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

<div>Influence of various proppant layers on permeability damage rate. (a) Permeability damage rate before brine flushing. (b) Permeability damage rate after brine flushing.</div>

Geofluids

fig6

Figure 6

Figure 6: Experimental Study on the Damage of Artificial Fracture Permeability in Coal during the Flow Back of Guar-Based Fracturing Fluid 