摘要
在模拟油藏环境(矿化度约为13500 mg·L-1,80℃)研究了抗高温磺酸型水溶性降黏剂SR在降低水/原油界面张力及稳定乳状液的能力。实验结果表明:当降黏剂SR质量分数为0.3%时即可将界面张力降至10-2 mN·m-1数量级,有效稳定稠油乳状液并实现良好的降黏效果。通过研究降黏剂SR与不同质量分数胶质沥青质原油的界面张力,得出了胶质沥青质质量分数越高,SR界面吸附越好,降黏率越高的结论。与十二烷基磺酸钠对比发现,SR分子结构中的苯环结构在稳定稠油乳液的过程中起到了关键性作用。分子动力学模拟结果验证了抗高温磺酸型降黏剂SR的苯环结构与胶质沥青质间的π子结相互作用是其对稠油高效降黏的关键因素。
The ability of a high-temperature resistant sulfonate water-soluble heavy oil viscosity reducer SR in decreasing interfacial tension(IFT)and stabilizing crude oil emulsion under the simulated reservoir condition(salinity 13500 mg·L-1,80℃)was investigated.It was found that 0.3%SR could effectively reduce the IFT to 10-2 mN·m-1 order of magnitude,leading to stable emulsion and low viscosity of heavy oil.By studying the interfacial tension between SR and crude oil with different content of resin/asphaltene,the relationship between resin/asphaltene and SR adsorption at the interface was demonstrated.Compared with SDS,it was found that the benzene ring structure in SR played a key role in stabilizing the heavy oil emulsion.Molecular dynamics simulation results verified that theπ-πinteraction between the benzene ring structure of SR and resin/asphaltene was a crucial factor for the excellent performance of SR.
作者
刘义刚
王秋霞
吴婷
王弘宇
张华
王曼依
曹杰
LIU Yi-gang;WANG Qiu-xia;WU Ting;WANG Hong-yu;ZHANG Hua;WANG Man-yi;CAO Jie(CNOOC Tianjin Branch,Tianjin 300459,China;CNOOC Energy Development Co.,Ltd.Engineering Technology Branch,Tianjin 300452,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China)
出处
《当代化工》
CAS
2020年第10期2255-2259,共5页
Contemporary Chemical Industry
基金
“中海石油(中国)有限公司重大项目,渤海油田3000万吨持续稳产关键技术研究”课题四“稠油规模化热采有效开发技术”(项目编号:CNOOC-KJ135ZDXM36TJ04TJ)
关键词
稠油
胶质沥青质
降黏剂
界面活性
乳状液
耐高温
Heavy oil
Resin and asphaltene
Viscosity reducer
Interfacial activity
Emulsion
High-temperature resistance
作者简介
刘义刚(1969-),男,教授级高级工程师,博士,2013年毕业于西南石油大学油气田开发工程专业,研究方向:采油工艺技术。电话:022-66501176,E-mail:liuyg@163.com。
