2D Janus polymer nanosheets for enhancing oil recovery:From material ppreparation to property evaluation

作     者：Hao Shen Zi-Hao Yang Guan-Zhong Wang Yi-Lin Xiong Qi-Chao Lv Qi Cao Qi-Qi Niu Yi-Bo Wang Zhao-xia Dong 

作者机构：Unconventional Petroleum Research InstituteChina University of Petroleum(Beijing)Bejing102249China Sinopec Zhenhai Refining and Chemical CompanyNingbo315207ZhejiangChina Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina School of Energy ResourcesChina University of Geosciences(Bejing)Bejing100083China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2023年第20卷第3期

页      面：1584-1597页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：supported by the National Natural Science Foundation of China(52074320) Petrochina Strategic Cooperation Science and Technology Project(ZLZX2020-01-04-03) 

主　　题：2D materials Polymer nanosheets Enhance oil recovery Janus nature Amphiphilic property 

摘      要：Janus amphiphilic polymer nanosheets(JAPNs)with anisotropic morphology and distinctive perfor-mance have aroused widespread ***,due to the difficulty in synthesis and poor dispersion stability,JAPNs have been scarcely reported in the field of enhancing oil recovery(EOR).Herein,a kind of organic-based flexible JAPNs was prepared by paraffin emulsion *** lateral sizes of JAPNs were ranging from hundreds of nanometers to several micrometers and the thickness was about 3 *** organic-based nanosheets were equipped with remarkably flexible structures,which could improve their injection *** dispersion and interfacial properties of JAPNs were studied *** modification of crosslinking agent containing multiple amino groups,the JAPNs had excellent hydro-philicity and salt resistance compared with conventional inorganic or composite *** settling time of nanosuspension with NaCl and CaCl_(2) at a low salinity of 1000 mg/L was over 240 *** value could also remain 124 h under the salinity of 10,000 mg/L *** the dual functionalities of Janus amphiphilic nature and nanoparticles Pickering effect,JAPNs could change rock wettability and form emulsions ascolloidal surfactants,In particular,a new technology called optical microrheology was pioneered to explore the destabilization state of nanosuspensions for the first *** precipitation lagged behind aggregation,especially for stable suspension systems,the onset of the unstable behavior was difficult to be detected by conventional methods,which should be the indicator of reduced effec-tiveness for nanofluid *** addition,the oil displacement experiments demonstrated that the JAPNs could enhance oil recovery by 17.14%under an ultra-low concentration of 0.005%and were more suitable for low permeability *** findings can help for a better understanding of the material preparation of polymer *** also hope that this study could shed more light