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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (3): 363-366. 上一篇    下一篇

研究论文

原油溶胶-凝胶等温转变过程中的流变性研究

李传宪;张春光;孙德罕;李琦瑰   

  1. 山东大学;石油大学（华东）储运工程学院
  • 发布日期:2003-03-15

Study on the Rheological Properties of Crude Oil in Sol-gel Transition at Constant Temperature

Li Chuanxian;Zhang Chunguang;Sun Dejun;Li Qigui   

  1. Key Laboratory for Colloid & Interface Chemistry of the State Education Ministry,Shandong University;College of Oil Storage and Transportation,University of Petroleum(East China)
  • Published:2003-03-15

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被引次数

38 | 6

使用RS75流变仪，采用小振幅振荡剪切方法和稳态剪切方法对含蜡原油在溶胶 -凝胶等温转变过程中的流行了研究．结果表明，等温转变成的凝胶原油的结构在 很大程度上决定于预剪切速率，非牛顿含蜡原油在结构恢复过程中表现出不可逆的 触变特性．而凝胶原油在外力作用下向溶胶状态转变的过程中，要经历从线性粘弹 性变形，到非线性粘弹性变形，再到结构屈服的过程，且高剪切应力下的溶胶原油 结构与预剪切速率无关．

关键词: 原油, 溶胶-凝胶法, 流变性质, 剪切, 粘弹性

The rheological properties of waxy crude oil in sol-gel transition at constant temperature have been studied with rheometer RS75 in the modes of small amplitude oscillatory shearing and steady shearing. The recovered structures of the crude oil gel including equilibrium structures in rest are dependent on the pre-shear rates to a great extent. In the transition of gel to sol, the crude oil gel first shows linear visco-elastic behavior, then nonlinear visco-elastic behavior, and finally yielding property.

Key words: CRUDE OIL, SOL-GEL PROCESS, RHEOLOGICAL PROPERTY, SHEAR, VISCOELASTICITY

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