传导和对流加热模式下碳质页岩孔隙结构及渗透性对比分析  

Comparative Analysis on Pore Structure and Permeability of Carbonaceous Shale Under Conduction and Convective Heat

作　　者：姜星 康志勤[1,2] 高鹏贵 韩贺旭 JIANG Xing;KANG Zhiqin;GAO Penggui;HAN Hexu(School of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Key Laboratory of In-Situ Modified Mining of Ministry of Education,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Inspection and Testing Center of Shanxi Province(Institute of Standard Metrology of Shanxi Province),Taiyuan,Shanxi 030006,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]太原理工大学原位改性采矿教育部重点实验室,山西太原030024 [3]山西省检验检测中心(山西省标准计量技术研究院),山西太原030006

出　　处：《矿业研究与开发》2023年第12期47-51,共5页Mining Research and Development

基　　金：国家重点研发计划项目(2019YFA0705501)。

摘　　要：为研究不同温度下水蒸气对碳质页岩孔隙结构及渗透性的影响,将碳质页岩分组置于无水、过热水蒸气两种加热环境中,并加热至300℃、400℃和500℃,对加热后的碳质页岩进行CT扫描和渗透性试验。结果表明:过热水蒸气环境下碳质页岩的裂隙发育程度明显比无水环境下的高,在300℃时,无水环境下碳质页岩没有产生裂隙,而过热水蒸气环境下裂隙宽度已经达到了12~58μm;碳质页岩在过热水蒸气加热条件下的孔隙率要远高于无水加热条件下的孔隙率,两者相差10倍以上;碳质页岩在过热水蒸气加热环境中的渗透率要远远高于无水加热环境中的渗透率,两者相差约2.5~18倍。In order to study the influences of pore structure and permeability of carbonaceous shales under superheated water vapor environments with different temperatures,the carbonaceous shales were grouped into two pyrolysis environments of anhydrous and superheated water vapor,and heated to 300℃,400℃and 500 C.Then,CT scanning and permeability tests were carried out on the heated carbonaceous shales.The experimental results are concluded as follows.Firstly,the development of cracks in carboniferous shale under superheated water vapor is significantly greater than that under anhydrous environment.At 3oo℃,there is almost no crack in carboniferous shale under anhydrous environment,while the width of cracks in carboniferous shale under superheated water vapor has reached 12-58μm.Secondly,the porosity of carbonaceous shale under superheated water vapor is much higher than that under anhydrous environment,and the difference between them is more than 1o times.Thirdly,the permeability of carbonaceous shale under superheated water vapor is much higher than that under anhydrous environment,with a difference of about 2.5-18 times.

关 键 词：碳质页岩 过热水蒸气 孔隙结构 渗透性 CT扫描 

分 类 号：TD845[矿业工程—煤矿开采] TE37[矿业工程—矿山开采]