钻井液与完井液2025，Vol.42Issue(6)：781-787,7.DOI:10.12358/j.issn.1001-5620.2025.06.010
地热井固井用低导热水泥浆
Low Thermal Conductivity Cement Slurry for Geothermal Well Cementing
摘要
Abstract
In geothermal energy development,the heat loss of cement sheath plays a key role in affecting heat extraction efficiency.In this study,using class G cement as the base slurry,and hollow glass microspheres and modified palygorskite fiber as composite low thermal conductivity material,a low thermal conductivity cement slurry was formulated through composition optimization.Laboratory experiments on the rheology,stability,thermal conductivity and compressive strength of the cement slurry were all tested.It was found that compared with conventional cement slurries,the thermal conductivity of this cement slurry is reduced by 74.4%,and the 7-d compressive strength of this cement slurry is 19.7 MPa.The use of the low thermal conductivity agents in this cement slurry makes the pores inside the set cement finer and more evenly distributed.This not only reduces the thermal conductivity of the cement;it also improves the mechanical performance and durability of the cement.This technology can be used to reduce the heat loss and enhance the efficiency of geothermal extraction.关键词
地热开采/保温水泥/导热系数/复合低导热材料/微观结构Key words
Geothermal extraction/Thermal insulation cement/Thermal conductivity/Composite low thermal conductivity material/Microstructure分类
能源科技引用本文复制引用
党冬红,黄中伟,李敬彬,刘景丽,任强,刘岩..地热井固井用低导热水泥浆[J].钻井液与完井液,2025,42(6):781-787,7.基金项目
国家自然科学基金创新研究群体项目"新型射流钻井完井"(5242100023). （5242100023）
