The Paraffin Crystallization in Emulsified Waxy Crude Oil by Dissipative Particle Dynamics  

作　　者：Ruiqiong Wang Tiantian Du Jinchen Cao Guoqiang Wang 

机构地区：[1]Power China Chongqing Engineering Co.,Ltd.,Chongqing,400060,China [2]College of Electrical Engineering,Xinjiang University,Urumqi,830017,China [3]Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,Ministry of Education,School of Energy and Power Engineering,Chongqing University,Chongqing,400030,China

出　　处：《Frontiers in Heat and Mass Transfer》2024年第1期129-139,共11页热量和质量传递前沿（英文）

基　　金：sponsored by Natural Science Foundation of Xinjiang Uygur Autonomous Region,Grant No.2023D01C197;Performance Incentive Guidance Project of Chongqing Scientific Research Institutions(cstc2022jxjl20016).

摘　　要：With the advancement of oilfield extraction technology,since oil-water emulsions in waxy crude oil are prone to be deposited on the pipe wall,increasing the difficulty of crude oil extraction.In this paper,the mesoscopic dissipative particle dynamics method is used to study themechanism of the crystallization and deposition adsorbed on thewall.The results show that in the absence of water molecules,the paraffin molecules near the substrate are deposited on themetallic surface with a horizontalmorphology,while the paraffin molecules close to the fluid side are arranged in a vertical column morphology.In the emulsified system,more water molecules will be absorbed on the metallic substrate than paraffin molecules,which obstructed the direct interaction between paraffin molecules and solid surface.Therefore,the addition of watermolecules hinders the crystallization of wax near the substrate.Perversely,on the fluid side,water molecules promote the formation of paraffin crystallization.The research in this paper reveals the crystallization mechanism of paraffin wax in oil-water emulsions in the pipeline from the microscopic scale,which provides theoretical support for improving the recovery of wax-containing crude oil and enhancing the transport efficiency.

关 键 词：Emulsified waxy crude oil paraffin crystal DEPOSITION dissipative particle dynamics 

分 类 号：O35[理学—流体力学]