重烷基苯磺酸盐的界面性质和驱油机理

重烷基苯磺酸盐是在三次采油中广泛采用的表面活性剂之一，但重烷基苯原料组成复杂导致最终磺化产物的驱油效果差异很大.实验通过柱层析的方法将重烷基苯分离成6个族组分，并对其中的二烷基苯、单烷基苯和二烷基茚萘满、烷基萘、多苯烷进行磺化，中和提纯后对各磺酸盐进行界面张力测定.通过对比不同矿化度下界面张力以及各组分复配后的界面张力，对原油等效烷烃数(EACN)以及各组分碳数最低值(nmin)测定，得出各组分之间协同效应的规律和复配机理，从而阐明了重烷基苯磺酸盐的驱油机理.通过研究十二烷基苯磺酸钠(LAS)与各组分之间的复配作用对上述规律和机理进行了进一步验证.

The Interface Behavior and Enhanced Oil Recovery Mechanism of Heavy Alkylbenzene Sulfonates

Heavy alkylbenzene sulfonates (HABS) have been applied in enhanced oi l recovery(EOR) for many years, but the effect of oil flooding is quiet differen t as variety of HABS composition. In this study, HABS was separated into 6 group-types with column chromatography,and dialkylbenzene, polyphenylalkane, monoalk ylbenzene, alkylnaphthalene were sulfonated and purified. The interfacial tensio n (IFT) and the synergistic effect between these components were studied,and th e mechanism and rules of the synergistic effect between HABS components were obt ained from the EACN value of oil and the nmin values of HABS components. Moreove r, the rules were further confirmed by the synergistic effect between LAS and th e HABS components.