AOS与CHSB复配体系的表面扩张性质和泡沫性能

为考察α-烯烃磺酸钠(AOS)与椰油酰胺丙基羟磺基甜菜碱(CHSB)复配体系在大庆油田泡沫驱中应用的可行性,利用界面流变仪和泡沫扫描仪研究了AOS与CHSB复配体系的表面张力、表面扩张黏弹性及泡沫性能.实验结果表明:与单剂体系相比,AOS与CHSB复配体系的界面张力和临界胶束浓度均降低.当AOS与CHSB质量比为6∶4时,复配体系的表面张力和临界胶束浓度达到最低.AOS与CHSB复配体系的表面扩张黏弹性和相角随浓度增加先增加然后降低.复配体系的表面扩张黏弹性好于单纯AOS和CHSB体系,在AOS与CHSB质量比为6∶4时,复配体系的表面扩张黏弹性最强.AOS与CHSB复配体系的泡沫稳定性有明显提高.在AOS与CHSB质量比在4∶6～7∶3之间,复配体系的泡沫性能最佳.

Surface dilational property and foam properties of compounded system of AOS with CHSB

In order to investigate the feasibility of the compounded system of sodium alpha-olefin sulfonate(AOS) with cocoamido propyl hydroxy sulfobetaine(CHSB)in the foam flooding in Daqing Oilfield,the surface tension,surface dilational viscoelasticity and foam property of the compounded system were tested using interfacial rheometer and foam scanner.The results show that,compared with AOS and CHSB,the surface tension and critical micelle concentration of the compounded system decrease,and that when the mass ratio of AOS to CHSB is 6:4,they are minimum.There are maxima of surface dilational viscoelasticity and phase angle of the compounded system with the increase of the concentration of the system.Compared with AOS and CHSB,the surface dilational viscoelasticity of the compounded system is better,and when the mass ratio of AOS to CHSB is 6:4,it is the best.Foam stability of the compounded system is also well.When the mass ratio of AOS to CHSB is 4:6～7:3,the foam property of the compounded system is the best.