不同结构聚醚破乳剂对涠洲11-4 油田模拟产出液的破乳作用

Demulsification of Polyether Demulsifiers for WZ11-4 Oilfield Model Produced Emulsion

胡徐彦 田宇 周国华 谢进宜 魏强

HU Xuyan TIAN Yu ZHOU Guohua XIE Jinyi WEI Qiang

为了获得适合涠洲11-4 油田产出液的破乳剂，分别以多乙烯多胺类化合物为起始剂合成了二嵌段和三嵌段的聚醚，采用瓶试法研究了聚醚的嵌段类型、支链数、环氧乙烷段含量以及稀释聚醚用的溶剂对涠洲11-4 油田模拟产出液破乳效率的影响。研究结果表明，亲水基（PEO）位于分子一端的二嵌段聚醚的破乳效率优于亲水基位于分子中间三嵌段型聚醚；聚醚分子中支链数越多，对涠洲11-4 油田模拟产出液的破乳效率越高；对于同系列的聚醚，其分子中PEO段含量存在对应最高破乳效率的最佳值（约为25%）。另外，溶剂对聚醚的破乳效率亦有影响，芳香溶剂与聚醚之间存在某种协同作用。与采用95%乙醇作为溶剂时相比，以二甲苯为溶剂时半脱水时间可降低25%以上。以四乙烯五胺为起始剂、PEO段含量为25%二嵌段聚醚破乳剂HYP-105（二甲苯为溶剂）对涠洲11-4油田产出液的破乳效果与在用进口破乳剂相当，可满足应用要求。图3 表2 参14

In order to obtain a demulsifier suitable for the produced emulsion of WZ11-4 oilfield，A series of polyethers originated from amine initiator was prepared and the effects of sequence of PEO and PPO segments，branch number and PEO content in the polyether demulsifier as well as the solvents on demulsification efficiency were tested. It was found that the diblock polyether had higher demulsification efficiency than that of triblock polyether；the demulsification efficiency increased with the number of branches of the demulsifiers；and there was an optimum PEO content，being of about 25%，at which the polyether exhibited the best demulsification. In addition， the synergism effect between aromatic solvent and polyether demulsifier giving improved demulsification was also found. As compared with polyether dissolved in 95% alcohol，the same polyether dissolved in xylene has much faster dehydration velocity. The industrial two-block polyether demulsifier HYP-105 with PEO content of about 25% that originated from tetraethylenepentamine showed almost the same effect as the incumbent imported one，and could meet the application requirements.

10.19346./j.cnki.1000-4092.2017.01.035