Distribution and Application of Nitrogen and Oxygen Containing Compounds in the Saline Lacustrine Oils from the Dongpu Sag

doi:10.19657/j.geoscience.1000-8527.2019.06.01

Abstract

Abstract:

Heteroatomic compounds in saline lacustrine in the Dongpu Sag are weakly documented. ESI FT-ICR MS combined with GC/MS were utilized to reveal oxygen and nitrogen compounds in the saline lacustrine oils and source rocks in the sag. Abundant NO compounds were detected and dominated by N₁, O₁ and O₂ class species. It was observed that the relative abundance of the N₁ and O₁ species increased with increasing maturity, while the contents of O₂ species decreased with increasing maturity. It was also observed that there is an apparent increase in the condensation degree and a decrease in the carbon number of the N₁, O₁ and O₂ species with increasing of maturity. Several indices including DB₁₅⁺/DBE₁₄^--N₁ having a good relationship with calculated vitrinite reflection (R_c). Oil-oil and oil-source rock correlations based on-ESI FT-ICR MS showed that, the majority of the saline lacustrine oils in the northern Dongpu Depression was sourced from the relatively mature source rocks. It was proved that nitrogen and oxygen containing compounds have a good application prospect in maturity evaluation, source rock and hydrocarbon migration tracing.

Key words: Dongpu Sag, saline lacustrine oil, nitrogen/oxygen compounds, high resolution mass

CLC Number:

TE122.1

LI Sumei, XU Tianwu, SHI Quan, ZHANG Yunxian, WU Jianxun, KE Changwei. Distribution and Application of Nitrogen and Oxygen Containing Compounds in the Saline Lacustrine Oils from the Dongpu Sag[J]. Geoscience, 2019, 33(06): 1137-1150.

Figures/Tables 10

Table 1 Basic geochemical characteristics for the crude oils and source rocks analyzed in the Dongpu Sag

