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化工学报  2014 

二氧化碳泡沫稳定性及聚合物对其泡沫性能的影响

DOI: 10.3969/j.issn.0438-1157.2014.06.036, PP. 2219-2224

Keywords: 二氧化碳,泡沫,表面活性剂,聚合物,液膜渗透率

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Abstract:

基于CO2气体性质的特殊性以及CO2泡沫在多孔介质中表现出不同于其他气体泡沫的现象,利用气流法,选用十二烷基苯磺酸钠(SDBS)作为起泡剂,研究了CO2泡沫的稳定性和衰减规律,以及聚合物部分水解聚丙烯酰胺(HPAM)对CO2泡沫性能的影响。结果表明,在相同条件下,CO2泡沫的稳定性比N2泡沫差,并且CO2泡沫的稳定性基本不受表面活性剂浓度的影响;CO2泡沫的衰减曲线近似一条直线,泡沫形成后体积迅速减小。CO2在水中具有较大的溶解度,泡沫的液膜渗透率系数大,因而泡沫稳定性差,也是造成CO2泡沫在岩心内渗流规律区别于N2泡沫的一个重要原因。HPAM的加入可以在一定程度上增强CO2泡沫的稳定性,但同时也会使溶液起泡性能降低,所以实际应用时需要综合考虑泡沫特性,选择最佳的聚合物浓度。

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