Polymer has a certain negative effect on the demulsification, but if the polymer mass concentration is less than 300 mg/L,the influence is little;when the polymer content is more than 300 mg/L, the higher polymer mass concentration is, the lower crude oil dehy-dration rate will be. According to the characteristics of fluid produced from tested well, lab-oratory simulation experiments were carried out to screen demulsifiers for fluid produced from polymer flooding and to optimize the formulation. Demulsifier 8911 was developed, the de-mulsifying efficiency of which was significantly better than that used now in the field. The crude oil dehydration temperature can be lowered from 35~60 ℃ to 30 ℃, the demulsifier concentration from 70~100 mg/L down to 30 mg/L.%聚合物的存在对破乳具有一定的负面影响,但当聚合物质量浓度小于300 mg/L时,影响不大;在聚合物浓度大于300 mg/L后,聚合物浓度越高,原油的脱水率越低.根据现场试验井采出液特点,通过室内模拟实验开展了聚合物驱采出液破乳剂的筛选和配方优化,研制出聚合物驱采出液破乳剂8911,其破乳效果显著,优于现场在用破乳剂,可将原油脱水温度从35~60℃降低到30℃,破乳剂加药浓度从70~100 mg/L降低到30 mg/L.
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