The Evolution of Diagenetic Fluids and Accumulation Characteristics of Tight Sandstone Reservoir in Upper Paleozoic, Southwestern Ordos Basin

Figure 5

Characteristics of pore types in the Upper Paleozoic Erathem sandstone of the study area. (a) Intergranular pores and fractures, Zitan 1 well, He 8 section, 3736.19 m; (b) intergranular pores and intragranular pores, Zhentan 2 well, Shan 1 section, 2893.10 m; (c) residual intergranular pores and intergranular dissolution pores, Ling 1 well, Shan 1 section, 3469.69 m; (d) intergranular pores and intragranular pores, Qingtan 2 well, Shan 1 section, 4723.68 m.

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