DW原油破乳剂的性能及在渤海油田的矿场应用技术

Performance and Pilot Test Technology of DW Demulsifier in Bohai Oilfield

檀国荣 刘伟 蒋珊珊 张健 靖波 翟磊 陈文娟 付华山 吴红月

TAN Guorong LIUWei JIANG Shanshan ZHANG Jian JING Bo ZHAI Lei CHENWenjuan FU Huashan WU Hongyue

为获得适合渤海油田聚合物驱稠油采出液的破乳剂，将多乙烯多胺聚醚、壬基酚聚醚及二乙醇胺聚醚的丙烯酰氯酯化物与甲基丙烯酸、丙烯酸丁酯在水体系中聚合，制备了具有线型多分支结构的高分子破乳剂DW03。通过瓶试法研究了室内合成的DW03 的破乳效果，在渤海油田开展了DW03 工业品的矿场瓶试和矿场应用试验。结果表明：室内合成的DW03 对原油乳状液破乳60 min 的脱水率大于80%。矿场瓶试试验中，与现场在用破乳剂XC33相比，采出液经DW03工业品破乳后的原油平均含水率低5.5%，污水平均含油量低995 mg/L。矿场应用试验中，DW03 适宜的使用浓度范围为90～120 mg/L，最佳加量为100 mg/L；与使用XC33 的结果相比，DW03 使用浓度降幅为23%，热处理器出口原油含水率降幅为26%，脱出污水含油量降幅为66%。DW03 具有用量低、脱水率高、脱出水清的优点，破乳效果好于XC33。图5 表2 参12

In order to obtain a demulsifier suitable for heavy oil produced fluid by polymer flooding in Bohai oilfield，demulsifier DW03 with comb-like structure was developed by the polymerization of acrylic modified polyether，methylacrylic acid and butyl acrylate in aqueous. The demulsifying performance of DW03 which was synthesized in lab was studied by bottle test. The bottle test in situ and the pilot test of DW03 which was produced in plant were conducted in Bohai oilfield. The results showed that the dehydration ratio of DW03 which was synthesized in lab was greater than 80% for crude oil emulsion in 60 min. Compared with demulsifier XC33 which was used in oilfield，the average water content in oil and the average oil content in produced water decreased 5.5% and 995 mg/L respectively after emulsion breaking of produced fluid by DW03 in bottle test in situ. During the pilot test，the appropriate concentration of DW03 ranged from 90 to 120 mg/L，and the optimum concentration of DW03 was 100 mg/L. The dosage of DW03 reduced by 23%，water content in oil after thermo-chemical treatment reduced by 26%，and oil content in produced water reduced by 66% compared with the result of the same process by XC33. DW03 had advantages including low dosage，high dehydration rate，clear dehydrated water，and good demulsification effect than XC33.

10.19346/j.cnki.1000-4092.2016.03.031