泡沫驱用起泡剂BS-12的界面特性及泡沫性能  

Interfacial Viscoelasticity and Performance Properties of BS-12 Foam for EOR

作　　者：汪庐山[1] 于田田[2] 曹秋芳[2] 曹嫣镔[2] 曹嫣红[3] 孟秋玉[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东东营257061 [2]中国石化胜利油田公司采油工艺研究院,山东东营257000 [3]胜利石油管理局地质科学研究院,山东东营257015

出　　处：《油田化学》2007年第1期70-74,共5页Oilfield Chemistry

基　　金：中国石油化工集团科技攻关项目"泡沫驱替提高稠油开发效果研究"(项目编号P03024)

摘　　要：研究了泡沫驱用阴离子起泡剂BS-12的界面特性及其与泡沫特性的关系。用扩张压缩界面张力仪测定,BS-12水溶液在饱和CO2气后,与正辛烷之间的界面张力、界面弹性模量E*及其弹性分量E′明显降低,其黏性分量E″略有降低,损耗角减小,说明弹性变形在泡沫变形中起主导作用。讨论了泡沫携液系数(携液能力)和稳定系数的测定方法,用泡沫扫描仪在不同气液比下测定,CO2气/BS-12泡沫的稳定系数与携液系数之间有正相关性,携液系数在一定范围时对泡沫稳定性有较大影响。加入不同量正辛烷改变N2气/BS-12泡沫的稳定性,求得泡沫稳定系数与界面弹性模量E*(即泡沫变形能力)之间有良好的线性关系。图11参8。The interfacial properties of anionic foaming agent BS-12 and the performance properties of CO2/BS-12 foam for EOR are investigated. As measured by using an automatic drop tensiometer and, in particular, in oscilatory expansion/contraction mode, a notable decrease in dynamic interracial tension and complex elastic modulus, E^＊, in elastic component of modulus, E′, and in loss angle and a slight decrease in viscous component of modulus,E″, are observed between aqueous BS-12 solution saturated with gaseous CO2 and n-octane in comparison with that between plain BS-12 solution and n-octane, which indicates the dominant role of interfacial elasticity in deformability of the foam. The ways of determining foam entrainment coefficient and stability factor are discussed and presented. The determinations obtained at different CO2 gas to solution volume ratio by using a scanning foam apparatus show that a positive correlation exists between the entrainment coefficient and the stability factor and the former within some values exerts notable effects on the later. The determinations obtained with different amount of n-octane added to vary the foam stability show that a good linear relationship exists between the foam stability factor and the interracial elasticity modulus, E^＊, or the foam deformability, for N2/IK-12 foam.

关 键 词：阴离子表面活性剂 起泡剂 泡沫 动态界面张力 界面弹性模量 携液系数 稳定系数 泡沫驱 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] O648.24[理学—物理化学]