Published December 2020, Pg. 30-35

Section: Technique and technology of oil-gas production

UOT: 622.72

DOI: 10.37474/0365-8554/2020-12-30-35

Study the impact of Difron 4201 depressor additive on formation of paraffin deposition in laboratory conditions

G.R. Gurbanov - Azerbaijan State University of Oil and Industry

M.B. Adygozelova - Azerbaijan State University of Oil and Industry

S.F. Ahmadov PhD in Tech. Sc. - Azerbaijan State University of Oil and Industry

S.M. Pashayeva - Azerbaijan State University of Oil and Industry

The impact of Difron 4201 depressor additive on the asphaltene deposits on metallic surface has been studied for the first time in laboratory conditions via "coldfinger" method. The experiments were carried out in various temperatures of "coldfinger” and different concentrations of Difron 4201 depressor additive. The experiment lasted 3 hours. The amount of deposited paraffin in different times (0, 20, 40, 60, 80, 100, 120 minutes) on the coldfinger surface was specified via the analytical balance and it was defined that with decreasing temperature of the coldfinger the amount of oil sediments on the surface increases and the intensity of deposition decreases by time, and stabilizes after 120 minutes.

As a result of the mass dependence of asphaltene deposits on the concentration of depressor additive, it was defined that with increasing concentration of the additive in the oil, the amount of deposits decreases and in the 900 g/t concentration, the maximum level of deposit reduction is observed. 

The efficiency of depressor additive and the maximum percentage of paraffin sediments on coldfinger surface has been estimated based on the obtained results of experiments. The highest effect was observed in the concentration of
900 g/t concentration of Difron 4201 depressor additive (85 %). Depending on the temperature of coldfinger the maximum percentage of paraffin sediments on the coldfiner surface was equal to 0 оC – 12.8, 5 оC – 9.16, 10 оC – 6.76, 15 оC – 5.82,  20 оC – 5.04, 25 оC – 2.96, 30 оC – 1.63.

References:

1. Olenov L.M., Mironov T.P. Primenenie rastvoriteley i ingibitorov dlya preduprezhdeniya obrazovaniya ASPO. – M.: VNIIOENG, 1994, 32 s.

2. Santanna V.C., Silva A.C.M., Lopes H.M., Sampaio Neto F.A.  Microemulsion flow in porous medium for enhanced oil recovery // Journal of Petroleum Science and Engineering, 2013, v. 105, No 5, 116 p.

3. Gubin V.E., Gubin V.V. Truboprovodniy transport nefti i nefteproduktov. – M.: Nedra, 1982, 296 s.

4. Ivanova L.V. Udalenie asfal´tosmoloparafinovykh otlozheniy raznoy prirody // Neftegazovoe delo, 2011, No 2, s. 257-270.

5. Shadrina P.N. Metodicheskie aspekty obespecheniya fazovoy stabil´nosti neftepromyslovykh flyuidov pri dobyche, transportirovke i podgotovke nefti // Neftegazovoe delo, 2015, No 6, s. 218-233.

6. Jennings D.W. Effect of shear and Temperature on WOX Deposition Cold finger investigation with a Gulf of Mexico Crude Oil / K.Weispfenning // Energy. Fuels, 2005, No 19, pp. 1376-1386.

7. Glushchenko V.N. Otsenka effektivnosti ingibitorov asfal´tenosmoloparafinovykh otlozheniy // Neftyanoe khozaistvo, 2007, No 5, s. 84-87.

8. Meclaflin G.G. Control of paraffin deposition in production operation / D.L.Whitfill // JPT.1984, v. 36, No12, pp. 1965-1970.

9. Mammedov K.A., Hamidova N.S., Aliyev S.T. Development of a multifunctional corrosion inhibitor, possessing the properties of a microemulsion // News the national academy of sciences of the republic of Kazakhstan series of geology and technical sciences. 1.439:64, 2020, p. 72. https://doi.org/10.32014/2020.2518-170X.8