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

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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.

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Authors and Affiliations

  1. Chemical Engineering Department, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, Iran

    Mojtaba Mansourpoor, Shahriar Osfouri, Amir Abbas Izadpanah & Rahmatallah Saboori

  2. Petroleum Engineering Department, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, Iran

    Reza Azin

Authors
  1. Mojtaba Mansourpoor
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  2. Reza Azin
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  3. Shahriar Osfouri
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  4. Amir Abbas Izadpanah
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  5. Rahmatallah Saboori
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Correspondence to Reza Azin.

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Mansourpoor, M., Azin, R., Osfouri, S. et al. Experimental Investigation of Rheological Behavior and Wax Deposition of Waxy Oil–Disulfide Oil Systems. Nat Resour Res 28, 1609–1617 (2019). https://doi.org/10.1007/s11053-019-09454-z

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  • DOI: https://doi.org/10.1007/s11053-019-09454-z

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