层理型中深层热储热导率计算模型的构建与应用  

Construction and Application of a Thermal Conductivity Model for Stratified Medium-Depth Thermal Reservoirs

作　　者：王志国[1] 杜佳华 董芋双 何刘 曹静 范宇辰 WANG Zhiguo;DU Jiahua;DONG Yushuang;HE Liu;CAO Jing;FAN Yuchen(School of Civil Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China)

机构地区：[1]东北石油大学土木建筑工程学院,黑龙江大庆163318

出　　处：《当代化工》2025年第2期389-394,399,共7页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:51706154);黑龙江省自然科学基金项目(项目编号:E2018011)。

摘　　要：同轴换热器是实现中深层水热型地热资源高效取热技术之一,其取热主体热储层的热传导特性研究,对提升换热器取热性能具有重要的理论意义。为此,基于表征单元体(REV)思想,提出饱和中深层热储层理结构的REV热导率计算模型和宏观区间热导率计算模型。以砂岩为例,分析了孔隙率、含水率、含杂率和孔隙通道分布系数变化对验证后的宏观区间热导率计算模型热导率的影响规律。结果表明:当其他3种变量一定时,模型热导率随孔隙率的增大呈下降趋势;当孔隙率、孔隙通道分布系数一定时,模型的热导率与孔隙中的含水率呈负相关性,与杂质颗粒的含量呈正相关性;当孔隙率、含水率一定时,孔隙通道分布系数越大,模型的热导率越大。Coaxial heat exchanger is one of the technologies for realizing efficient heat extraction from medium-depth hydrothermal geothermal resources,and the study of heat conduction characteristics of thermal reservoir,the main body of heat extraction,is of great theoretical significance for improving the heat extraction performance of the heat exchanger.Based on the idea of Representative Elementary Volume(REV),the REV thermal conductivity calculation model and the macro interval thermal conductivity calculation model for saturated medium-depth thermal reservoir structure were proposed.Taking sandstone as an example,the influence of the variation of porosity,water content,pore channel distribution coefficient and other parameters on the thermal conductivity of the validated macroscopic interval thermal conductivity calculation model was analyzed.The results showed that,when the pore channel distribution coefficient and water content were certain,the model thermal conductivity showed a decreasing trend with the increase of porosity;when the porosity and pore channel distribution coefficient were certain,the larger the water content was,the smaller the thermal conductivity of the model was;when the porosity and water content were certain,the larger the pore channel distribution coefficient was,the larger the thermal conductivity of the model was.

关 键 词：中深层水热型地热资源 层理型热储 表征单元体 热导率 

分 类 号：TQ018[化学工程] TK521[动力工程及工程热物理—热能工程]