太原理工大学学报2024，Vol.55Issue(2)：260-266,7.DOI:10.16355/j.tyut.1007-9432.20230683
油页岩传热各向异性与原位传导热采模拟分析
Analysis of Anisotropic Heat Transfer Properties of Oil Shale and Simulation of In-situ Thermal Conduction Exploitation
摘要
Abstract
[Purposes]In the in-situ mining of oil shale,poor heat transfer efficiency and pro-nounced anisotropic differences present challenges.[Methods]In this study,standard samples from Xinjiang's Barikun oil shale are adopted to explore heat transfer variations in horizontal and vertical bedding at different temperatures through indoor experiments,and in-situ mining simulation was con-ducted.[Findings]The experimental results show that:1)With the increase of temperature,the heat conduction coefficient of each bedding direction shows a"decreasing"trend,but the heat conduc-tion coefficient of parallel bedding direction is greater than that of vertical bedding direction;2)With the increase of temperature,the specific heat capacity first increases and then decreases.When the temperature is 400℃,the specific heat capacity is the maximum;3)Combined with the micro-CT im-age,with the increase of temperature,the influence of increasing cracks on the heat conduction in the vertical bedding direction is greater than that in the parallel bedding direction.On the basis of the above experimental parameters,the"heat-solid"coupling model of in-situ electric heating of oil shale reservoir is established by COMSOL software.The simulation results show that:With the increase of heating time,anisotropic heat transfer difference gradually appears.When heating duration reaches 600 d,the heat transfer area in parallel bedding direction is obviously larger than that in vertical bedding direction,showing an"ellipse"shape.When heating duration reaches 1 440 d,the heat transfer area increases slightly,and the pyrolysis of the shale in the heating well control area is basically completed.关键词
油页岩/各向异性/热传导系数/显微CT/数值模拟Key words
oil shale/anisotropy/coefficient of heat conduction/micro-CT/numerical simulation分类
矿业与冶金引用本文复制引用
张轩豪,俞凌杰,马中良,李艺龙,姜星..油页岩传热各向异性与原位传导热采模拟分析[J].太原理工大学学报,2024,55(2):260-266,7.基金项目
国家重点研发计划项目(2019YFA0705501) （2019YFA0705501）
山西省研究生实践创新项目2023SJ083 （）
