Heavy crude oil viscosity reduction and rheology for pipeline transportation

Shadi W. Hasan, Mamdouh T. Ghannam, Nabil Esmail

Research output: Contribution to journalArticlepeer-review

374 Citations (Scopus)


Different methods of reducing the viscosity of heavy crude oil to enhance the flow properties were investigated. Experimental measurements were conducted using RheoStress RS100 from Haake. Several factors such as shear rate, temperature and light oil concentration on the viscosity behavior have been studied. This study shows that the blending of the heavy crude oil with a limited amount of lighter crude oil provided better performance than the other alternatives. Experimental measurements in terms of shear stress τ-shear rate over(γ, ̇), and yield stress τ0 were conducted on the mixture of heavy crude oil-light crude oil (O-light). The results showed a significant viscosity reduction of 375 mPa s at a room temperature of 25 °C. This study shows that the heavy crude oil required a yield stress of 0.7 Pa, whereas no yield stress was reported for the heavy crude oil-light crude oil mixture.

Original languageEnglish
Pages (from-to)1095-1100
Number of pages6
Issue number5
Publication statusPublished - May 2010


  • Alcohol
  • Heavy crude oil
  • Oil/water emulsion
  • Viscosity reduction
  • Yield stress

ASJC Scopus subject areas

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry


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