DEM-CFD Modeling of Proppant Pillar Deformation and Stability during the Fracturing Fluid Flowback

Figure 26

Evolution of proppant pillar profile for different pillar diameter to spacing ratios: (a) 0.25, (b) 0.43, (c) 67, (d) 0.70, (e) 0.80, (f) 0.90, (g) 1.00, (h) 1.50, (i) 2.33, and (j) 4.00.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)