Experimental Study on Adsorption Pore Structure and Gas Migration of Coal Reservoir Using Low-Field Nuclear Magnetic Resonance

Table 2

Relationship between the quantity of polymorphic methane and gas pressures.

Gas pressure (MPa)	Peak area of M1	Peak area of M2	Peak area of M3
0	0	0	0
1.01	3617.42	1340.14	0
1.46	4368.66	1558.54	752.59
2.47	4935.18	2878.02	1678.89
5.55	5615.57	7542.93	4484.58
6.32	6136.92	8692.66	5196.03