The delivery of high-viscosity petroleum, which demonstrates significant resistance to pressure, from wells to refineries has long been the cause of energy costs during transportation through pipelines. In order to reduce costs, various methods are used: heating, dilution, ultrasonic effect, emulsification in water. We have investigated the effect of fusel oil on the rheological and physical characteristics of high-viscosity petroleum in order to reduce its viscosity, and as a result, reduce the resistance of the system during transportation through the pipeline. It has been established that the addition of 5-10% fusel oil under certain conditions can increase the petroleum dynamic viscosity. This fact should be taken into account when using the fusel oil fraction alcohols in tracer studies. The petroleum has a lower viscosity in the presence of fusel oil at a temperature of 30 ° C and 40 ° C. Moreover, with an increase in shear stress of more than 10 Pa, an almost linear dependence is observed in the decrease in viscosity for both petroleum and petroleum systems with fusel oil in the range from 5% to 20%. At the same time, the nature of the flow of petroleum systems with fusel oil with a change in shear stress and temperature almost completely corresponds to the behavior of petroleum. In general, given the lower viscosity of fusel oil, the behavior of the systems is logical except for the petroleum system with the addition of 5% fusel oil at a temperature of 30 ° C where the dynamic viscosity was higher than the viscosity of the petroleum in the range of shear stresses up to 10 Pa. Moreover, according to the results of the study, it is unlikely that the systems form eutectics since the pour point of the test petroleum has 29.8 ° C, the pour point of the alcohol fraction of fusel oil is lower than -50 ° C, and the petroleum: fusel oil 80:20 system has 28.8 ° C. The resulting systems remain thixotropic and have a non-Newtonian flow character, that is, paraffins and resinous substances do not form true solutions and eutectics with fusel oil.
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