地热井固井用高导热水泥浆研究  

Study on high thermal conductivity cement slurry for geothermal well

作　　者：杨淯琨 李明[1] 张弛 翟显治 YANG Yukun(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,Sichuan,China)

机构地区：[1]西南石油大学新能源与材料学院,四川成都610500 [2]中国石油集团工程技术研究院有限公司,北京102206

出　　处：《水泥》2025年第5期1-4,共4页Cement

基　　金：油气钻完井技术国家工程研究中心科学研究基金项目资助(NERCDCT202304)。

摘　　要：地热能作为一种绿色可再生的能源,具有很大的开采前景,提升地热井固井水泥石的导热系数可以提高地热资源开采效率。现有地热井高导热水泥浆面临导热系数偏低,浆体配伍性差等难点。通过开展高导热填料的优选和复配、高导热水泥浆与固井外加剂之间的配伍性研究,以及外加剂对水泥浆导热系数和应用性能的影响研究,通过添加鳞片石墨和铁矿粉及其他外加剂制备了一种应用性能良好,导热系数高于1.80 W/(m·K),适合地热井固井需求的水泥浆体系;高导热填料由于自身的电子传热或声子传热能力较好,在达到一定添加量后通过紧密堆积和导热路径两种机制达到提升油井水泥的导热能力的效果。As a green and renewable energy source,geothermal energy has great mining prospects.Improving the thermal conductivity of cementing cement stone in geothermal wells can improve the efficiency of geothermal resource exploitation.The existing high thermal conductivity cement slurry for geothermal wells faces difficulties such as low thermal conductivity and poor compatibility of slurry.Through the researches on the optimization and compounding of high thermal conductivity fillers,the compatibility between high thermal conductivity cement slurry and cementing admixtures,and the influence of admixtures on the thermal conductivity and application performance of cement slurry,a cement slurry system with good application performance and thermal conductivity higher than 1.80 W/(m·K)was prepared by adding flake graphite,iron ore powder and other admixtures,which was suitable for the cementing requirements of geothermal wells.Due to good electron heat transfer or phonon heat transfer ability of the high thermal conductivity filler,it can improve the thermal conductivity of oil well cement by two mechanisms of close packing and thermal conduction path after reaching a certain amount of addition.

关 键 词：地热井 固井材料 导热水泥 鳞片石墨 水泥浆体系 

分 类 号：TE256[石油与天然气工程—油气井工程]