原油溶胶-凝胶等温转变过程中的流变性研究  

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

作　　者：李传宪[1] 张春光[1] 孙德军[1] 李琦瑰[2] 

机构地区：[1]山东大学胶体与界面化学教育部重点实验室,济南250100 [2]石油大学(华东)储运工程学院,东营257061

出　　处：《化学学报》2003年第3期363-366,共4页Acta Chimica Sinica

摘　　要：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变性进行了研究 .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 。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.

关 键 词：等温转变过程 含蜡原油 溶胶 凝胶 流变性 储能模量 结构 

分 类 号：TE311[石油与天然气工程—油气田开发工程]