部分水解聚丙烯酰胺对α-烯烃磺酸钠泡沫性能的影响

Influence of hydrolyzed polyacrylamide on the foam capability of α-Olefin Sulfonate surfactant

选择油田广泛使用的表面活性剂α-烯烃磺酸钠作为发泡剂,系统研究了部分水解聚丙烯酰胺对α-烯烃磺酸钠的发泡性能和泡沫稳定性的影响。部分水解聚丙烯酰胺加入α-烯烃磺酸钠溶液中,在提高体系黏度的同时,使体系的表面张力略有增加。用气流法评价二元体系的泡沫性能发现存在最佳的表面活性剂浓度,α-烯烃磺酸钠的最佳浓度在1000 mg/kg左右,此时产生的泡沫体积和泡沫稳定性最大。在最佳表面活性剂浓度下,少量部分水解聚丙烯酰胺的加入可以明显提高α-烯烃磺酸钠泡沫的稳定性,泡沫性能的增效作用最好。虽然黏度较大体系的泡沫稳定性较好,但是用罗氏泡沫仪评价时该体系的发泡能力降低,产生的泡沫较大且不均匀。部分水解聚丙烯酰胺仅是通过增大体系黏度来提高泡沫的稳定性,体系黏度相同时,部分水解聚丙烯酰胺的相对分子质量对α-烯烃磺酸钠的泡沫性能没有明显的影响。

This paper studies the influence of hydrolyzed polyacrylamide （HPAM） on the α-Olefin Sulfonate （AOS） foaming and the foam stability. Hydrolyzed polyacrylamide added into the AOS solution can increase the surface tension of the system as well as its viscosity. From the gas-flow method, the optimal AOS concentration should be 0. 1% when the biggest foam volume and the most stability are obtained. The research also shows that HPAM improves the foam stability only by increasing the system viscosity, when the system viscosity being the same, the molecular weight of hydrolyzed polyacrylamide has little influence on the foam capability.