Study on Micro-Nano Pore Characteristics and Classification of Tight Sandstone Reservoir Based on Q-Cluster

Table 1

Petrophysical profile of tight sandstone samples.

Number	Sample number	Depth/m	Lithology	Helium porosity/%	Permeability/×10^-3 μm^2	Connected pore volume/%
1	Z132-1	1855.6	Fine sandstone	10.74	0.399	91.00
2	Z132-2	1895.7	Fine sandstone	5.88	0.002	42.35
3	Y7	1782	Fine sandstone	6.84	0.003	85.71
4	F42	1905	Fine sandstone	9.30	0.140	43.63
5	F381-1	1917.5	Fine sandstone	4.55	0.003	63.40
6	F381-2	1892.5	Fine sandstone	6.88	0.003	23.10
7	S51	1686.1	Fine sandstone	6.20	0.008	19.92
8	Z57	2049.1	Fine sandstone	7.47	0.107	79.81
9	F50	1810.4	Fine sandstone	9.92	0.004	12.70
10	Z48	1949.4	Fine sandstone	4.38	0.001	33.30