钻探工程2025，Vol.52Issue(3)：1-11,11.DOI:10.12143/j.ztgc.2025.03.001
地热井固井中硅酸盐水泥体系的技术现状及发展趋势
Technical status and trends of portland cement system in geothermal well cementing
摘要
Abstract
In geothermal well construction,cementing is indispensable to ensure the outlet water temperature and enhance wellbore durability.Currently,class G cement remains the primary choice for geothermal well cementing.However,complex environments such as large geothermal gradients,fractured formations and the presence of corrosive media require more strict performance requirements for traditional portland cement systems.This paper analyzes existing technical strategies and future development trends of portland cement systems from three aspects:high-temperature resistance,corrosion inhibition,and low-density performance.The results indicate that the most commonly used method to overcome the deterioration of high-temperature performance of cement is adding silica powder or silica sand and reducing the calcium silicon ratio of the system to adjust the hydration product type.Corrosion inhibitors have evolved from single organic/inorganic inert materials to water-based latex,acid responsive latex,and organic/inorganic composite multi-component anti-corrosion systems.The lightweight cement system formed by absorbing water and tackifier,low density reducing agent or foam still has some shortcomings,such as difficult density maintenance,slow strength development,poor stability,etc.In the future,emphasis should be placed on analyzing the main controlling factors of the strength degradation mechanism of cement and developing new strength degradation inhibitors.Establish multiphase dynamic corrosion conditions and conduct research on the corrosion mechanism of cement stone body and bonding interface.Forming a high-temperature resistant,corrosion-resistant,lightweight leak proof cement system by taking into account the complex environment of geothermal cementing and supplementing with fiber or other sealing materials.Facing the geothermal cementing environment,a comprehensive understanding of the current technical status and development trends of the existing portland cement system can provide reference for the research and development direction of geothermal cement.关键词
地热井固井/硅酸盐水泥体系/性能劣化/防腐措施/轻质防漏Key words
geothermal well cementing/portland cement systems/performance degradation/anti-corrosion measures/lightweight cement for lost circulation control分类
石油、天然气工程引用本文复制引用
陈瑶,谭慧静,王胜,郑秀华,朱文茜,叶有..地热井固井中硅酸盐水泥体系的技术现状及发展趋势[J].钻探工程,2025,52(3):1-11,11.基金项目
四川省科技计划资助项目(编号:2023NSFSC0781) （编号:2023NSFSC0781）
国家自然科学基金青年项目(编号:41902322) （编号:41902322）
雄安新区科技创新专项(编号:2022XAGG0500) （编号:2022XAGG0500）
成都理工大学珠峰科学研究计划(编号:80000-2020ZF11411) （编号:80000-2020ZF11411）
