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Experimental Investigation of Rheological Behavior and Wax Deposition of Waxy Oil–Disulfide Oil Systems

  • Mojtaba Mansourpoor
  • Reza AzinEmail author
  • Shahriar Osfouri
  • Amir Abbas Izadpanah
  • Rahmatallah Saboori
Original Paper
First Online:

Abstract

In this work, we studied the feasibility of using disulfide oil (DSO) as a solvent for wax prevention in pipelines. Several tests were carried out to determine the effects of DSO, ethylene-vinyl acetate (EVA), acetone, and p-xylene and their mixtures on wax appearance temperature (WAT), deposition mass, and rheological properties of oil samples. The WAT was determined from viscosity in the temperature range of 2–40 °C with 1 °C min−1 cooling rate. Viscoelastic modulus of different samples was measured at temperature intervals of 25–65 °C with 0.5 °C min−1 cooling rate. Results indicated that DSO has a good potential for reducing WAT and wax deposition mass; however, increasing DSO concentration to higher than 800 ppm did not show a significant effect on deposition reduction. It was found that a mixture of inhibitors had higher impact on reducing wax deposition. Using 800 ppm of EVA–DSO–acetone mixture resulted in deposition mass reduction to about 35.74%. It was found that the strong original gel network was considerably weakened by addition of DSO.

Keywords

Waxy oil Disulfide oil Wax deposition Rheological behavior Cold finger 
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Copyright information

© International Association for Mathematical Geosciences 2019

Authors and Affiliations

  1. 1.Chemical Engineering Department, Faculty of Petroleum, Gas and Petrochemical EngineeringPersian Gulf UniversityBushehrIran
  2. 2.Petroleum Engineering Department, Faculty of Petroleum, Gas and Petrochemical EngineeringPersian Gulf UniversityBushehrIran

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