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首页> 外文期刊>Fuel >Viscoelastic models for Mexican heavy crude oil and comparison with a mixture of heptadecane and eicosane. Part Ⅱ
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Viscoelastic models for Mexican heavy crude oil and comparison with a mixture of heptadecane and eicosane. Part Ⅱ

机译：墨西哥重质原油的粘弹性模型，并与庚烷和二十烷的混合物进行比较。第二部分

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摘要

The viscoelastic properties of crude oils, at a fixed temperature, can be interpreted in terms of a distribution of relaxation times. A square relaxation spectrum applied to the Maxwell model is in accordance with experimental results obtained for a crude oil specimen from the Cantarell reservoir in south-east Mexico. As a continuation of a previous paper, the Weissenberg number formerly proposed for steady viscosity, is also proposed to scale G' and G" at different temperatures. Although, the mixture of n-heptadecane and n-eicosane provided good results in the description of viscous properties of the considered crude oil - as reported in the previous paper - the viscoelastic properties of the mixture of n-heptadecane and n-eicosane are very poor in comparison to those of crude oil. In general, aging of crude oil causes an increment of tan δ quicker with temperature increment. Moreover, two years of aging cause a huge increment of G'. The main objective of this paper is providing a suitable and complete model to describe the viscoelastic properties of the considered crude oil.
机译：在固定温度下，原油的粘弹性能可以用弛豫时间的分布来解释。麦克斯韦模型的平方弛豫谱与从墨西哥东南部坎塔雷尔油藏获得的原油样本的实验结果一致。作为以前论文的延续，以前提出的Weissenberg数用于稳定粘度，还提出了在不同温度下对G'和G“进行标度。尽管，正十七烷和正二十烷的混合物在描述如先前论文所述，所考虑的原油的粘滞特性与原油相比，正十七烷和正二十烷的混合物的粘弹性很差，一般来说，原油的老化会增加原油的粘度。随着温度的升高，tanδ的变化更快，而且，两年的老化导致G'的巨大增加，本文的主要目的是提供一个合适而完整的模型来描述所考虑的原油的粘弹性。

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