2015 EJRNL PP MAHDI ZEINALI HASANVAND 1.pdf
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Terbatas Suharsiyah
» ITB
Terbatas Suharsiyah
» ITB
Precipitation of heavy hydrocarbon components such as Wax and Asphaltenes are one of the most
challenging issues in oil production processes. The associated complications extend from the
reservoir to refineries and petrochemical plants. Precipitation is most destructive when the affected
areas are hard to reach, for example the wellbore of producing wells. This work demonstrates the
effect of adjusting choke valve sizes on thermodynamic parameters of fluid flowing in a vertical
well. Our simulation results revealed optimum choke valve sizes that could keep producing vertical
wells away from Asphaltene precipitation. The results of this study were implemented on a well in
Darquin Reservoir that had been experiencing asphaltene precipitation. Experimental analysis of
reservoir fluid, Asphaltene tests and thermodynamic simulations of well column were carried out
and the most appropriate size of choke valve was determined. After replacing the well's original
choke valve with the suggested choke valve, the Asphaltene precipitation problem diminished