气/液介质对泡沫液膜渗透性的影响规律

Effect of Gas/Liquid Properties on Foam Film Permeability

为了构建适用于泡沫驱的高稳定泡沫,从液膜渗透率角度阐明气/液介质对泡沫稳定性的影响机制。以氮气和二氧化碳为气体介质,利用气泡缩减法,测定了7种起泡体系的泡沫液膜渗透率以及起泡性能、析液半衰期和泡沫半衰期。研究结果表明,对于同一种气体介质,表面活性剂分子疏水碳链数目越多,液膜上表面活性剂分子之间相互作用越强,泡沫液膜渗透率越小;CO_(2)泡沫的液膜渗透率是N泡沫的1~3倍,CO_(2)泡沫稳定性比N泡沫的低;泡沫液膜渗透率与泡沫半衰期呈现出良好的相关性,随着液膜渗透率升高,CO_(2)泡沫半衰期快速递减。

In order to construct the highly stable foam for foam flooding,the influence mechanism of gas/liquid properties on foam stability was clarified from the perspective of liquid film permeability.The foam film permeability,foaming capability,elution half-life and foam half-life of seven foaming systems were evaluated using Nand CO_(2)as gas medium by the bubble reduction method.The results showed that for the same gas,the more the number of hydrophobic carbon chains contained in the surfactant molecules,the stronger the interactions existed between surfactant molecules on the liquid film,and the smaller the foam liquid membrane permeability became.The liquid films permeability of CO_(2)foam was 1—3 times as high as that of Nfoams,so the stability of CO_(2)foam was lower than that of Nfoam.There was a good correlation between the foam permeability and the foam half-life.As the liquid membrane permeability increased,the CO_(2)foam half-life decreased rapidly.