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

魏发林 张松 丁彬 熊春明 刘平德 王典林

WEI Falin ZHANG Song DING Bin XIONG Chunming LIU Pingde WANG Dianlin

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；CO2泡沫的液膜渗透率是N2泡沫的1～3 倍，CO2泡沫稳定性比N2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，CO2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 N2 and CO2 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 CO2 foam was 1—3 times as high as that of N2 foams，so the stability of CO2 foam was lower than that of N2 foam. There was a good correlation between the foam permeability and the foam half-life. As the liquid membrane permeability increased，the CO2 foam half-life decreased rapidly.

10.19346/j.cnki.1000-4092.2022.04.015