油气地质与采收率2025，Vol.32Issue(5)：170-177,8.DOI:10.13673/j.pgre.202406043
Winsor Ⅲ型微乳液提升高温高盐低渗透油藏采收率机理研究
Mechanism of Winsor Ⅲ microemulsion in enhancing oil recovery in high-temperature,high-salinity and low-permeability reservoirs
吕伟 1薛芳芳 1何思娴 1张荣 1王怡文 2陈海龙2
作者信息
- 1. 中国石油长庆油田分公司 油气工艺研究院,陕西 西安 710018||低渗透油气田勘探开发国家工程实验室,陕西 西安 710018
- 2. 西南石油大学 油气藏地质与开发工程国家重点实验室,四川 成都 610500
- 折叠
摘要
Abstract
Winsor Ⅲ microemulsion flooding is an effective means to solve the low production percentage of high-temperature,high-salinity and low-permeability reservoirs,but the research on the construction and mechanism understanding of Winsor Ⅲ microemulsion flooding system is insufficient.In this paper,the Winsor Ⅲ microemulsion system with temperature resistance and salt resistance was constructed through the solubility test,oil-water interfacial tension test,and phase behavior test of two types of surfactants and their composite systems under the conditions of simulated reservoirs.Then,the feasibility of the system in enhancing oil recovery of low-permeability reservoirs was explored through core displacement experiments,contact angle testing experiments,and visual core displacement experiments.The mechanisms of enhancing oil recovery were analyzed from two aspects:changes in wettability and solubilization and emulsification.The results show that alcohol ether carboxylate surfactant ST 982-B can construct a Winsor Ⅲ microemulsion system at the mass fraction of 0.3％-0.5％;the microemulsion system can effectively enhance oil recovery of low-permeability reservoirs by 7.8％-9.7％.The microemulsion system can effectively improve the rock wettability,and the"denudation"of oil film after solubilization and emulsification of the system further enhances the oil displacement efficiency.关键词
高温高盐/低渗透油藏/Winsor Ⅲ型微乳液/表面活性剂/提高采收率/润湿性/增溶乳化/接触角Key words
high temperature and high salinity/low-permeability reservoir/Winsor Ⅲ microemulsion/surfactant/enhanced oil recovery/wettability/solubilization and emulsification/contact angle分类
能源科技引用本文复制引用
吕伟,薛芳芳,何思娴,张荣,王怡文,陈海龙..Winsor Ⅲ型微乳液提升高温高盐低渗透油藏采收率机理研究[J].油气地质与采收率,2025,32(5):170-177,8.