地区	井号	井段/m	层位		CPI	OEP	Pr/ Ph	G	C₃₅/ C₃₄	20S	αββ	Ts	Dia/ Reg	MPI₁	TMNr	TeMNr	R_c/ %
文留油田	W13-281	3 377.3~3 453.3	E $s 3 Z$	原油	0.97	1.01	0.53	0.54	1.15	0.54	0.53	0.39	0.29	0.47	0.56	0.59	0.68
	W13-319	3 417.4~3 689.5	E $s 3 Z$	原油	1.01	1.01	0.49	0.57	1.27	0.53	0.51	0.42	0.3	0.48	0.57	0.59	0.69
	W13-429	3 282.1~3 288.1	E $s 3 S$	原油	0.95	1.03	0.41	0.81	0.97	0.48	0.40	0.32	0.13	0.54	0.41	0.42	0.72
	W203-44	3 788.1~3 792.8	E $s 3 X$	原油	1	0.98	0.64	1.72	0.73	0.54	0.69	0.77	0.78	0.73	0.89	0.90	0.84
	W203-10	3 275.3~3 771.9	E $s 3 z$	原油	0.97	1	0.53	0.61	1.15	0.57	0.55	0.47	0.29	0.51	0.67	0.68	0.70
	W203-58	3 770.6~4 081.9	E $s 3 z$	原油	0.96	1.02	0.53	1.06	1.39	0.40	0.67	0.48	0.27	0.51	0.69	0.69	0.70
	W203-63	4 360.6~4 414.4	E $s 3 z$	原油	0.99	1.07	0.61	2.38	0	0.67	0.64	0.68	0.52	0.94	0.89	0.85	0.96
	W25-98	2 326.4~2 405.6	E $s 2 x$	原油	1.01	1.07	0.44	0.56	1.11	0.40	0.36	0.26	0.11	0.45	0.39	0.39	0.67
	W92-60	2 673~2 824	E $s 3 S$	原油	0.93	1.01	0.43	0.87	1.13	0.41	0.36	0.29	0.12	0.43	0.43	0.38	0.66
	W72-53	3 273.4~3 527	E $s 3 Z$	原油	0.94	0.99	0.37	0.70	1.08	0.49	0.42	0.31	0.17	0.55	0.40	0.42	0.73
	W138-10	2 919.1~2 942.4	Es₁	原油	0.97	0.85	0.20	0.93	1.11	0.24	0.21	0.11	0.08	0.54	0.46	0.39	0.72
	W88-59	3 515.1~3 877.5	E $s 3 Z$	原油	0.97	1.09	0.72	0.75	1.29	0.53	0.55	0.51	0.37	1.03	0.71	0.77	1.02
文 \| 濮 \| 卫	P1-120	2 241.4~2 408.4	Es₁	原油	0.93	1.07	0.41	0.74	1.26	0.31	0.29	0.27	0.11	0.64	0.46	0.43	0.78
	P7-18	3 233.5~3 517	E $s 3 Z$	原油	0.96	0.88	0.50	0.54	1.15	0.46	0.37	0.3	0.14	0.48	0.38	0.42	0.69
	W42-26	3 451~3 466.6	E $s 3 Z$	原油	0.98	0.9	0.62	0.54	0.78	0.43	0.33	0.25	0.13	0.44	0.27	0.31	0.67
	M85	1 612.2~1 630	E $s 2 S$	原油	0.92	0.91	0.39	0.73	1.64	0.32	0.28	0.24	0.11	0.46	0.44	0.41	0.68
	W77-10	2 734~2 799	Es₄-P	原油	0.90	0.92	0.42	0.73	1.6	0.34	0.28	0.22	0.11	0.46	0.43	0.39	0.68
	PS20	4 329.5~4 556.1	E $s 3 Z$	原油	1.00	0.97	0.63	0.78	1.24	0.60	0.55	0.49	0.29	0.56	0.70	0.74	0.74
