Effects of stress and oscillatory frequency on the structural properties of Daqing gelled crude oil at different temperatures

被引：30
|
作者：
Li, Chuanxian [1 ]
Yang, Qinzheng [2 ]
Lin, Mingzhen
机构：
[1] China Univ Petr, Engn Inst Oil Gas Storage & Transportat, Qingdao 266555, Shandong, Peoples R China
[2] Shandong Inst Light Ind, Sch Food & Bioengn, Jinan 250100, Peoples R China
来源：
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING | 2009年 / 65卷 / 3-4期
关键词：
gelled waxy crude oil; structural properties; viscoelasticity; critical linear shear strain; critical linear shear stress; yield stress; yield strain; TRANSITION;
D O I：
10.1016/j.petrol.2008.12.018
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The structural properties of Daqing gelled waxy crude oil were studied with a controlled-stress rheometer under oscillatory shear mode. Our results demonstrate that the gelled waxy crude oil shows viscoelastic properties. The linear viscoelastic region and yielding of crude oil can be determined not only by the critical linear shear stress (tau(cl)) and yield stress (tau(y)), but also by the critical linear shear strain (gamma(cl)) and yield strain (gamma(y)) respectively. With the decrease of test temperature, tau(cl) and tau(y) increased greatly while gamma(cl) and gamma(y) decreased gradually. The crude oil showed more elastic at lower temperatures. The frequency had little effect on the structure of crude oils in the measured range. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：167 / 170
页数：4
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