李兆敏;王鹏;李松岩;孙乾;李杨;姜磊;王继乾;

• 1:中国石油大学石油工程学院

• 2:中国石油大学重质油国家重点实验室

摘要(Abstract)：

CO2驱油时,由表面活性剂溶液产生的CO2泡沫稳定性较差,加入纳米颗粒后可与表面活性剂产生协同作用,从而提高CO2泡沫的稳定性.通过泡沫评价实验、界面张力实验和扩张黏弹性模量实验,研究改性SiO2纳米颗粒与表面活性剂十二烷基硫酸钠(SDS)对CO2泡沫的协同稳定作用.结果表明:SiO2纳米颗粒与水的接触角大于79.83°时,能与SDS产生有效协同稳定作用,且协同稳定作用仅在SDS/SiO2混合溶液一定质量浓度比区间范围内存在,当质量浓度比为0.10~0.40时,协同稳定作用随质量浓度比增大,呈现先增强后减弱的规律;当质量浓度比为0.17左右时协同稳定作用最强;当质量浓度比大于0.40时,二者无有效协同稳定作用.SDS与SiO2纳米颗粒对CO2泡沫的协同稳定机理主要包括改善颗粒在界面的吸附位置、减弱歧化作用、改善界面性质及增大体相黏度.研究结果对提高三次采油中CO2驱的采收率具有指导意义.

关键词(KeyWords)：CO2泡沫;SiO2纳米颗粒;SDS;质量浓度比;协同稳定作用

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(51274228,51304229,U1262102);; 山东省自然科学基金项目(2012ZRE28014);; 中央高校基本科研业务费专项资金资助项目(13CX02061A,13CX05018A);; 中国石油大学(华东)科研启动基金项目(Y1204101)

作者(Author):李兆敏;王鹏;李松岩;孙乾;李杨;姜磊;王继乾;

Email:

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