摘要
为开发性能稳定且优异的胶乳水泥浆体系,研究了胶乳粉水泥浆体系关键材料,构建了胶乳粉水泥浆体系,研究其性能和微观形貌,并完成了现场应用。研究结果表明,胶乳粉能显著提高水泥石的弹韧性,分散剂DIP-S、降失水剂FLO-S、缓凝剂REM和消泡剂CX66L能有效调节水泥浆的性能。使用这些关键材料构建的胶乳粉水泥浆体系在60℃和90℃条件下流性指数大于0.5,稠度系数小于0.7,稠化时间在3~5 h之间,无自由液形成,且失水量均小于50 mL,抗压强度都在24 MPa以上,常规性能优异。此外,两种温度下胶乳粉水泥浆的弹性模量最低达到5.7 GPa,抗冲击强度和抗窜强度最高分别达到2.09 kJ/m2和7.7 MPa/m2,水泥浆封固能力强。微观形貌表明胶乳粉水泥石内部形成了聚合物膜结构,有助于提高水泥浆的性能。胶乳粉水泥浆体系在页岩气固井现场应用效果好,具有推广价值。
In order to develop the latex cement slurry system with stable and excellent performance,the key materials of the latex powder cement slurry system were studied,the latex powder cement slurry(LPCS)system was constructed,the performance and micromorphology of the LPCS system were studied,and its field application was carried out.The results showed that latex powder could significantly improve the elastic toughness of cement paste,and the dispersant DIP-S,filtrate reducer FLO-S,retarder REM and defoamer CX66L could effectively adjust the performances of cement slurry.Under the conditions of 60℃and 90℃,the fluidity index of the LPCS system constructed with these key materials was greater than 0.5,the consistency coefficient was less than 0.7,the thickening time was 3-5 h,no free liquid was formed,the water loss of cement slurry was less than 50 mL,and the compressive strength was more than 24 MPa.The conventional performances of the latex powder cement slurry were excellent.In addition,at these two temperatures,the minimum elastic modulus of latex powder cement slurry was 5.7 GPa,the maximum impact strength and channeling resistance strength were 2.09 kJ/m2 and 7.7 MPa/m2,respectively,which indicating that The LPCS had strong sealing capacity.The micro morphology showed that the polymer membrane structure was formed in the latex powder cement paste,which was helpful to improve the performance of cement slurry.The application effect of the LPCS system in shale gas well cementation was good,indicating that the LPCS system was worth popularizing.
作者
宋建建
许明标
王晓亮
张敏
胡顺
杜佳琪
SONG Jianjian;XU Mingbiao;WANG Xiaoliang;ZHANG Min;HU Shun;DU Jiaqi(School of Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100,P R of China;Cooperative Innovation Center of Unconventional Oil and Gas,Wuhan,Hubei 430100,P R of China;Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas,Wuhan,Hubei 430100,P R of China;Jingzhou Jiahua Technology Company,Ltd,Jingzhou,Hubei 434000,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2021年第3期406-411,共6页
Oilfield Chemistry
基金
国家科技重大专项“涪陵页岩气水平井钻井液与固井技术究”(项目编号2016ZX05060-015)。
关键词
胶乳粉
水泥浆
固井
弹韧性
页岩气
latex powder
cement slurry
cementing
elastic toughness
shale gas
