EFFECTIVNESS OF DEMLUSIFIERS IN BREAKING OFF EMULSION IN CRUDE OIL PRODUCTION

Abstract

This work is aimed to evaluate four chemical demulsifiers (DE1, DE2, DE3, and XY) to break-off emulsion formed in oil wellA54. The active ingredient of demulsifiers (DE1, DE2, and DE3) is alkoxylated resins and high molecular weight polyols in an aromatic solvent. Static jar test is carried out at ambient and production separator temperatures (25°C and 85°C). Emulsion is prepared at mixing ratio of oil (70%) and produced water (30%). The salinity of produced water is changing considerably; chemical demulsifiers are evaluated at low and high salinities. Results showed that temperature plays a significant role in breaking off emulsion. As temperature increases, the rate of oil/water separation rate increases. DE2 showed an optimum effectiveness in breaking off emulsion at 200mg/L. At high saline water (188,727mg/L), emulsion showed less stability comparing with low saline water (33,088mg/L).