2016_EJRNL_PP_AMIR_HOSSEIN_SAEEDI_DEHAGHANI_1.pdf
Terbatas  Suharsiyah
» Gedung UPT Perpustakaan
Terbatas  Suharsiyah
» Gedung UPT Perpustakaan
Due to the high viscosity of heavy crude oils, production from these reservoirs is a demanding task.
To tackle this problem, reducing oil viscosity is a promising approach. There are various methods to
reduce viscosity of heavy oil: heating, diluting, emulsification, and core annular flow. In this study,
dilution approach was employed, using industrial solvents and gas condensate. The viscosity of two
Iranian heavy crude oils was measured by mixing with solvents at different temperatures. Dilution
of both oil samples with toluene and heptane, resulted in viscosity reduction. However, their effect
became less significant at higher concentrations of diluent. Because of forming hydrogen bonds,
adding methanol to heavy crude oil resulted in higher viscosity. By adding condensate, viscosity of
each sample reduced. Gas condensate had a greater impact on heavier oil; however, at higher
temperatures its effect was reduced. Diluting with naphtha decreased heavy oil viscosity in the
same way as n-heptane and toluene. Besides experimental investigation, different viscosity models
were evaluate