Mechanical-Chemical-Mineralogical Controls on Permeability Evolution of Shale Fractures

Table 2

Comparison of topography between artificial samples and Sc-CO₂-fractured samples.

Sample description	(μm)	(μm)
Sc-CO2 fractured	18.32	23.03
10 grit silicon carbide polished	21.39	26.88
20 grit silicon carbide polished	18.44	23.99
30 grit silicon carbide polished	17.99	21.77
60 grit silicon carbide polished	15.22	19.34