摘要
为获得适合稠油开采的驱油剂,设计合成了两亲聚合物驱油剂体系ICJN。采用扫描电镜(SEM)、荧光显微镜、旋滴界面张力仪、接触角测定仪、石英晶体微天平和微观驱油模型实验对ICJN在溶液中的聚集形态及其对稠油的乳化、分散能力和降黏性能、驱油性能进行了研究。结果表明:浓度1000 mg/L的ICJN溶液可降低油水间界面张力至10^(-1)m N/m数量级;与水解度25%、黏均相对分子质量1800万的普通部分水解聚丙烯酰胺HPAM相比,ICJN具有较强的增黏能力;对于黏度上万的稠油,在油水体积比为1∶1条件下,浓度1200 mg/L的ICJN可以使混合油水体系黏度降至100 m Pa·s以下,降黏率在95%以上;ICJN具有较强的洗油能力,以沥青质模拟原油重质组分,在SiO_2芯片表面吸附沥青质,浓度1200 mg/L的ICJN溶液作为流动相,解吸附40 min后沥青质的吸附量从489.2 ng/cm^2降至207.4 ng/cm^2,吸附层厚度从4.7 nm降至3.1 nm。ICJN溶液既可以通过扩大波及体积驱油,又可依靠较低的油水界面张力从岩石表面乳化分散剥离原油。微观驱油实验结果显示,浓度1000 mg/L的ICJN体系的驱油效果明显优于等浓度的HPAM体系和1000 mg/L HPAM+3000 mg/L AOS体系。
In view of the heavy oil reservoir, amphiphilic polymer （ICJN） oil displacement agent system, which was suitable for heavy oil exploitation, was designed and synthesized. By scanning electron microscopy （SEM）, fluorescence microscope, spinning drop interracial tensiometer, contact angle meter, quartz crystal micro balances and micro displacement model, aggregation structure of ICJN in solution and the effect of ICJN on the heavy oil emulsification, dispersion ability and the viscosity reduction and oil displacement properties were studied. The results showed that the ICJN solution with the concentration of 1000 mg/L could reduce the oil-water interracial tension to the magnitude order of 10-1 mN/m. The viscosity increasing ability of IC3N was higher than that of the common HPAM with hydrolysis degree of 25% and the viscosity-average molecular weight of 1800x 104. When the volume ratio of the crude oil and water was 1 ： 1,1200 mg/L ICJN solutions could make the viscosity of the mixed oil and water system drop to below 100 mPa- s,meaning that the viscosity reduction rate was more than 95%. Using asphaltene to simulate the heavy components of crude oil and 1200 mg/L ICYN solution as mobile phase, the asphaltene adsorption in the surface of SiO2 chip, decreased from 489.2 ng/cm2 to 207.4 ng/cm2 and the adsorption layer thickness deceased from 4.7 nm to 3.1 nm after desorption for 40 rain, which indicated that ICIN had strong oil sweep ability. ICJN solution displaced the crude oil not only through expanding the sweep volume displacement, but also by emulsifying dispersion crude oil due to low oil-water interracial tension. Experimental results of microdisplacement showed that the oil displacement effect of 1000 mg/L ICJN system was significantly better than that of 1000 rag/ L HPAM system and that of 1000 mg/L HPAM＋3000 mg/LAOS system.
作者
徐晓慧
张健
崔盈贤
杨光
张裴
杨惠
王金本
XU Xiaohui ZHANG Jian CUI Yingxian YANG Guang ZHANG Pei YANG Hui WANG Jinben(Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P R of China State Key Laboratory of Efficient Development of Offshore Oil, Beijing 100028,PR of China CNOOC Research lnstitute,Beijing 100028,PR of China)
出处
《油田化学》
CAS
CSCD
北大核心
2016年第3期456-461,共6页
Oilfield Chemistry
基金
中国海洋石油总公司重大专项"海上稠油热采开发方案设计方法及关键技术研究"(项目编号CCL2013RCPS0184RSN)
关键词
稠油
两亲聚合物
乳化降黏
驱油剂
驱油机理
heavy oil
amphiphilic polymer
emulsification reducing viscosity
oil displacement agent
displacement mechanism
