深层埋管换热岩土温度响应及影响半径  

Ground temperature response and thermal effect radius of heat transfer of deep buried pipe

作　　者：李超[1] 江超[1] 官燕玲[1] 宗聪聪 曲华 吴巧兰 LI Chao;JIANG Chao;GUAN Yanling;ZONG Congcong;QU Hua;WU Qiaolan(Chang’an University,Xi’an,Shaanxi 710018,China)

机构地区：[1]长安大学,陕西西安710018

出　　处：《油气藏评价与开发》2022年第6期859-868,共10页Petroleum Reservoir Evaluation and Development

摘　　要：为了分析深层埋管换热时的岩土温度响应及换热影响半径,研究结合西安某个实际深层埋管供暖工程,基于钻井测井温度、岩土岩性解释以及现场实验建立了埋管换热的全尺寸数值模型。通过对埋管在5 a,即5个供暖期和4个恢复期换热的数值分析,给出了埋管周围岩土温度波动(ΔT)在不同深度上随运行时间的变化情况。在此基础上,考虑到理论研究及工程应用,选择了3种不同的ΔT限值来确定埋管的换热影响半径,同时分析了影响半径的影响因素。结果表明,在ΔT限值足够小至接近0时,埋管换热的影响半径主要受埋管周围岩土自身参数的影响;当ΔT限值增大时,影响半径主要受ΔT限值的影响。In order to analyze the ground temperature response and thermal effect radius of the heat transfer of the deep buried pipe,a full-scale numerical model of buried pipe heat transfer is established based on the well logging temperature,ground lithology interpretation,and field heat transfer experiments of an actual deep-buried pipe heating project in Xi’an.By the numerical analysis of the heat transfer of the buried pipes in five years,namely five heating periods and four recovery periods,the variation of ground temperature fluctuation(ΔT)around the buried pipe at different depths with running time is summarized.On this basis,by considering the theoretical research and engineering application,three differentΔT limits are selected to determine the thermal effect radius,and the factors affecting the thermal effect radius are analyzed.The results show that whenΔT limit is small enough to close to zero,the thermal effect radius is mainly affected by the geotechnical parameters around the buried pipe,and whenΔT limit increases,the thermal effect radius is mainly affected byΔT limit.

关 键 词：地热能 深层埋管换热 岩土温度响应 换热影响半径 数值模型 

分 类 号：TE965[石油与天然气工程—石油机械设备]