Microscale Mineral and Pore Structure Characterization of the Low-Permeability Sandstone in the Ordos Basin, China

Figure 5

Pore types of Chang 2 reservoir in the study area. (a) Residual intergranular pores (IP) and dissolution pores (DP) (Z140, 1473.4 m); (b) particle leaching dissolution pores (LD) (Z140, 1473.4 m); (c) particle cracks (PC) (Z140, 1473.9 m); (d) overall, poor pore development (Z140, 1473.9 m).

(a)

(b)

(c)

(d)