Abstract
One of the methods of influence on rheological properties of heavy high-viscosity crude oils is ultrasonic treatment. Ultrasonic treatment allows reducing the viscosity of crude oil and, therefore, reducing the costs of its production and transportation. In this paper, the influence of ultrasonic treatment on the rheological characteristics of crude oil (sample No. 1 API = 29.1, sample No. 2 API = 15.9) was investigated. An experimental method was developed. Experimental studies were carried out using the Physica MCR 102 rheometer. The influence of the intensity and duration of ultrasonic treatment on the viscosity of the initial crude oils was studied for 24 h. In addition, the rheological characteristics of the treated oil were investigated after its natural cooling to 293 K. The results are compared with similar results for thermal heating.
Highlights
In countries with cold climate conditions, extraction and following transportation of oil and oil products is a complicated and complex task
The obtained results indicate that the viscosity reduction mechanism of the oil treated by ultrasound is only due to the thermal effect
The intensity of ultrasonic treatment depends on the initial rheological properties of crude oil
Summary
In countries with cold climate conditions, extraction and following transportation of oil and oil products is a complicated and complex task. Volume of its transportation, and processing increase, the share of high-viscosity oil is steadily increasing in the total volume. In this regard, there are difficulties in the extraction and transportation of oil with such high viscosity, which are caused by their abnormal rheological behavior (Bingham fluids). High wax content crude oil at low temperatures exhibits pronounced non-Newtonian (viscoplastic, viscoelastic, thixotropic) properties; without taking them into account it is impossible to organize the rational operation of wells, gathering, preparation, and transportation of oil [2]
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