西南石油大学学报（自然科学版）2023，Vol.45Issue(6)：185-192,8.DOI:10.11885/j.issn.1674-5086.2021.06.03.02
甜菜碱泡沫稳定性的高盐增效机制
Mechanisms of High-salinity Improvement of the Stability of Betaine Foam
摘要
Abstract
Betaine foam,characterized by its salt tolerance and the heightened stability with increasing salinity,holds a u-nique advantage in improving oil recovery in high-salinity reservoirs.In this paper,cocoamidopropyl hydroxysulfobetaine and dodecyl hydroxypropyl sulfobetaine were taken as the foam system to explore the mechanisms of high-salinity improve-ment foam stability.Foam performance tests have proceeded under various high-salinities.Particular attention was given to the surface dilatation rheology and diffusion-adsorption behaviors.The results showed that when the concentration of NaCl increased from 2.3％to 21.1％,the drainage velocity of betaine foam at the initial stage had little change,but the half-life of the foam could be extended by 13 times.With increased salinity,the saturated adsorption amount of betaine increased and the diffusion-adsorption rate decreased,which led to the increase of the dilatation modulus and the enhancement of the elasticity of the liquid film.Therefore,the coarsening and coalescence of betaine foam were significantly inhibited,resulting in improved foam stability.This work will generate fresh insight into the mechanisms of foam stability and optimization of foam system in high-salinity reservoirs.关键词
甜菜碱/泡沫稳定性/高盐/扩张流变性/扩散吸附Key words
betaine/foam stability/high salinity/dilatation rheology/diffusion-absorption分类
能源科技引用本文复制引用
孙琳,董硕,张永昌,辛军,蒲万芬..甜菜碱泡沫稳定性的高盐增效机制[J].西南石油大学学报（自然科学版）,2023,45(6):185-192,8.基金项目
国家自然科学基金(51904256) （51904256）
