耐油起泡剂的耐油耐盐性能评价

Research and Evaluation of Oil-resistance and Salt-resistance of Oil-resistant Foaming Surfactant

以吴茵搅拌器法评价了由非离子表面活性剂、阴非离子表面活性剂和稳泡剂辛醇按一定比例配制的4种耐油起泡剂的耐油耐盐性能。研究结果表明:随着起泡剂质量分数的增大,起泡剂溶液的最大泡沫体积逐渐增大,在起泡剂质量分数为0.01%数0.5%范围内,起泡剂溶液的发泡体积是自身溶液体积的2数6倍,泡沫半衰期随着表面活性剂浓度增加而逐渐增大;随着原油比例增加,最大泡沫体积先增大后降低,油含量在10%数20%范围时起泡剂表现出了很好的起泡、稳泡性能,最大发泡体积是自身的5数9倍,泡沫半衰期随着油含量增加而明显增大;其中CFE149X(非离子表面活性剂、阴非离子表面活性剂和稳泡剂辛醇质量比为30∶67∶3)的起泡和稳泡性能最佳。在CFE149X质量分数为0.5%、含油量50%的条件下,最大泡沫体积和半衰期均随盐含量增加而先增大后减小;与无油存在时相比,有油存在时泡沫发泡体积略有降低,但泡沫稳定性却显著增强。耐油起泡剂CFE149X,在含油条件下表现出了较好的起泡性能和稳泡性能,能够作为耐油抗盐泡沫剂,为泡沫复合驱提供优良的起泡剂产品提供技术参考。

The performance of oil-resistance and salt-resistance of 4 kinds of foaming surfactants,composed of a non-ionic surfactant,a non-ionic surfactant and the stabilizer octanol, was evaluated by Wuyin agitator method. The results showed that with the surfactant concentration increased,the volume of foam increased gradually,and the foaming volume was 2-6 times the volume of its own solution at the surfactant concentration of 0.01%-0.5%. Foaming half-life increased with the surfactant concentration increased. With the proportion of crude oil increasing,the maximum foaming volume increased first and then decreased. 4 kinds of foaming surfactants showed good foam capacity when the oil content was of 10%-20%,the maximum foaming volume was 5-9 times volume of its own solution,and the half-life increased obviously with the increase of oil content. CFE149X,a mixture of non-ionic surfactant,non-ionic surfactant and the stabilizer octanol with mass ratio 30∶67∶3,had a good foaming stability and foaming performance in the presence of oil. When the surfactant concentration was 0.5% and the oil content was 50%,the foaming volume and the foaming half-life increased first and then decreased with the increase of salt content. Compared with the system without oil,it was showed that the maximum foaming volume was lower;however,the foam stability was significantly enhanced. The oil-resistant foaming surfactant CFE149X could be used as oil-resistant and salt-resistant foaming surfactant to provide foaming surfactant products of foaming flooding for the reservoir application.