A new approach to model strain change of gelled waxy crude oil under constant stress |
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| Authors: | Lei Hou Changyu Song Wei Yan Ze Zhang |
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| Institution: | 1. National Engineering Laboratory for Pipeline Safety/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum (Beijing), 102249, Beijing, People’s Republic of China
2. Department of Chemistry, Technical University of Denmark, 2800 Kgs., Lyngby, Denmark
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| Abstract: | Deformation of gelled waxy crude oil with loaded stress is worthy of research for the flow assurance of pipelining system. A dispersion parameter was introduced to characterize the disruption degree of wax crystal structure in crude oil with shear action. Based on fractional calculus theory, a rheological model incorporating dispersion parameter was proposed to describe creep of gelled waxy crude. A discrete and numerical algorithm was proposed to solve the model. Combining with the experimental results of five kinds of waxy crude oil, the model parameters were regressed and found to change monotonously with test temperature. Multiple creep curves of gelled waxy crude oil at a certain temperature can be described with this model. |
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