Published January 2025, Pg. 31-39
Section: Technique and technology of oil-gas production
UOT: 622.276
DOI: 10.37474/0365-8554/2025-01-31-39
Study of the effect of organic substances on the interphase surface tension of emulsions
A.V. Gasimzade - Azerbaijan State Oil and Industry UniversityThe presented article investigates the stability of crude oil emulsions obtained from wells in two different fields with varying physico-chemical properties. Oil samples from the Muradkhanli and Balakhani fields, operated by the State Oil Company of Azerbaijan, served as the subjects of this study. The demulsification of both oil samples, which differ in their content of high-molecular-weight compounds, was analyzed over intervals of 2, 4, 6, 8, 10, and 12 hours using the static sedimentation method. The amount of residual water in the dispersed phase of the oil was determined.
During the same time intervals, the oil samples were alternately treated with normal hexane and phenol at various concentrations. It was observed that increasing the concentration of normal hexane in the emulsion led to a transition to an aggregated and kinetically stable form. Experimental results indicated that the addition of phenol to the oil samples reduced the surface tension at the water-oil interface, thereby accelerating the demulsification process.
The experiments revealed that the rate of demulsification varies depending on the composition and surface activity of the added organic substances. Particularly, when the oil contains a high concentration of high-molecular-weight compounds, the surface tension is elevated, complicating the separation of the water phase from the oil. The demulsification efficiency of the organic substances added to the Muradkhanli and Balakhani oil samples, as well as the A, B, and C compositions formulated from these substances, was studied in relation to surface tension.
References:
1. Ismayilov G.G., Fataliyev V.M., Iskenderov E.K. Investigating the impact of dissolved natural gas on the flow characteristics of multicomponent fluid in pipelines. Open Physics, 2019, № 17(1), pp. 206-213.
2. Ismayilov G.G., Iskanderov E.Kh., Fataliyev V.M., Gurbanov A.G., Ismayilova F.B. Some aspects for improving the efficiency of the development of gas condensate resources in marine conditions // SOCAR Proceedings, 2023, № 4, pp. 99-105.
3. Iskandarov E.K., Baghirov A.N., Shikhiyeva L.M., Aliyev I. Method for assessing the hydrate formation from a mixture of natural gas flows of varying degrees of moisture content. Nafta – Gaz, 2024, № 8, pp. 39-44.
4. Matiev K.I., Agazade A.D., Keldibayeva S.S. Removal of asphalt-resin and paraffin deposits from various fields // SOCAR Proceedings, 2016, № 4, pp. 64-68.
5. Bakhtizin R.N., Karimov R.M., Mastobayev B.N. Effect of macromolecular components on rheological properties depending on the structural group and fractional composition of oil // SOCAR Proceedings, 2016, № 1, pp. 42-50.
6. Kokal S. In petroleum engineering handbook: general engineering. Richardson, TX: Society of Petroleum Engineering, 2006.
7. Iskandarov E.Kh., Ismayilova F.B., Shukurlu M.F., Ismayilova P.Sh. Changes in energy characteristics of pipeline systems considering hydrodynamic loads // SOCAR Proceedings, 2024, № 2, pp. 105-108.
8. Matiev K.I., Agazde A.R., Alsafarov M.E., Akberova A.F. Selection of an effective demulsifier for an oil-water emulsion breaking and study to determine compatibility with a basic demulsifier // SOCAR Proceedings, 2018, № 1, 075-082, pp. 75-82.
9. Persiansev M.N., Zagorodnev S.M., Kleimenov V.F., Samakaev R.Kh., Lujetski V.P. Experience in the use of reagent-demulsifier “DIN” at Savelievskaya UPSV NGDU “Buzulukneft”// Geology and operation of oil and gas and oil fields of Orenburg region – Orenburg, Orenburg book publishing house, 1999, pp. 259-262.
10. Gafarov N.A., Goncharov A.A., Kushnarenko V.M., Shchipunov D.N., Chirkov Y.A. Failure analysis of facilities and pipelines of Orenburg oil and gas condensate field // Protection of metals, 2003, v. 39, № 3, pp. 328-331.
11. Nebogina N.A., Prozorova I.V., Yudina N.V. Effect of water content in oil on the formation and rheological properties of oil-water emulsions // Journal of Oil industry, 2008, № 12, pp. 90-92.
12. Mukhamadiyev A.A., Notov S.V. The results of pilot tests of demulsifier “Alkioks-516” at the facilities of OJSC “Samotlorneftegaz” // Journal of Oil industry, 2008, № 5, pp. 74-75.
13. Nebogina N.A., Prozorova I.V., Yudina N.V. Effect of water content in oil on the formation and rheological properties of oil-water emulsions // Journal of Oil Industry, 2008, № 12, pp. 90-92.
