填料对中深层地热井固井材料导热性能的影响规律研究

杨雨; 李博; 向鑫

杨雨,李博,向鑫.填料对中深层地热井固井材料导热性能的影响规律研究[J].贵州地质,2025,42(4):541-546, 495

填料对中深层地热井固井材料导热性能的影响规律研究

Study on the Influence Regularity of Fillers on the Thermal Conductivity of Mid-deep Geothermal Well Cementing Materials

投稿时间：2025-07-24

DOI：

中文关键词: 中深层地热井水泥基复合固井材料导热系数理论模型数值模拟导热填料

英文关键词:Mid-deep geothermal well Cement-based composite cementing material Theoretical model of thermal conductivity Numerical simulation Thermal conductive filler

基金项目:贵州省科技计划创新人才团队建设项目(编号:黔科合人才CXTD〔2025〕059)资助

作者	单位
杨雨	资源与环境工程学院贵州大学,贵州贵阳550025 喀斯特地质资源与环境教育部重点实验室,贵州大学,贵州贵阳550025
李博	喀斯特地质资源与环境教育部重点实验室,贵州大学,贵州贵阳550025
向鑫	贵州省地质调查院,贵州贵阳550081

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中文摘要:

固井材料的导热性能对中深层地热能高效开发具有极其重要的作用，建立准确的水泥基固井材料数值模型有助于为高导热固井材料的研发提供重要技术参考。本文在分析现有填充型复合材料导热系数理论模型的基础上，建立了“水化层-未水化层”双层体系的水泥基复合固井材料数值模型，通过数值模拟方法研究了导热填料形状、粒径、颗粒间距和掺量对固井材料导热系数的影响规律。结果发现，方形填料导热效果优于球形，板状填料具有显著的各向异性，当其平行于热流方向时，导热效果最佳。固井材料的导热系数随填料粒径增加呈线性增大的趋势，但随填料颗粒间距增大表现为先快速减小，后趋于稳定，最后缓慢降低的趋势。导热填料掺量对固井材料导热系数影响最大。要想最大限度提高固井材料的导热系数，应在确保其符合固井要求的情况下尽可能增大填料掺量。

英文摘要:

The thermal conductivity of cementing materials plays an extremely important role in the efficient development of mid to deep geothermal energyEstablishing an accurate numerical model of cement-based cementing materials can provide important technical references for the research and development of high thermal conductivity cementing materialsOn the basis of analyzing the existing theoretical models of thermal conductivity of filled composite materials，this article established a numerical model of cement-based composite cementing materials with a double-layer system of ‘hydration layer - unhydrated layer’The influence of thermal conductivity filler shape，particle size，particle spacing，and dosage on the thermal conductivity of cementing materials is studied through numerical simulation methodsThe results showed that the thermal conductivity of square fillers was better than that of spherical fillers，while plate-shaped fillers had significant anisotropyWhen they were parallel to the direction of heat flow，the thermal conductivity was optimalThe thermal conductivity of well cementing materials showed a linear increase trend with the increase of packing particle size，but with the increase of packing particle spacing，it first rapidly decreased，then tended to stabilize，and finally slowly decreasedThe dosage of thermal conductive filler had the greatest impact on the thermal conductivity of cementing materialsTo maximize the thermal conductivity of cementing materials，the amount of filler should be increased as much as possible while ensuring that they meet the cementing requirements

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