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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.
In order to study the distribution characteristics of fractures in the three-dimensional orthogonal faces of oil shale samples, micro-CT scanning was performed on the oil shale samples produced in Daqing using a micro-CT test analysis system. The results show that after pyrolysis, The fractures of the pores on the orthogonal surface are well developed and can be used as oil and gas seepage channels for pyrolysis. However, there are obvious differences in the distribution characteristics, which are shown in the three parameters of porosity, void volume and void volume fractal dimension The difference is larger.Compared with XOZ and YOZ surfaces, the distribution of porosity in 70-layer images is more uniform and the structure of the voids is more regular on the XOY surface.In the oil-shale in-situ steam injection, the XOY surface can be regarded as Suitable injection direction.