Lithologic Reservoirs ›› 2014, Vol. 26 ›› Issue (6): 46-49.doi: 10.3969/j.issn.1673-8926.2014.06.008

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Heterogeneity of shale reservoirs based on CT images

XU Zuxin   

  1.  PetroChina Research Institute of Petroleum Exploration & Development ， Beijing 100083 ， China
  • Online:2014-11-20 Published:2014-11-20

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Abstract:

 In order to study the heterogeneity of shale mineral components, this paper analyzed the CT scanning images of shale by using digital image processing techniques, studied the distribution characteristics of shale mineral components, and discussed the relationship between the content of mineral components and fractal dimension. The research results show that the density of shale mineral components on the CT image is much greater than that of organic matter and micro pore structure, so the mineral components are easy to identify. At the same time, the distribution of shale mineral components have fractal characteristics, showing a certain self-similarity, and the fractal dimension of mineral components can reflect the heterogeneity of mineral components. The study on shale heterogeneity based on CT images is an effective supplement of shale reservoir evaluation, and it can guide the evaluation of shale brittleness.

Key words:  Chang9 oil reservoir set , lower assemblage of Yanchang Formation , tight sandstone reservoir , Wangwazi area , Ordos Basin

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