Pore Structure Characteristics, Genesis, and Its Controlling Effect on Gas Migration of Quaternary Mudstone Reservoir in Qaidam Basin

Figure 3

SEM photographs of different types of pores in mudstone samples of the Qigequan Formation (by backscattered electron). (a) Tn-18: pure mudstone and the overall morphology characteristics of minerals and pores. (b) Tn-18: pure mudstone, micron organic matter, and organic matter pore. (c) Tn-18: silty mudstone and nanoorganic matter. (d) Tn-18: silty mudstone and nanoclay mineral pore. (e) Tn-18: silty mudstone and micron intergranular pore. (f) Tn-18: sandy mudstone and micro-nanointragranular pore. (g) Tn-18: sandy mudstone and intergranular pore. (h) Tn-18: sandy mudstone and intragranular pore. (i) Tn-18: pure mudstone and clay mineral pore. (j) Tn-18: pure mudstone and clay mineral pore. (k) St-1: pure mudstone and organic matter. (l) St-1: silty mudstone and organic matter pore.

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