起泡剂发泡特性及其影响因素研究

通过对泡沫复合体系发泡特性的静态实验研究,评价了泡沫复合体系发泡特性及泡沫稳定性.通过细玻璃管测定法和综合发泡能力的经验公式,讨论了表面活性剂类型和结构、聚合物分子量、碱浓度、地层水矿化度、温度及原油性质对体系发泡性能的影响.通过研究,得到了泡沫复合驱中表面活性剂、碱和聚合物都存在一个合理的浓度临界值,且随着矿化度、温度和原油轻质含量的增加,体系的综合发泡能力降低的结论.同时得到了不同表面活性剂类型中,硫酸盐型表面活性剂发泡效果最好,磺酸盐直链型次之;而同一类型表面活性剂中,随着表面活性剂碳链长度的增加,发泡效果变好,但碳链增加到一定长度后,综合发泡能力下降的认识.

Study on the foaming behavior of foaming agent and its influencing factors

The foaming behavior of the foam compound system and the stability of the foam are evaluated by static experiments.The effects of the type and structure of surfactants,the molecular mass of polymer,the concentration of alkaline,the salinity of formation water,experimental temperature and the property of crude oil on the foaming behavior of the compound system are studied by using thin glass tube measuring method and the empirical formula for calculating the foaming ability of foaming agents.It is shown that,in foam compound oil-displacement,there are the reasonable concentrations of surfactant,alkaline and polymer;the foaming ability of the foam compound system decreases with the increases of the formation water salinity,the experimental temperature and the light component content in the crude oil;among different types of surfactants,the foaming behavior of sulfates surfactants is the best,that of straight-chain sulfonates surfactants is secondary,to the same type of surfactants,the longer the carbon chain of the surfactant,the better the foaming behavior of it,but the foaming behavior will become worse when the carbon chain reaches to certain length.