Effect of the Angle between Hydraulic Fracture and Natural Fracture on Shale Gas Seepage

Figure 5

Pressure nephograms with the angle of 45° between hydraulic fracture and natural fracture. (a) t = 0 d. (b) t = 20 d. (c) t = 40 d. (d) t = 60 d. (e) t = 80 d. (f) t = 100 d.

(a)

(b)

(c)

(d)

(e)

(f)