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

Table 2

Nuclear magnetic resonance results of tight sandstone in the 4th formation of Quan.

Number	Sample number	Nuclear magnetic resonance of water saturation of core (%)				Centrifugal analysis of movable fluid saturation controlled by different throat radius (μm) intervals (%)
		21 psi (1.0 μm)	42 psi (0.5 μm)	208 psi (0.10 μm)	417 psi (0.05 μm)	>1.0	1.0~0.5	0.5~0.10	0.10~0.05	<0.05
1	Z132-1	76.34	65.51	53.2	48.51	23.66	10.83	12.31	4.69	51.49
2	Z132-2	98.96	97.58	95.72	94.41	1.04	1.38	1.86	1.32	5.59
3	Y7	97.37	93.05	88.16	83.97	2.63	4.32	4.89	4.19	16.03
4	F42	96.22	91.55	71.54	64.71	3.78	4.67	20.02	6.83	35.29
5	F381-1	97.94	94.19	89.47	85.11	2.06	3.75	4.72	4.36	14.89
6	F381-2	98.29	95.94	92.19	88.17	1.71	2.35	3.75	4.02	11.83
7	S51	94.68	92.98	90.96	89.71	5.32	1.7	2.02	1.25	10.29
8	Z57	94.45	90.81	85.79	81.69	5.55	3.64	5.02	4.1	18.31
9	F50	98.6	96.16	93.18	91.38	1.4	2.44	2.98	1.8	8.62
10	Z48	97.8	96.56	93.93	92.05	2.2	1.24	2.63	1.88	7.95