两性表面活性剂系指分子结构中既具有阳离子亲水基团, 又具有阴离子亲水基团的特殊类型的表面活性剂。甜菜碱型两性表面活性剂是其中的一种, 是由KrUger早期从甜菜中分离而来的天然甜菜碱, 当其中一个CH₃被长链烷基取代后衍生出的一种表面活性剂。由于甜菜碱型表面活性剂特殊的亲水基结构, 使其具有刺激性低、耐硬水性好、适用范围广等优点, 而在日化行业中得到广泛的应用。将甜菜碱型表面活性剂用于提高原油采收率的报道很少。我们对甜菜碱型表面活性剂的分子结构进行了优化研究, 合成出了具有特殊结构的甜菜碱型表面活性剂, 在无碱和弱碱条件下与大庆原油的界面张力都达到了超低, 并进行了室内岩芯驱油实验和微观仿真模型实验, 取得了较好的实验结果影音翻译。

Ampho-surfactant is a special type of surfactant that both contains cation hydrophilic grouping and anion hydrophilic grouping. Beet Alkalescence Surface Active Agent is one of them, which is aparted from beet by KRUGER. It is one surface active agent derived after CH_{3 is} replaced by long-chain alkyl. Due to its special hydrophilic group frame, it has advantages of low thrill, fine hard water feature and wide applicability. Further, it is widely used in day industry. There are few reports about using beet alkalescence surface active agent in improving recovery ratio of crude oil. We made a optimized research about the molecule frame of beet alkalescence surface active agent, and we composed a beet alkalescence surface active agent which had special structure. In non-alkali or low-alkali condition, the interfacial tension of beet alkalescence surface active agent and Daqin curde oil can reach the super low level, and the result of internal rock core driving oil experiment and microcosmic model copying experiment was meaningful.