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CT实验条件下油页岩内部孔裂隙分布特征 被引量:8

Study on distribution characteristics of pores and fissures inside oil shale under the CT experiment
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摘要 为研究油页岩样内部三维正交面孔裂隙的分布特征,利用显微CT试验分析系统,对产自大庆的油页岩样进行显微CT扫描,结果表明:经过高温热解作用后,三维正交面上孔裂隙都非常发育,可作为热解产出油气的渗流通道,但分布特征却存在较明显差异,表现在孔隙度、空隙团、空隙团数量分形维数3个方面的参数值差异较大.与XOZ和YOZ面比较,在XOY面上,70层图像的孔隙度分布较均匀,空隙团的结构较规则.在油页岩原位注蒸气开采中,XOY面可作为为较适合的注热方向. The distribution characteristics of pores and fissures in the three-dimensional orthogonal slices inside the oil shale samples was examined.A micro-CT experimental analysis system was used to perform a non-invasive CT scanning of oil shales from Daqing,The experimental results indicate that pores and fissures in the three-dimensional orthogonal slices are very developed after pyrolysis.Pores and fissures as seepage channel of oil and gas from pyrolysis,its distribution characteristics are clearly different.The differences performed in three parameter values of porosity,void groups,the number of void group fractal dimension,which are quite different.Compared with XOZ and YOZ plane,the distribution of porosity in XOY plane is more homogeneous and the structure of void is more rules.XOY plane can be more suit direction for heat injection when in-situ mining of oil shale.
作者 赵静 冯增朝 杨栋 康志勤 ZHAO Jing,FENG Zengchao,YANG Dong,KANG Zhiqin(Mining Technology Institute of Taiyuan University of Technology,Taiyuan 030024,China)
出处 《辽宁工程技术大学学报:自然科学版》 CAS 北大核心 2013年第8期1044-1049,共6页 Journal of Liaoning Technical University (Natural Science Edition)
基金 国家自然科学基金资助项目(U1261102)
关键词 油页岩 孔隙度 空隙团 分形维数 显微CT 热解 三维重建 渗流 oil shale porosity void group fractal dimension micro-CT pyrolysis three-dimensional reconstruction seepage
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