石油化工2025，Vol.54Issue(3)：372-378,7.DOI:10.3969/j.issn.1000-8144.2025.03.011
微泡沫对高温高盐油藏稠油的降黏促进作用
Viscosity reduction effect of microfoam on heavy oil in high-temperature and high-salinity reservoirs
摘要
Abstract
To address the issue of weak microfoam stability in high-temperature and high-salinity reservoirs,a foaming system resistant to high-temperature and high-salinity was optimized,which used polyacrylamide polymer SAV10 as a foam stabilizer and surfactants erucamidopropyl betaine and lauryl dimethyl betaine as foaming agents.Microfoam could be produced by this foaming system when stirred at a speed of 6 800 r/min for 1 min.The emulsification and viscosity reduction effect of the foaming system and microfoam on heavy oil,as well as the stability of oil/water emulsions,were compared.The results show that the microfoam has a better emulsification and viscosity reduction effect than the foaming system.The foaming rate can reach 420%in the optimized foaming system.At 90℃,the viscosity retention rate of the foaming system after 60 d exceeds 88%.The prepared microfoam exhibits a half-life of drainage of 1 161 s,indicating excellent stability.When preparing the foaming system and microfoam using mineralized water with a salinity of 218.1 g/L,at 90℃and mass ratios of heavy oil to mineralized water of 30∶70,50∶50,and 70∶30,both the foaming system and microfoam are capable of emulsifying the heavy oil.The foaming system achieves a viscosity reduction rate greater than 89%and a water separation rate exceeding 80%.The microfoam demonstrates a viscosity reduction rate of over 95%,and although its water separation rate is relatively lower,it still exceeds 60%.关键词
微泡沫/降黏率/析水率/高温高盐油藏/发泡率/析液半衰期Key words
microfoam/viscosity reduction rate/water separation rate/high-temperature and high-salinity reservoirs/foaming rate/half-life of drainage分类
石油、天然气工程引用本文复制引用
黄志学,王业飞,张富民,邵文博,丁名臣..微泡沫对高温高盐油藏稠油的降黏促进作用[J].石油化工,2025,54(3):372-378,7.基金项目
国家自然科学基金项目(52474071). （52474071）
