Opportunities in Measuring Multiscale Pore Structure of the Continental Shale of the Yanchang Formation, Ordos Basin, China

Pores of shale exhibit multiscale characteristics, and pore characterization is challenging due to the complexity systems. Currently, research focused on nano-submicron pores, but structure micrometer-scaled pores not well understood. In this research, an investigation three-dimensional network Chang 7 in Ordos Basin China was conducted, order provide insight into full characteristics Nano-CT micro-CT scanning technology used comprehensively delineate at different scales, for further understanding gas storage mechanism rocks. Results show that radius micro-scale ranges from 1 15 ?m, with average 2.8 radii 1–5 ?m occupy approximately 90% all pores. For nano-scale size 86 2679 nm, 152 yet it has a rather concentrated distribution within 300 nm. The constitute most amount shale, whereas volumes. Moreover, results more than 70% are isolated indicating bodies formed reservoir have poor connectivity. Positive linear relationships between sizes number throats were both obtained, suggesting larger tend better connectivity smaller