超稠原油的流变学特性及流动特征研究

发布时间：2018-01-17 22:12

本文关键词：超稠原油的流变学特性及流动特征研究　出处：《水动力学研究与进展A辑》2016年02期 　论文类型：期刊论文

【摘要】：该文针对三种不同类型的超稠原油的触变性、屈服应力和黏弹性等开展了研究工作。实验首先采用Haake RS6000旋转流变仪进行了流变学测试,结果表明随温度的上升,超稠原油的黏度、触变性和屈服应力均呈现出指数衰减的趋势;超稠原油表现出明显的黏弹性性质,且随频率的增大,样品从黏性主导转变成弹性主导。室内管道流动实验中,分别考虑温度、流速等因素研究了原油管道输运时的启动应力和流动规律,并将管流的测试结果与流变仪测量数据进行了对比分析,采用流变仪得到的在低剪切速率区间的流变学参数可以很好地应用于高剪切速率区的管道流动中。
[Abstract]:In this paper, the thixotropy, yield stress and viscoelasticity of three kinds of ultra-thick crude oils are studied. Firstly, the rheological tests are carried out with Haake RS6000 rotary rheometer. The results show that the viscosity, thixotropy and yield stress of super thick crude oil decrease exponentially with the increase of temperature. The ultra-thick crude oil shows obvious viscoelastic property, and with the increase of the frequency, the sample changes from the viscosity leading to the elastic dominant. In the indoor pipeline flow experiment, temperature is taken into account respectively. The starting stress and flow law of crude oil pipeline are studied by flow rate and other factors, and the measured results of pipeline flow are compared with the measured data of rheometer. The rheological parameters obtained by the rheometer in the low shear rate range can be well applied to the pipe flow in the high shear rate region.
【作者单位】：中国科学院力学研究所;
【基金】：国家重大科学仪器设备开发专项“水下油气水高效分离与计量装置”(2011YQ120048-02)~~
【分类号】：O35
【正文快照】： 引言原油总体上可以分为流动性较好的轻质原油和流动性较差的高黏原油。高黏原油又包括含蜡原油、稠油和超稠原油等,其普遍具有密度大、黏度高等物理特性,给开采、生产和管道输运等环节带来难度[1,2]。针对原油流变学特性的研究,张劲军等[3]给出了含蜡原油宏观流变性与原油组

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