Evolution of Friction and Permeability in a Propped Fracture under Shear

Figure 12

Evolution of (a) permeability, (b) normalized permeability (with respect to the initial permeability value), and (c) friction for the propped fracture during shearing for two different sandwiching fracture rock types: shale and granite with displacement; (d) particle size distributions (PSD) of proppants both before and after the experiments. The confining stress is 3 MPa and the proppant size is 40/80 mesh for both cases.

(a)

(b)

(c)

(d)