Pattern Recognition of the Vertical Hydraulic Fracture Shapes in Coalbed Methane Reservoirs Based on Hierarchical Bi-LSTM Network

Figure 4

The pattern of the vertical hydraulic fracture shapes. (a1) Short-wide fracture. (b1) Long-Narrow fracture. (c1) Multiple-narrow fracture. (d1) High-short fracture. (a2) Short-wide fracture. (b2) Long-narrow fracture. (c2) Multiple-narrow fracture. (d2) High-short fracture.