Research on the Characteristics of Microscopic Damage to Different Pore Types by Slippery Water Fracturing Fluid in the Chang Member Tight Sandstone Reservoir, Ordos Basin, NW China

Figure 4

Changes in the degree of openness of typical pores and fractures at different times (Note: (a) snapshot following initial saturation with formation water; (b) 9 h after fracturing fluid invasion; (c) 24 h after fracturing fluid invasion; (d) 72 h after fracturing fluid invasion; (e) 24 h after subsequent water flooding).

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