Impact of Differential Densification on the Pore Structure of Tight Gas Sandstone: Evidence from the Permian Shihezi and Shanxi Formations, Eastern Sulige Gas Field, Ordos Basin, China

Figure 11

(A-1, B-1, and C-1) Greyscale image, (A-2, B-2, and C-2) dissolved pore space, and (A-3, B-3, and C-3) pore-throat connectivity structure (balls are pores, bars are throats) volumes of the tight sandstone samples. (a) Lithofacies 2, SD24-55, 2982.91 m. (b) Lithofacies 3, SD24-55, 2799.78 m (c) Lithofacies 8, 2953.89 m (to highlight the pore connectivity, the dissolved pore space and pore-throat connectivity structure of samples A and B are the 3D structure of the interconnected pores. However, the pore diameter, volume, and pore-throat connectivity of mode 8, namely, sample C are low, while C-2 and C-3 demonstrate the characteristics of all the pores and throats).