Study on the thixotropy and structural recovery characteristics of waxy crude oil emulsion

作     者：Li-Ping Guo Xue Han Yun Lei Lei Wang Peng-Fei Yu Shuang Shia Li-Ping Guo;Xue Han;Yun Lei;Lei Wang;Peng-Fei Yu;Shuang Shi

作者机构：Key Laboratory of Enhanced Oil RecoveryMinistry of EducationNortheast Petroleum UniversityHeilongjiang163000China Jiangsu Key Laboratory of Oil and Gas Storage&Transportation TechnologyChangzhou UniversityJiangsu213164China Exploration and Development Research InstituteDaqing Oil Field Company LtdDaqingHeilongjiang163712China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2021年第18卷第4期

页      面：1195-1202页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082003[工学-油气储运工程] 

基　　金：supported by the Natural Science Foundation of Heilongjiang Province(Grant No.LH2020E015) the General Project of Natural Science Research in Jiangsu Universities(Grant No.20KJB440004) the science and technology program of Changzhou University(Grant No.ZMF18020303 and ZMF18020304) the science and technology program of Jiangsu Key Laboratory of Oil and Gas Storage&Transportation Technology(Grant No.CDYQCY201903,CDYQCY201904 and CDYQCY202003)。 

主　　题：Waxy crude oil Emulsion Thixotropic properties Structural recovery Hysteresis loop 

摘      要：Waxy crude oil emulsion has thixotropic properties at the temperature near gel point,which is a macromechanical characterization of the structure failure and recovery of waxy crude oil emulsion.In this paper,the thixotropic behaviors of waxy crude oil emulsion near gel point were studied using hysteresis loop formed by stress linear increase and decrease,as well as the structural recovery characteristics.The influence of the loading conditions and water content on the thixotropy of waxy crude oil emulsion were analyzed with hysteresis loop area.The concept ofstructural recoverywas introduced to study the degree of structural recovery after different stewing,and influencing factors were taken into account.Results have shown that for waxy crude oil emulsion,the failure to fully restore of the structure after lysis is the cause of the formation of hysteresis loop,and the loading conditions will not affect the strength of thixotropy and the degree of structural recovery.Additionally,the dispersed phase droplets weaken the thixotropy and structure recovery characteristics of waxy crude oil emulsion,and the greater the water content,the weaker the thixotropy.The findings can help to better understand the safe and economic operation of waxy crude oil-water pipeline transportation.