Using BIB-SEM Imaging for Permeability Prediction in Heterogeneous Shales

Table 4

Overview of parameters received through the pore shape analysis. All parameters excluding cracks (as well as the power law exponent) are also given above the practical pore resolution of 18 pixels (PPR).

Sample	Mosaic map	Magnification	Area [µm^2]	Number of pores		Visible porosity		Avg. circularity		Avg. AR		D
				total	>PPR	total [%]	>PPR [%]	total	>PPR	total	>PPR
NJ-001	Map #1	10,000x		32,187	12,228	2.01	1.72	0.60	0.31	0.55	0.40	2.36
	Map #2	20,000x		21,507	5,313	1.43	1.21	0.60	0.32	0.60	0.48	2.12
	Map #3	20,000x		76,740	8,519	1.83	1.38	0.59	0.31	0.67	0.45	2.32
NJ-019	Map #1	20,000x		2,331	904	0.53	0.47	0.50	0.26	0.44	0.22	2.02
	Map #2	20,000x		4,562	1,559	0.85	0.79	0.52	0.23	0.47	0.29	1.87
	Map #3	20,000x		4,368	1,632	0.45	0.40	0.52	0.30	0.46	0.29	2.03
NJ-023	Map #1	20,000x		853	241	0.07	0.07	0.60	0.55	0.65	0.50	1.84