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针对海上油田重质原油SP复合驱采出液多功能破乳剂的合成和应用进行了研究.以聚醚BH-51与丙烯酸酯化反应得到具有C=C结构的YE化合物,在YE中引入阴离子基团—SO3-可以降低沥青质间的结合强度,从而降低界面强度;引入阳离子基团—NH4+可以中和原油-水界面的负电荷使扩散层变薄.优化合成条件得到FC新型高效破乳剂,通过超声波和电场对重质原油SP复合驱采出液进行强化破乳,在驱油剂质量浓度为400～1 600 mg/L条件下,原油含水量小于1％,脱出水中油的质量浓度都小于35.0 mg/L,可显著缩短破乳时间和减少设备体积,适应高驱油剂浓度下重质原油复合驱采出液快速破乳的要求.“,”The multi-functional demulsifiers are synthesized and applied to treat the SP flooding produced fluid of heavy crude in offshore oil field.YE compounds with C =C structure are obtained through esterification by using BH-51 and AA as raw materials.Anionic —SO3-group is introduced to reduce the binding strength between asphaltenes and the resultant interlace strength.Cationic —NH4+ group is incorporated to neutralize the negative charges at the oil-water boundary surface and get a thinner layer.The optimal and efficient demulsifier is then used to treat the SP flooding produced liquid under electro-ultrasonic condition.The water content in the resulting separated oil is less than 1％ and the oil content in the separated water is less than 35.0 mg/L,when the concentrations of oil displacement agent is in the range of 400-1 600 mg/L.This synthesized demulsifier not only shortens the de-emulsification time,reduces equipment size,but also meets the requirement for rapid de-emulsification of SP flooding produced liquids of heavy crude with high content of oil displacement agent.