胡 \| 柳	PS18	3 886.4~4 237.1	E $s 3 Z$	原油	0.96	0.94	0.52	0.77	1.44	0.55	0.60	0.66	0.46	0.8	0.90	0.91	0.88
	PS18-2	4 167~4 207.3	E $s 3 Z$	原油	0.96	1	0.54	2.23	0.32	0.46	0.69	0.73	0.86	0.89	0.94	0.91	0.93
	H96-3	4 039.3~4 105.5	E $s 3 Z$	原油	0.93	0.94	0.49	1.20	0	0.58	0.62	0.39	0.64	0.79	0.91	0.91	0.87
南部	C24-1	2 714.8~2 727.9	E $s 3 Z$	原油	1.01	1.19	1.21	0.25	0.69	0.45	0.40	0.37	0.19	0.53	0.57	0.52	0.72
南部	M19-30	2 848.4~2 900.6	E $s 3 Z$	原油	1.04	1.03	1.19	0.22	0.75	0.52	0.48	0.42	0.28	0.58	0.68	0.64	0.75
卫城	W18-5	2 657.55	E $s 3 Z$	油砂	0.89	0.80	0.22	0.76	1.63	0.34	0.30	0.18	0.11	0.48	/	0.30	0.69
	W18-5	2 715.39	E $s 3 X$	油砂	0.96	0.83	0.24	0.68	1.49	0.36	0.30	0.24	0.12	0.63	/	0.24	0.78
	W18-5	2 904.01	E $s 3 X$	油砂	0.99	0.99	0.22	0.63	1.52	0.33	0.29	0.21	0.11	0.75	0.26	0.34	0.85
	W79-8	3 363.96	E $s 3 X$	油砂	0.88	0.76	0.19	0.97	1.59	0.53	0.40	0.18	0.11	0.53	/	0.31	0.72
	W79-8	3 456.16	E $s 3 X$	油砂	1.01	0.9	0.14	0.62	0.46	0.50	0.45	0.5	0.27
濮 \| 卫	WQ1	2 588.39	E $s 3 Z$	油页岩	1.51	1.75	0.09	0.24	0.85	0.18	0.22	0.21	0.07	0.61	/	0.22	0.76
	W18-5	2 661.55	E $s 3 Z$	页岩	0.83	0.69	0.30	0.83	1.54	0.36	0.41	0.24	0.12	0.38	0.12	0.32	0.63
	W18-5	2 712.82	E $s 3 X$	页岩	0.92	0.82	0.36	0.59	1.49	0.27	0.26	0.25	0.11	0.64	/	0.25	0.78
	W18-5	2 933.49	E $s 3 X$	泥页岩	1.16	1.06	0.64	0.48	0.96	0.26	0.25	0.29	0.13	0.64	/	0.15	0.78
	W79-8	3 368.01	E $s 3 X$	泥页岩	0.95	0.84	0.34	0.43	0.63	0.27	0.23	0.27	0.07	0.46	0.02	0.32	0.67
	W79-8	3 467.50	E $s 3 X$	泥页岩	1.06	1.07	0.38	2.41	0.73	0.44	0.49	0.34	0.24	0.66	/	0.19	0.8
	W311	3 619.90	E $s 3 X$	泥页岩	0.76	0.77	0.38	0.82	2.47	0.50	0.62	0.49	0.45	0.41	0.24	0.38	0.65
	W452	3 923.54	E $s 3 X$	泥岩	0.9	0.79	0.83	0.17	0.92	0.52	0.54	0.56	0.94	0.52	0.13	0.33	0.71
	PS20	4 440.27	E $s 3 X$	泥岩	0.98	0.96	0.75	2.90	1.57	0.49	0.47	0.73	1.02	0.54	/	0.54	0.72
	PS20	4 555.28	E $s 3 X$	页岩	1.04	0.98	0.85	2.07	1.1	0.20	0.22	0.81	0.32	0.64	0.31	0.65	0.79

