中国石油大学学报（自然科学版）2023，Vol.47Issue(6)：26-34,9.DOI:10.3969/j.issn.1673-5005.2023.06.003
基于数字岩石物理的油页岩热导率模拟
Effect of cracks on thermal conductivity of oil shale after microwave pyrolysis
摘要
Abstract
By leveraging digital core technology,this study comprehensively accounted for the impact of the rock's pore space structure on rock thermal conductivity.The research conducted a three-dimensional visualization of internal pore networks,fractures,and fissures within oil shale exposed to microwave radiation across temperatures ranging from room temperature to 600℃.The findings reveal that the thermal conductivity perpendicular to the bedding plane surpassed that parallel to the bedding plane.The strong thermal anisotropy of oil shale results in uneven heat transfer,with thermal conductivity generally decreasing in all three directions.Compared with an empirical model,the accuracy was deemed acceptable.The study ob-served an upper bound for the ratio of anisotropy(=parallel/vertical thermal conductivity)at 2.149.The highest anisotropy was observed in the region with the lowest conductivity.Changes in the internal structure of oil shale is the primary cause for the decrease in thermal conductivity.The research presented in this paper offers valuable insights for the exploration of rock thermal properties at the core scale.关键词
油页岩/热导率/数字岩心/有效热导率Key words
oil shale/thermal connectivity/digital core/effective thermal conductivity分类
能源科技引用本文复制引用
张永利,涂钰滢,马玉林..基于数字岩石物理的油页岩热导率模拟[J].中国石油大学学报（自然科学版）,2023,47(6):26-34,9.基金项目
国家重点研发计划项目(2019YFA0705501) （2019YFA0705501）
