ANALYSIS OF DEPOSITION FROM PARAFFIN-SOLVENT MIXTURES UNDER TURBULENT FLOW

Y. K. P. G. Aum, P. T. P. Aum, J. L. C. Fonseca, E. L. Barros Neto, A. A. Dantas Neto, T. N. C. Dantas

Abstract


Paraffin deposition is a common problem in the flow of paraffinic and heavy oils. Solids deposition in the pipe wall results in rising process costs due to an increase in energy cost of pumping, a decrease in production, an increase in pressure on the line and risk pipeline blockage. In this work, a simulator was developed to allow the analysis of paraffin deposition under different operating conditions, to understand the influence of the variables (inlet and external temperatures, wax appearance temperature, composition, and time) on paraffin deposition under turbulent flow. A mathematical model for quantitative prediction of wax deposition for paraffin-solvent mixtures was proposed. The methods used in the estimation of physical, thermal, and transport properties of mixtures were suitable when compared with literature data. The simulator calculated the profiles of temperature and thickness of the deposit, with consistent results. The results showed the important role of operating temperatures in paraffin deposition.

Keywords


simulation; paraffinic deposits; petroleum; modeling; flow assurance

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DOI: http://dx.doi.org/10.5419/bjpg2016-0002