Conventional Mercury Penetration and Constant Velocity Mercury Penetration Experiments Are Used to Quantitatively Characterize the Difference in Micropore Structure in Low Permeability Reservoirs and Its Influence on Movable Fluid Saturation

Table 2

Typical parameters of micropore structure.

Layer	Sample number	Maximum throat radius (μm)		Mean throat radius (μm)		Sorting coefficient		②-①
								Maximum throat radius (μm)	Mean throat radius (μm)	Sorting coefficient
		①	②	①	②	①	②
C 6	X10	2.54	3.48	0.17	1.22	2.91	0.91	0.94	1.05	-2.00
	X13	1.69	2.24	0.32	0.72	2.70	0.54	0.55	0.40	-2.16
	X15	1.00	1.30	0.08	0.59	2.03	0.26	0.30	0.51	-1.77
	X18	0.64	0.85	0.05	0.46	2.45	0.17	0.21	0.41	-2.28
	X26	1.60	1.78	0.22	0.71	2.40	0.38	0.18	0.49	-2.02
	X27	0.63	0.76	0.06	0.37	2.22	0.14	0.13	0.31	-2.08
	X28	0.63	0.87	0.12	0.41	2.54	0.20	0.24	0.30	-2.34
	X39	2.51	2.84	0.08	0.90	2.51	0.62	0.32	0.81	-1.89
C 7	D8	0.40	0.60	0.09	0.39	1.33	0.19	0.20	0.29	-1.14
	D18	0.40	0.50	0.12	0.35	0.85	0.22	0.10	0.23	-0.63
	D23	0.40	0.70	0.09	0.40	1.15	0.24	0.30	0.32	-0.91
	D44	0.49	1.70	0.15	0.41	1.09	0.51	1.21	0.27	-0.59

Notes: ①, conventional mercury penetration; ②, constant velocity mercury penetration.