一种树状多支化破乳剂的合成与应用  

Synthesis and Application of a Dendritic Multi-branched Demulsifier

作　　者：肖丽华 薛宝庆 吕鹏 宋鑫 夏欢 XIAO Lihua;XUE Baoqing;LYU Peng;SONG Xin;XIA Huan(Tianjin Branch Company,CNOOC(China)Ltd.,Tianjin 300452,P R of China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《油田化学》2022年第4期699-702,710,共5页Oilfield Chemistry

基　　金：“十三五”国家重大专项“渤海油田化学驱产出液处理应用技术研究及示范”(项目编号2016ZX05058-003-002)。

摘　　要：为了提高渤海S油田原油乳状液的破乳效果,先采用苯乙烯和马来酸酐自由基聚合反应合成苯乙烯-马来酸酐共聚物(SMA),然后与1.0代聚酰胺-胺(1.0G PAMAM)进行酰胺化接枝反应,得到以聚苯乙烯-马来酸酐共聚物为主链、以1.0G PAMAM为侧链的多支化水溶性破乳剂TS-Z806。考察了该破乳剂在不同温度(50~90℃)下对原油乳状液的破乳效果,并与聚醚类破乳剂JM-01的破乳效果进行对比,采用该破乳剂首次在渤海油田进行现场应用。室内和现场试验结果表明,温度大于70℃后,聚醚类破乳剂JM-01对原油乳状液的脱水率明显降低,脱水水质变差,故破乳效果变差;而非聚醚类破乳剂TS-Z806在高温下对原油乳状液仍表现出良好的破乳效果。破乳剂TS-Z806在处理渤海S油田原油综合管汇处含聚合物采出液时,表现出了优异的破乳性能,能够明显改善脱出水的水质,破乳后上层油乳化层较低,脱水后乳化层减少约69%。该破乳剂可实现对含聚合物采出液的高效处理,具有较好的现场应用前景。In order to improve the demulsification effect of the crude oil emulsion from Bohai Sea S oil field,styrene-maleic anhydride copolymer(SMA) was synthesized from styrene and maleic anhydride radical polymerization,the polybranched water-soluble demulsifier TS-Z806 was synthesized by graft copolymerization of SMA and 1.0 G PAMAM,the main chain being of polystyrene-maleic anhydride copolymer,and the side chain being of 1.0 G PAMAM. The demulsification effect of the demulsifier on crude oil emulsion at different temperatures of 50—90 ℃ was investigated,and compared with that of polyether demulsifier JM-01,the demulsifier was used for the first time in Bohai Sea S oil field. The results of laboratory and field tests showed that the demulsification effect of polyether demulsifier JM-01 on crude oil emulsion was worse when the temperature was higher than 70 ℃However,TS-Z806,a non-polyether demulsifier,still had good demulsification effect on crude oil emulsion at the higher temperature. The demulsifier TS-Z806 had shown excellent demulsification performance in treating the produced fluid containing polymer at the confluence of the crude oil comprehensive pipelines in Bohai Sea S oilfield. The demulsifier could obviously improve the water quality of the demulsified water,and the emulsified layer of the upper oil was lower after demulsification,the emulsified layer after dehydration decreased by about 69%. The demulsifier could realize the high-efficient treatment of the polymer-containing produced liquid,and had a good field application prospect.

关 键 词：破乳剂 树状支化 采出液处理 水质 

分 类 号：TE39[石油与天然气工程—油气田开发工程]