Abstract: Different carbon number of linear alkyl benzene, alkyl toluene and alkyl dimethyl benzene were synthesized by using in situ ionic liquid catalytic alkylation reaction with linear alpha olefins, benzene, toluene, mixed xylene as raw materials. A series of alkyl aryl sulfonates with different molecular weight were synthesized by sulfonation, neutralization and purification. Their purity was all greater than 97.0%. Different mean molecular weight and different distribution of sulfonate systems have different ability to reduce oil-water interface tension. The flooding system composed of the average molecular weight is 432 with the incremental and inverse distributions and alkali and polymer were tested to Daqing oil showed that the oil recovery can be enhanced by 22% OOIP on the bases of water flooding.

Key words: alkyl aryl sulfonate, mean molecular weight and its distribution, ultra low interfacial tension, ASP flooding

摘要： 以直链α烯烃、苯、甲苯、混和二甲苯等为原料，采用原位离子液体催化烷基化反应分别合成出不同碳数的直链烷基苯、烷基甲苯和烷基二甲苯，经降膜式磺化、中和反应、提纯等方法制得不同相对分子质量的烷基芳基磺酸盐，其纯度均大于97.0%，仪器分析证明了其结构与设计相符。不同平均分子量、不同分布形式的磺酸盐体系降低油水界面张力能力不同；平均分子量为432、递增分布和反正态分布体系与碱、聚合物组成的三元复合体系在人造岩心上，室内模拟驱油可在水驱基础上提高采收率22%以上。

关键词: 烷基芳基磺酸盐, 平均分子量及其分布, 超低界面张力, 三元复合驱