Pyrolysis of coal measure source rocks at highly to over mature stage and its geological implications

GAO Jinliang,NI Yunyan,LI Wei,YUAN Yilin

Table 1 The yields and carbon and hydrogen isotopic compositions of gaseous products formed in pyrolysis experiments.

Series	Temperature/°C	Coal/mg	Water/mg	R_o/%	Absolute yield/(mg·g^-1)									Mole ratio of C₁ and C_1-5	δ¹³C/‰				δ²H/‰
Series	Temperature/°C	Coal/mg	Water/mg	R_o/%	CO₂	CH₄	C₂H₆	C₃H₈	C₄H₁₀	C₅H₁₂	H₂	H₂S	C_1-5	Mole ratio of C₁ and C_1-5	CO₂	CH₄	C₂H₆	C₃H₈	CH₄	C₂H₆
Without water	400	120.9		1.75	57.91	18.61	5.68	1.63	0.28	0.03	0.03	0.03	26.23	0.83	-16.8	-30.2	-22.5	-20.5	-300.5	-208.2
	430	104.5		2.27	64.68	29.11	4.99	0.56	0.06	0.12	0.06	0.02	34.83	0.91	-16.5	-28.4	-19.6	-13.7	-278.4	-140.2
	450	79.0		2.66	69.01	37.22	3.67	0.12			0.07		41.01	0.95	-15.9	-27.0	-15.7	-6.2	-254.0	-124.4
	500	60.0		3.64	74.53	58.81	0.46				0.13		59.27	1.00	-15.0	-24.1	-8.9	-14.5	-180.8	-148.0
	550	49.8		4.34	91.04	71.77	0.21				0.27		71.98	1.00	-16.2	-22.4	-14.4	-16.6	-164.1	-148.0
With water	400	122.4	25.3	1.75	72.09	19.23	6.83	2.73	0.57	0.07	0.06	0.06	29.42	0.80	-16.7	-30.2	-22.7	-20.9	-282.4	-204.3
	430	102.4	20.0	2.27	86.30	33.17	7.69	1.49	0.16	0.02	0.09	0.09	42.52	0.88	-16.5	-28.1	-20.9	-16.5	-268.2	-131.3
	450	79.1	16.7	2.66	92.03	43.01	6.42	0.50	0.02		0.15		49.95	0.92	-17.2	-27.0	-18.1	-9.3	-247.2	-105.4
	500	62.1	12.7	3.64	97.83	67.10	1.31	0.01			0.25		68.43	0.99	-15.4	-23.8	-5.7	-12.6	-168.7	-111.0
	550	51.2	10.0	4.34	126.70	89.61	0.38				0.51		89.99	1.00	-16.5	-22.1	-11.9	-13.2	-135.4	-123.0