油气地质与采收率2025，Vol.32Issue(2)：170-182,13.DOI:10.13673/j.pgre.202409010
微乳液相态技术在表面活性剂驱中的应用
Application of microemulsion phase behavior technology in surfactant flooding
摘要
Abstract
Surfactants are extensively used in chemical flooding due to their excellent ability to reduce oil-water interfacial tension,alter rock surface wettability,and promote oil-water emulsification.It was previously believed that the middle phase microemulsion could only occur at high surfactant concentrations.Therefore,the evaluation of surfactants for chemical flooding mostly depends on interfacial tension measurement.The role of microemulsion phase behavior technology in the screening and development of surfac-tants for tertiary oil recovery is neglected.Thanks to the technological advancement in surfactant development in the past two de-cades,ideal middle phase microemulsions have been achieved by crude oil systems with low acid values at low surfactant concentra-tions.As a result,it is imperative to use microemulsion phase behavior technology to guide the development of new surfactants and the performance optimization of the composite system.This paper started with the concept and classification of microemulsions and systematically introduced four emulsification types of microemulsions,namely Winsor Ⅰ,Ⅱ,Ⅲ,and Ⅳ.The formation mecha-nism of the four types of microemulsions was described from the aspects of oil-water interfacial tension,surfactant molecular struc-ture,and micellar morphology.The mechanism involved instantaneous negative interfacial tension theory,duplex film theory,R ra-tio theory,and geometric arrangement theory.The microemulsion phase behavior technology was introduced in detail in terms of phase pattern identification,composition calculation of oil,water,and surfactant in the microemulsion phase,and laboratory op-eration.In terms of processing results of phase behavior experiments,it was introduced in detail how to calculate the solubilization index of the oil and water phases in the microemulsion through their respective volume changes and how to calculate the interfacial tension between the microemulsion phase and oil and water through the solubilization index,so as to determine the optimal salinity of the composite system.This paper hopes to attract people's attention to the microemulsion phase behavior technology and promote its application in the research and development of surfactants for high-efficiency tertiary oil recovery,the study of oil displacement mechanism,and the optimization of composite system formulation,thus improving the technical level of compound flooding in China.关键词
微乳液/相态/三次采油/最佳盐度/表面活性剂Key words
microemulsion/phase behavior/tertiary oil recovery/optimal salinity/surfactant分类
能源科技引用本文复制引用
隋欣,李禹羲,吕明,张国印,丁奎升..微乳液相态技术在表面活性剂驱中的应用[J].油气地质与采收率,2025,32(2):170-182,13.基金项目
上海市教育科学研究项目"数字赋能行业驱动的新型高职智慧管网产业学院建设实践研究"(C2024184),中国建设教育协会教育教学科研课题重点项目"给排水行业产教融合人才培养的模式探索与实践"(2023054),上海交通职业技术学院科研创新团队建设项目"超大城市生命线韧性研究"(2024T01). （C2024184）
