مطالعه هاي آزمايشگاهي رسوب واكس در خطوط لوله نفت براي بررسي تأثير پارامترهاي متفاوت

Laboratory Study of Wax Precipitation for Investigation of Effective Different Parameters

: As the temperature of oil transfer pipeline walls is reduced to cloud point, wax tends to deposit on internal side of tubes. Wax deposition may be prohibited by mechanical, chemical and thermal methods. As the period of oil recovery proceeds and volumetric flow of oil production decreases, the holding time of oil in pipe would increase, thereby wax deposition may increase. In this research using a designed dynamical set up, the extent of wax deposition was studied for four oil samples (B, C, D, E) provided from Iran reservoirs. The oil samples contain wax weight percent in range of 2-3 %. The result of studies, presents that the discrepancy between fluid temperature and pipe temperature is the most important factor influencing the extent of wax deposition. Increasing the volumetric flow of the fluid leads to expulsion the majority of wax from the fluid, but it decreases the tendency of deposition on pipe surface. The physical properties of the fluid exclusively could not evaluate the amount of deposition and wax deposition is affected by operational conditions too. The deposition issue is not excluded only to wax precipitation; rather the deposit has to be studied from general view considering overall oil constituents.