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

<div>Evolution of the proppant pillar profile for different pressure gradients: (a) pressure difference 64 kPa, (b) pressure difference 128 kPa, (c) pressure difference 256 kPa, and (d) pressure difference 512 kPa.</div>

Geofluids

fig15

Figure 15

Figure 15: DEM-CFD Modeling of Proppant Pillar Deformation and Stability during the Fracturing Fluid Flowback 