稠油油溶性破乳剂的研制与性能评价

摘要

Tahe heavy oil has the characters of high asphaltene content and mechanical mixture.An oil soluble demulsifier by graft copolymerization of polyether and polyacrylic acid was synthesized aiming at the properties of the crude oil.The effect of synthesis conditions, such as synthesis routes, amount of acrylic acid and initiator, and dropping temperature of acrylic acid, on the performance of product was investigated.A complex demulsifier RP-04 was then prepared by combination of the oil soluble demulsifier and an aid agent.The laboratory continuous evaluation test shows that the water content in 3 level desalting and dewatering crude treated by the RP-04 and the reference demulsifier on-the-spot is 0.09% and 0.70%, respectively, and the salt (NaCl) content is 7 mg/L and 9 mg/L, respectively.When the demulsifier RP-04 was used together with desalting aid agent, the total chloride of treated oil is reduced from 16 μg/g to 4.9 μg/g.%针对塔河稠油沥青质含量高,并含有机械杂质的特点,合成了聚丙烯酸聚醚油溶性破乳剂,考察了合成路线、丙烯酸加量、引发剂加量、滴加温度等合成条件对产品性能的影响,并与助剂复配研制了油溶性复合破乳剂RP-04.实验室动态模拟试验评价结果表明,RP-04与现场对比剂的三级脱后油的水含量分别为0.09%和0.70%,盐(NaCl)含量分别为7 mg/L和9 mg/L.破乳剂与脱盐助剂联合使用可使脱后油总氯含量从16 μg/g降低到4.9 μg/g.