以有机胺为起始剂,环氧乙烷和环氧丙烷为单体,氢氧化钾为催化剂,在环氧丙烷开环聚合温度为(130 ±5)℃,环氧乙烷开环聚合温度为(120±5)℃,压强低于0.5 MPa的条件下,合成嵌段聚醚型破乳剂单剂AP44,用AP44与助剂TEAC、DMA、DEA复配,对陕北油田有代表性的河庄坪和子长原油进行脱水实验.结果表明,对河庄坪原油,在55℃,破乳剂总用量100 mg/L,脱水时间6h,AP44与TEAC复配比例为3:2,与DMA、DEA复配比例为1:4时,脱水速率快,脱水率最高,分别达到98.7％,95.8％,94.8％；对子长原油,在65℃,破乳剂总用量200 mg/L,脱水时间6h,AP44与TEAC复配效果最好,当复配配比为2:3时,脱水速率快,脱水率最高,达到99.3％；脱出的水清不含油,无悬浮物,油水界面整齐.%Using organic amine as primer, propylene oxide (PO) and epoxy ethane (EO) as monomer, potassium hydroxide as catalyst, the AP44 multi-block polyether demulsifier is. synthesized at less than 0.5 MPa and at (130 ± 5 )℃ for PO and at (120 ± 5)℃ for EO, to combine with TEAC, DMA and DEA with proportion. Dehydration experiments of the combinational demulsifiers have done at 55℃ in 6 h and with demulsifier concentration of 100 mg/L for Hezhuangping crude oil and at 65 t in 6 h and with demulsifier concentration of 200 mg/L for Zichang crude oil in North Shaanxi oil fields. The results showed that for Hezhuangping crude oil, the dehydration rate of combinational demulsifiers is highest to 98. 7% ,95. 8% and 94. 8% ,and dehydration speed is rapid when the proportion of AP44 to TEAC is 3:2,and AP44 to DMA and DEA is 1:4. For Zichang crude oil,the combinational demulsifiers of AP44 to TEAC have the best dehydration effects.When the proportion of AP44 to TEAC is 2:3,the dehydration rate is highest to 99. 3% ,and dehydration speed is rapid. There is no suspended matter,separated water is clear, interface between oil and water is homogeneous by using combinational demulsifiers.
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