纳米颗粒CO2泡沫体系稳定性机理研究

Stability Mechanism of Nanoparticle CO2 Foam System

近年来纳米颗粒/表面活性剂复合体系提高CO2泡沫驱性效果明显,其稳定泡沫的机理越来越受到关注。通过研究不同纳米颗粒体系泡沫的ZETA电位、接触角,深入的研究泡沫稳定的机理,为泡沫稳定剂的选取提供了一个新的筛选方式。研究结果表明:泡沫体系的ZETA电位与接触角共同决定了泡沫的稳定性,发泡体系溶液的ZETA电位越高、与岩心的接触角越接近90°,纳米颗粒对泡沫液膜吸附强度越高,泡沫越稳定。

In recent years, the effect of nanoparticle/surfactant composite system on improving CO2 foam flooding is obvious. The mechanism of stable foam has attracted more and more attention. By studying the ZETA potential and contact angle of different nanoparticle systems, the mechanism of foam stability was studied in depth, which could provide a new way to select foam stabilizer. The results showed that the ZETA potential and contact angle of the foam system determined the stability of the foam. The higher the ZETA potential of the foaming solution, the closer to 90°the contact angle to the core;The higher the adsorption strength of the nanoparticle to the foam liquid membrane, the more stable the foam.