西南石油大学学报(自然科学版)

• 本期导读 • 上一篇    下一篇

稠油氧化自生表面活性剂乳化降黏实验研究

崔盈贤1,2,唐晓东3,李晶晶3,苏旭4,赵文森1,2   

  1. 1. 中海油研究总院,北京东城100027;2. 海洋石油高效开发国家重点实验室,北京东城100027;
    3. 西南石油大学化学化工学院,四川成都610500;4. 南充农产品质量监测检验中心,四川南充637000
  • 出版日期:2013-06-01 发布日期:2013-06-01
  • 作者简介:崔盈贤,1979 年生,男,汉族,山 东潍坊人,工程师,博士,主要 从事提高采收率及化学降黏 方面研究工作。E-mail:cuiyxian@ yahoo.com.cn 唐晓东,1963 年生,男,汉族,四川 平昌人,教授,主要从事稠油开采、 油气加工等方面的科研和教学工 作。E-mail:txd3079@163.com 李晶晶,1982 年生,女,汉族,河 南洛阳人,讲师,博士,主要从 事稠油开采、石气加工等方面 的科研和教学工作。E-mail:lijingjing771216@ gmail.com 苏旭,1979 年生,男,汉族,四川 巴中人,主要从事实验分析工作。 E-mail:suxcat@126.com 赵文森,1980 年生,男,汉族,重 庆人,工程师,主要从事油田提 高采收率方面研究工作。E-mail: zhaows@cnooc.com.cn
  • 基金资助:

    国家科技重大专项“海上稠油热采增效机理及方法研究”(2011ZX05024–005–008)。

Experimental Study on Reducing Viscosity by Emulsification of
Surfactants from Heavy Oil Oxidation

Cui Yingxian1,2, Tang Xiaodong3, Li Jingjing3, Su Xu4, Zhao Wensen1,2   

  1. 1. CNOOC Research Institute,Dongcheng,Beijing 100027,China
    2. State Key Laboratory of Offshore Oil Exploitation,Dongcheng,Beijing 100027,China
    3. School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    4. Nanchong Municipal Monitoring and Testing Center for Agricultural Product Quality,Nanchong,Sichuan 637000,China
  • Online:2013-06-01 Published:2013-06-01

摘要:

以渤海稠油为原料,研究了空气低温催化氧化对稠油组成和性质的影响;并抽提分离出氧化稠油中石油羧
酸,制成石油羧酸盐,评价其乳化性能;最后以稠油氧化程度、乳化助剂加量、含水率和乳化温度考察了助剂作用下氧
化稠油的乳化性能。实验结果表明:稠油经空气低温催化氧化72 h 后,沥青质+ 胶质下降了4.4%,相对平均分子质量
减小5.18%,氧化对稠油起到了一定的改质作用;同时稠油酸值由氧化前的2.78 mgKOH/g 增长到5.05 mgKOH/g;石
油羧酸盐能形成较低的油/水界面张力,具有良好的乳化效果,稠油经空气低温催化氧化后,在复合乳化助剂作用下产
生自生表面活性剂,形成水包油型乳液体系达到乳化降黏,降黏率达92% 以上。

关键词: 稠油, 氧化, 乳化, 自生表面活性剂, 降黏

Abstract:

The effects of air-injection catalytic oxidation at low temperature on the composition and properties of the Bohai Sea
heavy oil were investigated in the paper. And the capability of emulsification of petroleum carboxylate produced by petroleum
carboxylic acids which were extracted from oxidized heavy oil was evaluated. The effects of many parameters such as degree
of heavy oil oxidation,the dosage of texture modifier,water ratio and the temperature of emulsification on the capability of
emulsification of oxidized heavy oil were studied,and results were obtained by air-injection catalytic oxidation at low temperature
for 72h. The results indicate that the content of resins and asphaltene in heavy oil decreased by 4.4%,and the relative
average molecular mass also decreased by 5.18%. So oxidation had certain influence on modification of heavy oil behavior,
and the acid value of heavy oil increased from 2.78 mg KOH/g to5.05 mg KOH/g. Due to lower O/W interfacial tension,
petroleum carboxylate has good emulsification effect. Heavy oil generated autogenous surfactant under the action of compound
texture modifier by air-injection catalytic oxidation at low temperature,and formed O/W emulsion system to achieve emulsified
viscosity reduction,the viscosity reduction ratio reaching above 92%.

Key words: heavy oil, oxidation, emulsification, autogenous surfactant, viscosity reduction