Chemical study of asphaltene inhibitors effects on asphaltene precipitation of an Iranian oil field
Chemical Engineering Department, Ilam University, P.O. Box 69315/516, Ilam, Iran
2 Petroleum Engineering & Development Company (PEDEC), 1598846511 Tehran, Iran
3 Department of Petroleum Engineering, School of Chemical and Petroleum Eng., Shiraz University, 7134851154 Shiraz, Iran
* Corresponding author: firstname.lastname@example.org
Accepted: 4 December 2019
The amount of precipitated asphaltene can be considerably reduced with pretreatment of asphaltene inhibitor, in the crude oil. Efficiency of asphaltene inhibitors mainly depends on some parameters such as pH of the oil and the chemical structure of asphaltene inhibitors. In this paper, the amounts of asphaltene precipitation have been experimentally measured using two n-paraffin precipitants; n-heptane and n-hexane. The performance of the studies on the asphaltene accumulation was studied using Fourier-Transform Infrared (FTIR) Spectroscopy analysis. The onset point has been determined by three different commercial asphaltene inhibitors. The results show that when an asphaltene inhibitor is not injected into the mixture of synthetic oil/n-heptane, AOP (Asphaltene Onset Point) occurs at 35 vol.% of n-heptane, while with addition of 3000 ppm of asphaltene B inhibitor, AOP occurs at 60 vol.% of n-heptane.
© A. Ahmadbaygi et al., published by IFP Energies nouvelles, 2020
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