Effect of asphaltene stabilizer on demulsification of asphaltene-stabilized emulsions

The effect of asphaltene stabilizer on demulsification of asphaltene-stabilized emulsions was studied.It was found that the asphaltene stabilizer AS-1 showed no distinct demulsification effect on both asphaltic base crude and non-asphaltene crude when used without demulsifier,but when used together with demulsifier AE8031,synergy giving improved demulsification was observed.With the increase of AS-1,the synergy between demulsifier and AS-1 became larger,but got level when its dosage reached to 12.5 mg/L.Additionally,the water content in the emulsion used had significant effect on the synergy between demulsifier and AS-1,lower water content was good for the synergy to take effect.