摘要
为应对超深层固井面临的高温水泥浆沉降稳定性挑战,以酰胺类单体为共聚主链,引入十二烷基乙烯基醚疏水侧链和少量交联剂N,N-亚甲基双丙烯酰胺,制备了一种微交联型疏水缔合聚合物(P-ADD)。通过红外光谱、凝胶渗透色谱、热重分析对P-ADD结构进行表征,并测试其水溶液黏温曲线、水泥浆流动度、沉降稳定性和稠化曲线等性能。结果表明,P-ADD的热稳定性良好,其2%水溶液在200℃下黏度保持率达65.8%。P-ADD加量为1%时,水泥浆流动性和高温稳定性综合性能较好,在200~220℃温度范围内,体系无游离液产生,水泥石上下密度差小于0.03 g/cm^(3)。P-ADD具有化学微交联和疏水缔合双功能结构,可有效解决超深层固井水泥浆高温沉降稳定性问题,满足极端工况固井需求。
To address the challenge of the sedimentation stability of high-temperature cement slurries in ultra-deep well cementing,a micro-crosslinked hydrophobically associating polymer(P-ADD)was prepared using an amide monomer as the copolymer main chain,introducing a dodecyl vinyl ether hydrophobic side chain and a small amount of crosslinking agent N,N-methylenebisacrylamide.The structure of P-ADD was characterized by infrared spectroscopy,gel permeation chromatography,and thermogravimetric analysis,and its properties such as the viscosity-temperature curve of its aqueous solution,the fluidity of the cement slurry,sedimentation stability,and thickening curve were tested.The results show that P-ADD has good thermal stability,and the viscosity retention rate of its 2%aqueous solution reaches 65.8%at 200℃.When the dosage of P-ADD is 1%,the comprehensive performance of the fluidity and high-temperature stability of the cement slurry is better.In the temperature range of 200~220℃,no free liquid is generated in the system,and the density difference between the upper and lower parts of the cement stone is less than 0.03 g/cm^(3).P-ADD has a dual-functional structure of chemical micro-crosslinking and hydrophobic association,which can effectively solve the problem of the high-temperature sedimentation stability of ultra-deep well cementing slurries and meet the cementing requirements under extreme conditions.
作者
郑锟
马骉
冯彬
聂世均
曾培华
李学洁
ZHENG Kun;MA Biao;FENG Bin;NIE Shijun;ZENG Peihua;LI Xuejie(Downhole Service Company of CNPC Chuanqing Drilling Engineering Company Limited,Chengdu 610052,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China)
出处
《应用化工》
北大核心
2025年第11期2884-2888,2898,共6页
Applied Chemical Industry
基金
中国石油天然气股份有限公司科技项目(2024ZS49)
中国石油集团川庆钻探工程有限公司科技项目(CQXN-2023-13)。
关键词
微交联
疏水缔合聚合物
沉降稳定性
超高温
悬浮稳定剂
micro-crosslinking
hydrophobically associating polymer
settlement stability
ultra-high temperature
suspension stabilizer
