A new approach to model strain change of gelled waxy crude oil under constant stress

Lei Hou, Changyu Song, Wei Yan, Ze Zhang

Research output: Contribution to journalJournal articleResearchpeer-review

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.
Original languageEnglish
JournalRheologica Acta
Volume53
Issue number4
Pages (from-to)349-356
ISSN0035-4511
DOIs
Publication statusPublished - 2014

Keywords

  • Dispersion
  • Wax crystal
  • Fractional calculus
  • Rheological model
  • Creep

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