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
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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.
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.
引文
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[5]陈洁渝,严春杰,李子冲,等.油页岩渣的综合利用[J].矿产保护与利用,2006,76(6):41-45.CHEN Jieyu,YAN Chunjie,LI Zichong,et al.Comprehensive utilization of oil shale residue[J].Conservation and Utilization of Mineral Resources,2006,76(6):41-45.
[6]陈殿义.国内外油页岩开采方法和利用现状[J].吉林地质,2005,24(4):85-91.CHEN Dianyi.Current status of oil shale production methods and utilization at home and abroad[J].Jilin Geology,2005,24(4):85-91.
[7]刘招君,董清水,叶松青,等.中国油页岩资源现状[J].吉林大学学报:地球科学版,2006,36(6):869-876.LIU Zhaojun,DONG Qingshui,YE Songqing,et al.The situation of oil shale resources in China[J].Journal of Jilin University:Earth Science Edition,2006,36(6):869-876.
[8]杨庆春,周怀荣,杨思宇,等.油页岩开发利用技术及系统集成的研究进展[J].化工学报,2016,67(1):109-118.YANG Qingchun,ZHOU Huairong,YANG Siyu,et al.Research progress on utilization and systemic integration technologies of oil shale[J].CIESC Journal,2016,67(1):109-118.
[9]曾帅,周怀荣,钱宇.煤热解制油和油页岩制油技术评述与比较分析[J].化工学报,2017,68(10):3658-3668.ZENG Shuai,ZHOU Huairong,QIAN Yu.Review and techno-economic analysis of coal pyrolysis to liquid and oil shale to liquid processes[J].CIESC Journal,2017,68(10):3658-3668.
[10]甘树才,杨春明,徐吉静,等.油页岩灰渣制备人造大理石及其性能[J].吉林大学学报:地球科学版,2011,41(3):879-884.GAN Shucai,YANG Chunming,XU Jijing,et al.Preparation of artificial marble from oil shale ash and its properties[J].Journal of Jilin University:Earth Science Edition,2011,41(3):879-884.
[11]季桂娟,杨春明,甘树才,等.利用油页岩灰渣制备通用硅酸盐水泥[J].吉林大学学报:地球科学版,2012,42(4):1173-1178.JI Guijuan,YANG Chunming,GAN Shucai,et al.Prodution of portland cement with oil shale ash[J].Journal of Jilin University:Earth Science Edition,2012,42(4):1173-1178.
[12]李术元,耿层层,钱家麟.世界油页岩勘探开发加工利用现状---并记2013年国外两次油页岩国际会议[J].中外能源,2014,19(1):25-33.LI Shuyuan,GENG Cengceng,QIAN Jialin.Global oil shale exploration,development and utilization today:two oil shale symposiums held in 2013[J].Sino-Global Energy,2014,19(1):25-33.
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