石油与天然气化工2025，Vol.54Issue(2)：92-99,8.DOI:10.3969/j.issn.1007-3426.2025.02.013
CTBN和纳米SiO2改性环氧树脂颗粒改善油井水泥脆性研究
Study on reducing the brittleness of oil well cement by CTBN and nano-SiO2 modified epoxy resin particles
摘要
Abstract
Objective A new hydrophilic epoxy resin-based elastic particle is prepared to solve the problem of the strength decline of cement stone caused by the incorporation of existing elastic fillers.Method A new type of elastic resin particle(E-RP)was prepared by modifying epoxy resin with liquid nitrile butadiene rubber(CTBN)and nano-SiO2,and the chemical composition,hydrophilicity,dispersibility,microstructure and mechanical properties of E-RP were studied through Fourier transform infrared spectroscopy,contact angle,ultraviolet spectroscopy,XPS,scanning electron microscopy and uniaxial compression.Result The contact angle between E-RP and water was 54.5°,which had good compatibility with cement slurry,and the successful reaction of CTBN with some epoxy groups and the introduction of flexible segments made E-RP have higher elastic deformation ability,and the compressive elastic modulus of E-RP was reduced by 47.9%compared with pure resin.The addition of E-RP would slightly reduce the fluidity of cement slurry,and improve the compressive strength of cement stone and the deformation ability under load.Compared with the blank cement stone,the elastic modulus of the cement sample containing 4 wt%E-RP particles was reduced by 37.5%.Conclusion E-RP can maintain good dispersibility and interfacial bonding in the cement matrix,thereby alleviating the strength decline of cement stone,and E-RP can consume load energy through its elastic deformation and debonding with the cement matrix,effectively reducing the brittleness of cement stone and ultimately improving the quality of well cementing.关键词
油井水泥/弹性模量/环氧树脂/端羧基液态丁腈橡胶(CTBN)/纳米SiO2Key words
oil well cement/elastic modulus/epoxy resin/carboxyl-terminated butadiene acrylonitrile(CTBN)/nano-SiO2引用本文复制引用
严海兵,张啸锋,赵启阳,陈敏,张成金,石庆..CTBN和纳米SiO2改性环氧树脂颗粒改善油井水泥脆性研究[J].石油与天然气化工,2025,54(2):92-99,8.基金项目
中国石油川庆钻探公司科研项目"耐温150℃固井用弹性水泥浆体系研发"(CQXN-2022-09) （CQXN-2022-09）
