Study on the Flow Mechanism of Shale Oil with Different Injection Media

Table 2

Contribution ratio of pore recovery degree at different relaxation times.

Serial number	Lithology	Relaxation time (ms)	Contribution ratio of recovery degree (%)
			1 h	4 h	10 h	24 h	3 d	One week	Two weeks
1	Shale (formation water)	<10	34.31	46.61	80.52	85.67	90.15	92.15	95.67
		10∼100	13.04	13.74	2.35	2.00	1.57	1.05	0.06
		>100	52.63	39.64	17.13	12.33	8.28	6.80	4.27
2	Shale (active water)	<10	74.80	80.44	85.74	90.47	95.66	97.53	97.88
		10∼100	12.31	12.88	9.98	6.95	1.86	0.56	0.23
		>100	12.89	6.68	4.28	2.58	2.48	1.91	1.89
3	Tight sandstone (formation water)	<10	51.66	54.31	57.08	59.64	66.74	65.53	62.51
		10∼100	33.09	21.54	22.21	20.99	28.78	27.85	30.49
		>100	15.25	24.15	20.71	19.37	4.48	6.62	7.00