Differential Occurrence Characteristics and Influence Factors of Reservoir Movable Fluids in Tight Gas: A Case Study of Shan 1 Reservoir in Yanchang Area

Figure 4

Pore characteristics of Shan 1 reservoir. (a) Intergranular solution pore, Cn105 well, 2482.84 m. (b) Intergranular solution pore, Cn109 well, 2221.37 m. (c) Microfissure, Cn93 well, 2276.68 m. (d) Rock debris solution pore, Cn105 well, 2488.78 m. (e) Rock debris solution pore, Cn98 well, 2087.1 m. (f) Feldspar solution pore, Cn98 well, 2096.18 m. (g) Calcite cementation, Cn98 well, 2093.71 m. (h) Calcite metasomatism detritus, Cn98 well, 2091.46 m. (i) Clay mineral filling pore, Cn98 well, 2091.9 m. (j) Clay mineral filling pore, Cn98 well, 2093 m. (k) Calcite cementation and clay mineral filling, Cn98 well, 2094.46 m. (l) Quartz secondary enlargement and clay mineral filling, Cn98 well, 2095.42 m.

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