刘刚,刘士元,陈雷,滕厚兴,陈放,卢兴国

• 1:中国石油大学(华东) 山东省油气储运安全省级重点实验室，山东 青岛 266580

摘要(Abstract)：

胶凝原油的蠕变特性对保障管道安全流动具有重要意义。现有蠕变模型在不同剪切应力下的拟合参数显著不同，不便工程应用。为此，研究从流变参量的非定常化角度出发，对经典Maxwell模型进行扩展，利用求解微分型本构关系的方法建立非定常参量蠕变模型。利用三种胶凝原油对蠕变模型进行验证，结果表明：一个蠕变方程即可较好地描述油品在多个应力下的蠕变过程，拟合精度高，模型未知参数少，且拟合参数不随剪切应力变化。油品温度降低，胶凝原油黏弹性增强，模型拟合参数呈现单调变化趋势。借助拟合确定的模型参数对胶凝原油其它应力下的蠕变响应进行预测，预测结果与试验结果较为一致，表明模型具有良好的工程应用价值。

关键词(KeyWords)： 胶凝原油;蠕变模型;非定常参量;黏弹性;应变预测

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51574274，51704319，51774315）；中国博士后科学基金（2016M602225）；山东省优秀中青年科学家科研奖励基金（2014BSE28055）。

作者(Author): 刘刚,刘士元,陈雷,滕厚兴,陈放,卢兴国

DOI: 10.3969/j.issn.1003-9015.2018.02.012

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