阴阳离子表面活性剂复配型泡排剂的性能

Performance of the Compound Foaming Agent of Anionic-cationic Surfactant

该文运用阴阳离子表面活性剂复配体系具有协同效应和形成囊泡使泡沫稳定性增加的特点,优选出一类新型的用于气井泡沫排水的复配型泡排剂。结果表明,当阳离子表面活性剂的碳链长度小于16时,碳链越长,泡沫稳定性越好。利用正交实验设计,得到最佳质量比为m〔十二烷基硫酸钠(SDS)〕∶m〔α-烯烃磺酸钠(AOS)〕∶m〔脂肪醇聚氧乙烯醚硫酸盐(AES)〕∶m〔十六烷基三甲基溴化铵(CTAB)〕=1∶2∶2∶2,半衰期接近SDS的4倍,引入聚氧乙烯链使泡沫稳定性增加。在一定Na+浓度范围内,体系泡沫黏度最大值为112 mPa.s,半衰期最大值为50 min;但Ca2+使体系容易形成沉淀,泡沫的性能变差。体系10 min时的泡沫携液体积为126.5 mL,与甲醇的配伍性好。

In this paper, we optimized the compound foaming agent system of the mixed system of anion and cation surfactant with synergistic effect and better stability as a result of the formation of vesicles. It was found that,when the carbon chain length was less than 16,the longer the carbon chain, the better stability the foam is of. The systems were obtained by means of an orthogonal experimental design, and the optimal mixture ratio of the system was m[ sodium lauryl sulfate sodium dodecyl sulfate （SDS） ]： m [ sodium alpha-olefin sulfonate （ AOS ）]： m [ sodium alcohol ether sulphate （ AES ）]： m [ hexadecyl trimethyl ammonium bromide （ CTAB ） ] = 1 ： 2： 2： 2. The half-life period of the system was nearly 4 times that of SDS＇s, and the polyoxyethylene chain made the foam stability increase. At the same time, it was also found that the maximum value of the foam viscosity was 112 mPa · s in a certain concentration of Na ^＋ , and the maximum value of the half-time period was 50 min. But it was easy to precipitate under the condition of Ca^2＋ which made the foam performance deteriorate. Experimental evaluation indicates that the mixed system has better salt-resistance, liquid carrying capacity and compatibility with methanol.