Role Played by Oil Emplacement in Controlling Pore Network Evolution of Tight Sandstones

Figure 8

(a) Compositions of sandstones plotted on a ternary diagram based on new classification criterion; casting thin section of (b) high soft component sandstone, (c) calcareous sandstone, (d) low soft component sandstone with continual oil emplacement, and (e) low soft component sandstone with intermittent oil emplacement. CC: calcite cement; GS: grain skeleton; SC: soft component.