Fracability Evaluation Method and Influencing Factors of the Tight Sandstone Reservoir

Figure 8

Injection pressure nephogram: (a) 0.10 s during injection, (b) 9.70 s during injection, (c) 50.46 s during injection, (d) 100 s during injection, (e) 5.13 s after injection stop, and (f) 2400 s after injection stop.

(a)

(b)

(c)

(d)

(e)

(f)