缓交联高强度凝胶的制备和性能研究  

Preparation and properties of slow crosslinking high strength gels

作　　者：代磊阳 牟媚 徐国瑞 张晓封[1] 郐婧文 DAI Leiyang;MU Mei;XU Guorui;ZHANG Xiaofeng;KUAI Jingwen(Tianjin Branch,CNOOC China Ltd.,Tianjin 300459,China;National Key Laboratory for Efficient Developmentof Offshore Oil and Gas,Beijing 102209,China;Tianjin Key Laboratory of Offshore Oil Reserves Exploitation,Tianjin 300459,China;China Oilfield Services Limited,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459 [2]海洋油气高效开发全国重点实验室,北京102209 [3]天津市海洋石油难动用储量开采重点实验室,天津300459 [4]中海油田服务股份有限公司,天津300459

出　　处：《石油化工》2024年第6期871-877,共7页Petrochemical Technology

摘　　要：为平衡注入性与封堵性间的矛盾,需选择初始黏度低、成胶时间长、成胶后强度高的凝胶堵剂,鉴于铬冻胶成胶时间调控难度大、酚醛交联剂毒性大等问题,采用聚乙烯亚胺为交联剂、聚酰胺-胺为主剂、硫脲为除氧剂、硅溶胶为增强剂制备凝胶。实验结果表明,该凝胶可在70℃、总矿化度为26205 mg/L的储层条件下使用,成胶时间为4 d,凝胶强度可达到H级,封堵率可达90%以上,对实现深度堵水有一定的指导意义。To balance the contradiction between injection and plugging,it is necessary to select a gel plugging agent with low initial viscosity,long gelation time and high gel strength.In view of the difficulties in regulating the gelation time of chromium gel and the high toxicity of phenolic crosslinker,the gel was prepared with polyethylenimide as crosslinker,polyamide-amine as the main agent,thiourea as the deoxidizer and silica sol as the strengthening agent.The results show that the gel can be used under the conditions of reservoir temperature of 70℃,total salinity of 26205 mg/L with gelation time of 4 d,gel strength of H level,and plugging rate of more than 90%,which provides certain guiding significance for the solution to deep water plugging.

关 键 词：凝胶 聚酰胺-胺 耐盐 低黏 

分 类 号：TE39[石油与天然气工程—油气田开发工程]