Abstract:

In order to study the characteristics of fractures in the shale，we used the industrial CT to scan the shale core in the Jurong
basin，and analyzed the CT scanning data of shale by the digital processing technology. We established the model of CT scanning data
and extracted the fracture by VGStudio MAX software. In this way we could study the differences between the structure of fractures in the
shale which is composed of different mineral composition and the various CT image. The research results show that there are two groups
of fractures with different strike and dip of fracture developed. The dip of one group with high angle was approximately 70°~90°；the other
group with low angle was approximately 30°~40°. Jurong basin may have experienced at least two tectonic events after the Rhuddanian.
The comparison of the shale composed of different composition indicated that the greater density differences of mineral component，the
industrial CT scanning image will be more clear, and that the larger size of mineral grain, the effect of scanning will be more obvious.

Key words: CT scanning；non-destructive test；the extracting of core fracture；the characteristics of core fracture