Experimental Study on Physical Characteristics of Deep Rocks at Different Depths in Songliao Basin

Table 4

Porosity measured by the NMR method.

Depth/m	Porosity (%)				Average porosity (%)
4900	2.5	2.5	3	1.3	2.325
5400	2.5	1.7	1	/	1.733
5700	2.2	0.9	1.7	/	1.6
6000	1	1.4	0.4	1	0.95
6250	0.75	0.67	1.1	/	0.84
6500	0.34	0.95	0.93	/	0.74
6700	0.82	0.75	1.2	0.43	0.8
6830	0.52	1.2	0.4	/	0.707