Experimental Study on the Damage of Artificial Fracture Permeability in Coal during the Flow Back of Guar-Based Fracturing Fluid

<div>Distribution of pulverized coal particles in proppant pack. (a) Pulverized coal particles in ceramic proppant. (b) Pulverized coal particles in quartz sand proppant.</div>

Geofluids

fig11

Figure 11

Figure 11: Experimental Study on the Damage of Artificial Fracture Permeability in Coal during the Flow Back of Guar-Based Fracturing Fluid 