Effect of Microscopic Pore Throat Structure on Displacement Characteristics of Lacustrine Low Permeability Sandstone: A Case Study of Chang 6 Reservoir in Wuqi Oilfield, Ordos Basin

Figure 4

Microscopic pore types in Wuqi area: (a) intergranular pore X10, 1911.58 m; (b) the dissolution pore of feldspar X39, 1889.06 m; (c) intercrystalline pores of illite X20, 1879.18 m; (d) intercrystalline pores of chlorite X24, 1876.64 m.

(a)

(b)

(c)

(d)