Micropore Throat Structure and Movable Fluid Characteristics of Chang 6₃ Tight Sandstone in Baibao Area of Ordos Basin

Table 1

NMR test results.

No.	Nuclear magnetic porosity (%)	Permeability (10^-3 μm^2)	Movable fluid porosity (%)	cutoff (ms)	geometric mean (ms)	Movable fluid saturation (%)
1	3.7	/	0.2	41.5	0.6	4.7
9	7.6	0.024	1.6	9.7	1.5	21.0
14	10.7	0.147	2.8	10.4	2.3	25.0
21	4.2	0.001	0.5	47.7	1.4	12.2
24	6.5	/	0.1	95.0	1.3	0.9
29	7.8	0.009	1.1	58.7	2.7	13.3
30	5.0	0.001	0.4	12.8	0.7	7.6
32	11.7	1.412	5.5	4.2	2.6	46.6
34	6.5	0.002	0.7	22.2	1.5	10.0
35	9.6	0.073	2.2	10.4	2.2	22.5
36	1.9	/	0.0	150.0	0.5	1.1
37	3.3	/	0.1	23.8	0.8	3.1
41	7.6	0.036	1.9	8.4	1.6	24.9
45	5.6	0.003	0.8	9.7	0.8	14.2
47	10.7	0.191	3.0	9.0	2.2	27.7