheet comprises first side and second side, preparing graphene oxide coated wax microsphere using the graphene oxide nanosheet, graphene oxide coated wax microsphere having exterior surface comprises first side of the graphene oxide nanosheet, functionalizing exterior surface of the graphene oxide coated wax microsphere using polyamine, dissolving polyamine-functionalized graphene oxide coated wax microsphere to produce intermediate graphene oxide nanosheet having first side functionalized by polyamine and the second side, converting one or more of the groups on the second side of the intermediate graphene oxide nanosheet, using chloroacetic acid to produce graphene oxide Janus nanosheet crosslinker comprises alkyl group bonded to the first side, alkyl group selected from 1-8C alkyl, functional group bonded to the alkyl group, functional group selected from COOH, COO, OH, and O and amine bonded to the second side.