Using BIB-SEM Imaging for Permeability Prediction in Heterogeneous Shales

Table 5

Experimental permeabilities (intrinsic) as well as modeled permeabilities (cumulated and upscaled, resp.). Cumulated values show the modeled permeability of each mosaic map derived from the CTM. Upscaled values were normalized (weighted average) to characteristic layer proportions of a whole plug surface (Figure 8). Total includes every visible pore, while corrected only accounts for pores above the PPR and excludes microcracks as well as IntraP-pores in albite in some maps. Marked values () feature these maps where relatively large IntraP-pores in albite were subtracted from the calculated permeabilities (Figure 13).

Sample	Map	Major element	Intrinsic k [nD]	Cumulated k [nD]		Upscaled [nD]
				Total	Corrected	Total	Corrected
NJ-001	Map #1	Na	160.3	800.8		665.8	310.1
	Map #2	Ca		537.6
	Map #3	S		38.4	37.6
NJ-019	Map #1	Ca	43.1	7.9	3.0	323.1	43.1
	Map #2	Na		1,208.4
	Map #3	K		14.5	13.3
NJ-023	Map #1	—	3.9	2.3	2.3	2.3	2.3