Yielding characteristics of gelled Daqing crude oil on different stress loading time

被引：0

作者：

Peng, Jian-Wei ^{[1
]}

Han, Shan-Peng ^{[1
]}

Zhang, Jin-Jun ^{[1
]}

Hou, Lei ^{[1
]}

机构：

[1] Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2008年 / 32卷 / 04期

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摘要：

In order to acquire the relationship between the yielding of gelled Daqing crude oil and stress loading time, the control stress rheometer (Haake RS-150) was used, with the shear stress loading in three different ways: constant, ramp and stepwise sequence. The results show that the yielding of gelled Daqing crude oil closely depends on the loading time of shear stress. The yielding is the result of the accumulation of deformation with time. The yield stress of gelled crude oil decreases with the increase of time duration of shear stress at each level, but the time needed for yielding is prolonged. The values of shear stress and time duration complement each other, and either the low shear stress with long time duration or the high shear stress with short time duration can lead to the yielding of gelled crude oil in a range. For the shear stress loading in a stepwise way, the yield stress decreases exponentially with the increase of time duration in each step, and the yielding time increases linearly with the time duration increasing in each step in log-log scale coordinates.

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页码：109 / 113