Determination of the optimal concentration of depressor additives Difron-3970 and Difron-4201 in various oil mixtures

Oil samples prepared in 1:1, 1:2, and 2:1 ratios from wells No. 680 and 690 of the Narimanov OGR, SOCAR, were used as research objects in this study. The results showed that increasing the concentration of the reagents enhances their efficiency. The highest efficiency of the depressor additive Difron-3970 in all three ratios was observed at a concentration of 1000 g/t, reducing the freezing points of the oil mixtures to –70C, –60C, and –40C, respectively. The performance of the Difron-4201 reagent varied depending on the medium: the highest efficiency was recorded at a concentration of 1000 g/t for the 1:1 mixture of well No. 680 and No. 690, lowering the freezing point to –80C. However, in the other two mixtures, the highest efficiency was observed at a concentration of 800 g/t, with the freezing points reaching –90C for the 1:2 mixture and –70C for the 2:1 mixture. The greatest effect of the Difron-3970 additive was observed at 1000 g/t for the 1:1 mixture, reducing the freezing temperature from +120C to –70C. In contrast, Difron-4201 exhibited the highest efficiency at 800 g/t in the 1:2 mixture, lowering the freezing point to –90C.