非均相复合驱油体系与原油动态界面张力特性研究

Study on Dynamic Interfacial Tension Characteristics Between Heterogeneous Compound Drive System and Crude Oil

系统研究了表面活性剂/聚合物/预凝胶颗粒PPG形成的非均相复合驱油体系与坨28原油之间的动态界面张力,考察了非均相复合驱油体系各组分的浓度和复配比例对坨28原油动态界面张力的影响。结果表明,表面活性剂与单独聚合物或PPG之间不存在明显的协同效应,但与聚合物和PPG的复配体系存在协同效应。坨28原油与非均相复合驱油体系之间的界面张力在适宜的聚合物和凝胶颗粒浓度下可达到最低值。对于类型不同的表面活性剂甜菜碱与阴-非离子表面能活性剂而言,体系与坨28原油的界面张力达到最低时,聚合物与凝胶颗粒的复配比例不同,这可能与两种表面活性剂本身的结构有关。

The dynamic interfacial tensions between the heterogeneous composite flooding systems formed by surfactant/polymer/preformed particle gel(PPG)and Tuo 28 crude oil were systematically studied.The influence of each component of the heterogeneous systems on the dynamic interfacial tension of Tuo 28 crude oil was investigated.The results show that there is no obvious synergistic effect between surfactants and polymers,or between surfactants and PPG.However,the synergism can be observed for surfactant/polymer/PPG systems.The interfacial tensions between the Tuo 28 crude oil and the heterogeneous systems can reach the lowest value under the appropriate polymer concentration and gel particle concentration.For different types of surfactants,betaine and nonionic-anionic surfactants,when the interfacial tension between the system and crude oil reaches the minimum,the compounding ratio of polymer and gel particles is different,which may be related to the structure of the two surfactants.