Izvorni znanstveni članak
https://doi.org/10.17794/rgn.2026.4.15
EVALUATION OF A NEW COMPOSITION FOR ENHANCED DEMULSIFICATION AND DEPOSIT CONTROL IN RESINOUS HEAVY OIL EMULSIONS
Aysel Gasimzade
; Azerbaijan State Oil and Industry University, Departament of Transportation and Storage Oil and Gas, Baku, Azadliq Avenue, 34, AZ1010.
*
Vali Nurullayev
; State Oil Company of the Azerbaijan Republic, Baku, Khojali, Baku, Khatai, AZ1025.
* Dopisni autor.
Sažetak
This study investigates the demulsification performance, deposit formation tendencies, and rheological behaviour of highly resinous crude oils and their blended systems using both an individual demulsifier and a newly formulated laboratory composition. Crude oils X (27% water), Y (32% water), and Z (48% water), along with the mixed emulsions A (31% water) and B (41% water), were examined under various temperatures, reagent dosages, and a demulsification duration of 120 minutes. The individual demulsifier ND-12 and the newly developed W composition were evaluated by determining their optimal dosages and comparing the resulting amounts of residual and ballast water after treatment. Under conditions of 60°C and 120 minutes, the optimal ND-12 dosage was found to be 200 g/t for X, 800 g/t for Y, and 1000 g/t for the highly stable Z emulsion, reducing ballast water to 0.05%, 0.07%, and 0.8%, respectively. Owing to its strong aggregative and kinetic stability, the Z emulsion was also analyzed at 85°C, where the required ND-12 dosage decreased to 750 g/t, and ballast water was reduced fourfold to 0.2%. For the mixed A (X+Z) and B (Y+Z) systems, the optimal ND-12 dosages at 60°C were 1300 g/t and 1100 g/t, achieving ballast water levels of 0.3% and 0.2%, respectively. Compared with individual reagents, the laboratory-prepared W composition showed higher demulsification efficiency, reduced sediment formation related to asphaltenes, resins and paraffins, and a significant decrease in viscosity. The required reagent dosage for treating mixed oil emulsions A and B was reduced by about 2.5 times, while viscosity decreased by approximately six times. In addition, the application of the composition produced a multifunctional inhibiting effect on crude-oil complications by preventing the formation of a structural network of C17–C40 fractions, which are prone to rapid solidification.
Ključne riječi
water-oil emulsion; demulsification; paraffin hydrocarbons; resinous crude oil; deposit
Hrčak ID:
349907
URI
Datum izdavanja:
21.7.2026.
Posjeta: 0 *