Differential Occurrence Characteristics and Influence Factors of Reservoir Movable Fluids in Tight Gas: A Case Study of Shan 1 Reservoir in Yanchang Area

Table 2

Capillary pressure parameters and fluid flow property in reservoir.

Reservoir classification	Porosity (%)	Permeability (10^-3 μm)	Displacement pressure (MPa)	Median saturation pressure (MPa)	Maximum pore radius (μm)	Average pore radius (μm)	Median pore radius (μm)	Maximum mercury saturation (%)	Sorting coefficient	Movable fluid saturation (%)
I
Maximum value	14.55	1.72	1.45	5.11	2.22	0.77	0.56	88.30	5.65	69.62
Minimum value	6.30	0.02	0.33	1.35	0.52	0.33	0.14	73.14	1.52	64.45
Average value	9.08	0.39	0.71	2.88	1.26	0.50	0.31	81.26	2.97	67.04
II
Maximum value	10.63	0.31	23.86	159.08	1.10	0.35	0.20	83.83	7.08	47.35
Minimum value	2.18	0.03	0.67	3.72	0.03	0.02	0.01	48.67	1.30	21.64
Average value	6.94	0.19	3.23	23.31	0.50	0.16	0.09	70.81	1.97	34.48
III
Maximum value	5.50	0.15	21.59	131.71	0.47	0.11	0.02	66.24	4.47	36.64
Minimum value	2.61	0.05	1.57	45.27	0.03	0.02	0.01	46.35	1.34	27.78
Average value	3.93	0.08	6.36	80.14	0.19	0.07	0.01	54.29	2.24	32.58
IV
Maximum value	3.55	0.15	65.85	/	0.21	0.07	/	27.65	3.36	34.94
Minimum value	2.11	0.04	3.43	/	0.01	0.07	/	23.06	2.64	25.39
Average value	2.63	0.09	30.69	/	0.10	0.07	/	25.32	2.96	29.69