Pore Structure Characteristics, Genesis, and Its Controlling Effect on Gas Migration of Quaternary Mudstone Reservoir in Qaidam Basin

Table 2

Pore volume and specific surface area of mudstone of Qigequan Formation.

Sample number	Pore volume (ml/g)		Surface area (m^2/g)		The proportion of volume (%)		The proportion of surface area (%)
	Mesopore	Macropore	Mesopore	Macropore	Mesopore	Macropore	Mesopore	Macropore
H-1	0.052	0.058	15.338	3.034	46.88	53.12	83.49	16.51
H-2	0.031	0.049	12.447	2.308	39.15	60.85	84.36	15.64
H-3	0.072	0.053	25.781	2.490	57.79	42.21	91.19	8.81
H-4	0.024	0.131	7.400	2.150	15.38	84.62	77.49	22.51
H-5	0.077	0.046	21.661	1.509	62.36	37.64	93.49	6.51
H-6	0.050	0.077	15.975	2.201	39.08	60.92	87.89	12.11
H-7	0.009	0.220	2.788	0.519	3.74	96.26	84.30	15.70
H-8	0.025	0.220	7.913	4.130	10.04	89.96	65.71	34.29
Average	0.042	0.107	13.663	2.293	34.30	65.70	83.49	16.51