酸化液对固井水泥浆性能影响研究  

Study on Effect of Acidizing Fluid on Properties of Cementing Slurry

作　　者：韩超[1] 赵胜绪 石礼岗[1] HAN Chao;ZHAO Shengxu;SHI Ligang(China Oilfield Services Co.,Ltd.,Hebei Langfang 065201,China)

机构地区：[1]中海油田服务股份有限公司,河北廊坊065201

出　　处：《广州化工》2025年第4期143-146,160,共5页GuangZhou Chemical Industry

基　　金：CCS/CCUS固井关键技术研究及应用(No:YHB24YF011)。

摘　　要：针对创新型固井工艺中残留酸化液对固井水泥浆及水泥石性能产生的潜在不利影响,本文从返排酸化液的特征、酸化液对水泥浆性能的影响及防酸化液腐蚀水泥浆技术3个方面开展研究,明确了返排酸化液的特征及其对水泥浆性能的影响规律以及防酸化液腐蚀水泥浆的关键材料和作用机理。研究表明:水泥浆流变性随酸化液浓度先下降,而后趋于稳定;水泥浆稠化时间与酸化液浓度具备较好的线性正相关性,但当酸化液浓度高于20%,水泥浆出现超缓凝现象;改性硅酸盐水泥防腐蚀体系是当前主流的防腐蚀水泥浆技术,其主要通过向硅酸盐水泥中加入外掺料或外加剂,并结合颗粒级配技术,提高水泥石的致密性、降低碱性水化产物含量来降低腐蚀速率。本文将为快速构建防酸化液腐蚀水泥浆体系提供重要指导,以消除残留酸化液引发的潜在固井作业风险,保障固井作业质量安全。In order to investigate the impact of acidic fluids on the performance of well cement slurry,the characteristics of acidizing return fluid,the effects of acidic fluids on the slurry,and the specific slurry system for preventing acid fluid corrosion were studied.The characteristics of acidizing return fluid,the effects of acidic fluids on the slurry performance,as well as the key additives and mechanisms for preventing acid fluid corrosion of cement slurry,were clarified.The study showed that the rheology decreased with the return acid concentration at first,and then tended to stabilize,the thickening time had a good linear positive correlation with the return acid concentration,but when the concentration was higher than 20%,the thickening time was too long,the anti-corrosion slurry system with modified silicate cement was the current mainstream anti-corrosion cement slurry technology,which included additives in the silicate cement slurry,and combined with the particle grading technology to improve the densification of cement stone and reduce the content of alkaline hydration products to reduce the corrosion rate.The research will contribute to create the slurry system for preventing acid fluid corrosion,eliminating potential risks and ensure cementing operations go well all the time.

关 键 词：固井 酸化 储层改造 防腐蚀 

分 类 号：TE256[石油与天然气工程—油气井工程]