不同温度下油页岩热解及孔隙特征实验研究:以抚顺样品为例  

Experimental study on the pyrolysis and pore characteristics of oil shale at different temperatures:taking Fushun samples as an exemple

作　　者：高涛 赵静[1] GAO Tao;ZHAO Jing(Institute of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《中国矿业》2019年第3期139-142,147,共5页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51704206);山西省应用基础研究面上青年基金项目资助(编号:201701D221238)

摘　　要：利用马弗炉和热重分析仪对抚顺油页岩的热解特性进行分析,实验结果:300～600℃为抚顺油页岩的主要失重阶段,失重率约为20%。利用显微CT对高温作用后的油页岩样进行实验研究,结果显示:经过高温作用后,油页岩内部的孔隙和裂隙数目显著增多,但孔隙率值升高幅度小,表明大孔不发育,且孔隙大多处于孤立分布的状态,孔隙间相互连通性差,逾渗概率值较小,因此在开采初期应该采用水力压裂等方法提高其渗透性。The muffle furnace and thermogravimetric analyzer are used to analyze pyrolysis characteristics of Fushun oil shale,the results show that the temperature from 300 ℃ to 600 ℃ is the main weightlessness stage of Fushun oil shale,and the weightlessness rate is nearly 20%.By conducting microscopic CT experiments on the oil shale samples after the action of high temperature,the results are:after the effect of high temperature,a large number of pores and cracks are formed inside the oil shale.However,the increase of porosity is small,indicating that the macropore is not developed,and most of the pores are in a state of isolated distribution,with poor interconnectedness and less percolation probability.Therefore,hydraulic fracturing or other methods should be used to improve the permeability in the early stage of mining.

关 键 词：油页岩 热解 显微CT 孔隙率 

分 类 号：TU45[建筑科学—岩土工程]