The dehydrated efficiency of Daqing crude oil was not stable which caused serious environmental pollution. Therefore, PRJ-1 bio-demulsifier was selected and combined with chemical demulsifiers SP-169 and GT-D01, respectively, to resolve the crude oil emulsion of Daqing. The results show that PRJ-1 can combine with SP-169 efficiently. The demulsifying speed was higher and dehydrated water was clearer. However, the de-mulsifying speed increased a little with GD-D01. The study shows that efficient synergetic effect between PRJ-1 and SP-169 is confirmed which can meet requirement of oilfield demulsifiers currently.%大庆油田原油脱水效率不稳定,环境污染严重,为此,选用PRJ-1生物破乳乳剂与化学破乳剂SP-169和GT-D01复配,对大庆原油进行破乳实验.结果PRJ-1能很好地与SP-169复合破乳,破乳速率快、脱出水清澈；而与GT-D01复合,破乳效率提高不明显.通过实验表明,PRJ-1生物破乳剂与SP-169化学破乳剂具有良好的协同作用,能够满足目前油田对破乳剂的要求.
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