A review on the application of nanofluids in enhanced oil recovery  

作　　者：Jinjian Hou Jinze Du Hong Sui Lingyu Sun 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China [2]National Engineering Research Centre of Distillation Technology,Tianjin 300072,China [3]Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China

出　　处：《Frontiers of Chemical Science and Engineering》2022年第8期1165-1197,共33页化学科学与工程前沿（英文版）

基　　金：funded by the 973 National Basic Research Program of China(Grant No.2015CB251403).

摘　　要：Enhanced oil recovery(EOR)has been widely used to recover residual oil after the primary or secondary oil recovery processes.Compared to conventional methods,chemical EOR has demonstrated high oil recovery and low operational costs.Nanofluids have received extensive attention owing to their advantages of low cost,high oil recovery,and wide applicability.In recent years,nanofluids have been widely used in EOR processes.Moreover,several studies have focused on the role of nanofluids in the nanofluid EOR(N-EOR)process.However,the mechanisms related to N-EOR are unclear,and several of the mechanisms established are chaotic and contradictory.This review was conducted by considering heavy oil molecules/particle/surface micromechanics;nanofluidassisted EOR methods;multiscale,multiphase pore/core displacement experiments;and multiphase flow fluid-solid coupling simulations.Nanofluids can alter the wettability of minerals(particle/surface micromechanics),oil/water interfacial tension(heavy oil molecules/water micromechanics),and structural disjoining pressure(heavy oil molecules/particle/surface micromechanics).They can also cause viscosity reduction(micromechanics of heavy oil molecules).Nanofoam technology,nanoemulsion technology,and injected fluids were used during the EOR process.The mechanism of N-EOR is based on the nanoparticle adsorption effect.Nanoparticles can be adsorbed on mineral surfaces and alter the wettability of minerals from oil-wet to water-wet conditions.Nanoparticles can also be adsorbed on the oil/water surface,which alters the oil/water interfacial tension,resulting in the formation of emulsions.Asphaltenes are also adsorbed on the surface of nanoparticles,which reduces the asphaltene content in heavy oil,resulting in a decrease in the viscosity of oil,which helps in oil recovery.In previous studies,most researchers only focused on the results,and the nanoparticle adsorption properties have been ignored.This review presents the relationship between the adsorption properties of nanoparticles and the

关 键 词：NANOFLUID EOR mechanism nanoparticle adsorption interface property internal property 

分 类 号：TB383[一般工业技术—材料科学与工程]