Study on Viscoelastic Behaviors of Waxy Crude Water-in-Oil Emulsion
Study on Viscoelastic Behaviors of Waxy Crude Water-in-Oil Emulsion
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DOI：
10.4236/aces.2016.62022
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发表时间：
2016-02
期刊：
影响因子：
--
通讯作者：
Liping Guo;S. Shi;Yu Wang
中科院分区：
文献类型：
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作者：
Liping Guo;S. Shi;Yu Wang
含蜡原油的乳化状态是海底管道中常见的状态之一。在近海环境低温下，含蜡原油与水可形成水包油乳液的原油乳液凝胶。因此，含蜡原油乳状液的粘弹性行为对于深海运输和管道安全重启尤为重要。利用德国公司生产的MASIII HAAKE流变仪，研究了含蜡原油乳液在不同体积含水量和不同剪切应力下的粘弹性行为。通过分析初始剪切速率的变化率，总结了随着体积含水量和施加剪切应力的变化对粘弹特性的影响规律，并根据实验结果从微观层面解释了乳化规律。提出蜡晶体之间存在脆性断裂，而水滴与蜡晶体之间的相互作用则存在柔性断裂。
Emulsion of waxy crude oil is one of the common states in the subsea pipeline. At low temperatures in offshore environment, waxy crude oils with water could form the crude oil emulsion gel of oil-in-water emulsion. Thus, the waxy crude oil emulsion viscoelastic behavior for deep sea transportation and restarting pipeline safety is particularly important. By means of MASIII HAAKE rheometer which is produced by German company, waxy crude oil emulsion viscoelastic behavior is explored at different volumetric water contents and different shear stresses. By analyzing the rate of change of shear rate in the initial stage, the influence rules of viscoelastic properties were summarized, with the change of volumetric water content and the applied shear stress and based on the experimental results, the law of emulsion is explained from the micro level. It is proposed that brittle fracture exists between wax crystals, and flexible fracture was found in the interaction between water droplets and wax crystals.