The significance of coal-derived gas in major gas producing countries

DAI Jinxing,NI Yunyan,LIAO Fengrong,HONG Feng,YAO Limiao

Table 1 R_o and organic maceral of coal samples from the Turpan-Hami, Gippsland and Barito basins.

Basin	Coal seam		R_o/%		Vitrinite/%		Inertinite/%		Exinite/%		Reference
Basin	Coal seam		Range	Average	Content	Average	Content	Average	Content	Average	Reference
Tuha	J		0.34-1.83	0.75	4.8-98.4	74.0	0-67.4	15.3	0-94.6*	10.7	[17]
					60-95		5-40		5-30*	10	[30]
					50-90	70	2-67	20	<10	7	[33]
					40-95	60-80	0.4-39.0	10-25	0.8-23.0	5-15	[34]
Gippsland	K₂-E	I	0.46-1.20	1.00	87-92	89	1-5	2.5	1-5	6	[35]
		II			30-85	61	5-60	32	2-15	5
		III			60-95	86	0-5	2	2-25	8
		IV			50-98	92	0-4	1	2-45	8
Barito	N₁			0.52	72-99	83	0-7	3	1-24	13	[36]
Barito	E₂			0.52	40-100	83	6-7	3	0-52	14	[36]