Pore Structure and Fluid Uptake of the Springer/Goddard Shale Formation in Southeastern Oklahoma, USA

Table 2

Pore structure parameters from MICP analyses for Springer shale samples.

Sample ID	Bulk density (g/cm^3)	Skeletal density (g/cm^3)	Porosity (%)	Total pore area (m^2/g)	Total pore volume (mm^3/g)	Mercury retaining ratio (%)	Median pore-throat diameter (nm)		Average pore-throat diameter (nm), 4 V/A	Critical pore-throat diameter (nm)	Pore-throat diameter (%)									2.8–10 nm pore-throat network
							By volume (V)	By area (A)			10–50 μm	1–10 μm	0.1–1 μm	50–100 nm	10–50 nm	5–10 nm	2.8–5 nm	2.8–50 nm	<13.2 nm	Permeability, (nD)	Effective tortuosity,	Geometrical tortuosity,
A-12847	2.30	2.47	6.91	14.9	30.0	64.4	7.6	6.5	8.1	9.19	0.88	1.83	4.77	3.30	42.7	35.7	10.8	89.2	56.0	23.6	578	6.32
A-12871	2.19	2.36	7.17	14.9	32.7	76.6	9.5	7.1	8.8	10.1	0.34	1.94	3.80	2.71	53.0	31.5	6.71	91.2	46.5	25.7	349	5.00
A-12871	2.42	2.58	6.00	14.8	24.8	73.0	6.6	5.3	6.7	7.09	0.33	0.46	4.12	2.60	29.5	46.5	16.5	92.5	68.9	12.0	386	4.81
B-12946	2.67	2.81	5.27	8.07	19.8	59.9	11.6	6.6	9.8	11.4	0.60	3.86	9.50	5.67	48.1	23.4	8.88	80.4	37.2	24.9	397	4.58
B-13010	2.28	2.43	6.23	16.7	27.3	80.9	6.2	5.3	6.5	7.09	1.06	1.29	4.40	1.87	22.9	51.8	16.7	91.4	74.4	14.0	850	7.27
B-13047	2.41	2.47	2.48	10.3	7.29	65.2	5.3	4.2	5.7	5.20	6.10	0.7	1.80	1.93	17.4	36.9	35.1	89.4	75.5	2.72	3576	9.39
Avg ± stnd dev^a	2.31 ± 0.16	2.47 ± 0.15	6.59 ± 0.83	14.9 ± 0.09	28.8 ± 5.59	74.8 ± 2.55	8.05 ± 2.05	6.20 ± 1.27	7.75 ± 1.48	8.60 ± 2.13	0.34 ± 0.01	1.20 ± 1.04	3.96 ± 0.23	2.65 ± 0.07	41.3 ± 16.6	39.0 ± 10.6	11.6 ± 6.93	91.8 ± 0.91	57.7 ± 15.9	18.8 ± 9.72	367 ± 25.8	4.91 ± 0.13
Avg ± stnd dev^b	2.38 ± 0.17	2.52 ± 0.16	5.68 ± 1.71	13.3 ± 3.33	23.6 ± 9.16	70.0 ± 8.10	7.80 ± 2.35	5.83 ± 1.08	7.60 ± 1.56	8.35 ± 2.29	1.55 ± 2.25	1.68 ± 1.22	4.73 ± 2.56	3.01 ± 1.41	35.6 ± 14.4	37.6 ± 10.2	15.8 ± 10.3	89.0 ± 4.40	59.7 ± 15.8	17.2 ± 9.16	1023 ± 1265	6.23 ± 1.86
Dup of A-12871, avg stnd dev	2.31	2.47	6.59	14.86	28.75	74.80	8.05	6.20	7.75	8.60	0.34	1.20	3.96	2.65	41.26	39.00	11.60	91.85	57.69	18.83	367.25	4.91
	0.16	0.15	0.83	0.09	5.59	2.55	2.05	1.27	1.48	2.13	0.01	1.04	0.23	0.07	16.62	10.61	6.93	0.91	15.90	9.72	25.81	0.13
All samples, avg stnd dev	2.38	2.52	5.68	13.28	23.65	70.00	7.80	5.83	7.60	8.35	1.55	1.68	4.73	3.01	35.60	37.64	15.78	89.02	59.73	17.15	1022.58	6.23
	0.17	0.16	1.71	3.33	9.16	8.10	2.35	1.08	1.56	2.29	2.25	1.22	2.56	1.41	14.42	10.23	10.29	4.40	15.78	9.16	1264.78	1.86

^aDuplicate measurements of A-12871. ^bAverage standard deviations for all sample runs excluding B-13047.