Table 1 Basic geochemical characteristics for the crude oils and source rocks analyzed in the Dongpu Sag

地区	井号	井段/m	层位		CPI	OEP	Pr/ Ph	G	C₃₅/ C₃₄	20S	αββ	Ts	Dia/ Reg	MPI₁	TMNr	TeMNr	R_c/ %
文留油田	W13-281	3 377.3~3 453.3	E $s 3 Z$	原油	0.97	1.01	0.53	0.54	1.15	0.54	0.53	0.39	0.29	0.47	0.56	0.59	0.68
	W13-319	3 417.4~3 689.5	E $s 3 Z$	原油	1.01	1.01	0.49	0.57	1.27	0.53	0.51	0.42	0.3	0.48	0.57	0.59	0.69
	W13-429	3 282.1~3 288.1	E $s 3 S$	原油	0.95	1.03	0.41	0.81	0.97	0.48	0.40	0.32	0.13	0.54	0.41	0.42	0.72
	W203-44	3 788.1~3 792.8	E $s 3 X$	原油	1	0.98	0.64	1.72	0.73	0.54	0.69	0.77	0.78	0.73	0.89	0.90	0.84
	W203-10	3 275.3~3 771.9	E $s 3 z$	原油	0.97	1	0.53	0.61	1.15	0.57	0.55	0.47	0.29	0.51	0.67	0.68	0.70
	W203-58	3 770.6~4 081.9	E $s 3 z$	原油	0.96	1.02	0.53	1.06	1.39	0.40	0.67	0.48	0.27	0.51	0.69	0.69	0.70
	W203-63	4 360.6~4 414.4	E $s 3 z$	原油	0.99	1.07	0.61	2.38	0	0.67	0.64	0.68	0.52	0.94	0.89	0.85	0.96
	W25-98	2 326.4~2 405.6	E $s 2 x$	原油	1.01	1.07	0.44	0.56	1.11	0.40	0.36	0.26	0.11	0.45	0.39	0.39	0.67
	W92-60	2 673~2 824	E $s 3 S$	原油	0.93	1.01	0.43	0.87	1.13	0.41	0.36	0.29	0.12	0.43	0.43	0.38	0.66
	W72-53	3 273.4~3 527	E $s 3 Z$	原油	0.94	0.99	0.37	0.70	1.08	0.49	0.42	0.31	0.17	0.55	0.40	0.42	0.73
	W138-10	2 919.1~2 942.4	Es₁	原油	0.97	0.85	0.20	0.93	1.11	0.24	0.21	0.11	0.08	0.54	0.46	0.39	0.72
	W88-59	3 515.1~3 877.5	E $s 3 Z$	原油	0.97	1.09	0.72	0.75	1.29	0.53	0.55	0.51	0.37	1.03	0.71	0.77	1.02
文 \| 濮 \| 卫	P1-120	2 241.4~2 408.4	Es₁	原油	0.93	1.07	0.41	0.74	1.26	0.31	0.29	0.27	0.11	0.64	0.46	0.43	0.78
	P7-18	3 233.5~3 517	E $s 3 Z$	原油	0.96	0.88	0.50	0.54	1.15	0.46	0.37	0.3	0.14	0.48	0.38	0.42	0.69
	W42-26	3 451~3 466.6	E $s 3 Z$	原油	0.98	0.9	0.62	0.54	0.78	0.43	0.33	0.25	0.13	0.44	0.27	0.31	0.67
	M85	1 612.2~1 630	E $s 2 S$	原油	0.92	0.91	0.39	0.73	1.64	0.32	0.28	0.24	0.11	0.46	0.44	0.41	0.68
	W77-10	2 734~2 799	Es₄-P	原油	0.90	0.92	0.42	0.73	1.6	0.34	0.28	0.22	0.11	0.46	0.43	0.39	0.68
	PS20	4 329.5~4 556.1	E $s 3 Z$	原油	1.00	0.97	0.63	0.78	1.24	0.60	0.55	0.49	0.29	0.56	0.70	0.74	0.74
胡 \| 柳	PS18	3 886.4~4 237.1	E $s 3 Z$	原油	0.96	0.94	0.52	0.77	1.44	0.55	0.60	0.66	0.46	0.8	0.90	0.91	0.88
	PS18-2	4 167~4 207.3	E $s 3 Z$	原油	0.96	1	0.54	2.23	0.32	0.46	0.69	0.73	0.86	0.89	0.94	0.91	0.93
	H96-3	4 039.3~4 105.5	E $s 3 Z$	原油	0.93	0.94	0.49	1.20	0	0.58	0.62	0.39	0.64	0.79	0.91	0.91	0.87
南部	C24-1	2 714.8~2 727.9	E $s 3 Z$	原油	1.01	1.19	1.21	0.25	0.69	0.45	0.40	0.37	0.19	0.53	0.57	0.52	0.72
南部	M19-30	2 848.4~2 900.6	E $s 3 Z$	原油	1.04	1.03	1.19	0.22	0.75	0.52	0.48	0.42	0.28	0.58	0.68	0.64	0.75
卫城	W18-5	2 657.55	E $s 3 Z$	油砂	0.89	0.80	0.22	0.76	1.63	0.34	0.30	0.18	0.11	0.48	/	0.30	0.69
	W18-5	2 715.39	E $s 3 X$	油砂	0.96	0.83	0.24	0.68	1.49	0.36	0.30	0.24	0.12	0.63	/	0.24	0.78
	W18-5	2 904.01	E $s 3 X$	油砂	0.99	0.99	0.22	0.63	1.52	0.33	0.29	0.21	0.11	0.75	0.26	0.34	0.85
	W79-8	3 363.96	E $s 3 X$	油砂	0.88	0.76	0.19	0.97	1.59	0.53	0.40	0.18	0.11	0.53	/	0.31	0.72
	W79-8	3 456.16	E $s 3 X$	油砂	1.01	0.9	0.14	0.62	0.46	0.50	0.45	0.5	0.27
濮 \| 卫	WQ1	2 588.39	E $s 3 Z$	油页岩	1.51	1.75	0.09	0.24	0.85	0.18	0.22	0.21	0.07	0.61	/	0.22	0.76
	W18-5	2 661.55	E $s 3 Z$	页岩	0.83	0.69	0.30	0.83	1.54	0.36	0.41	0.24	0.12	0.38	0.12	0.32	0.63
	W18-5	2 712.82	E $s 3 X$	页岩	0.92	0.82	0.36	0.59	1.49	0.27	0.26	0.25	0.11	0.64	/	0.25	0.78
	W18-5	2 933.49	E $s 3 X$	泥页岩	1.16	1.06	0.64	0.48	0.96	0.26	0.25	0.29	0.13	0.64	/	0.15	0.78
	W79-8	3 368.01	E $s 3 X$	泥页岩	0.95	0.84	0.34	0.43	0.63	0.27	0.23	0.27	0.07	0.46	0.02	0.32	0.67
	W79-8	3 467.50	E $s 3 X$	泥页岩	1.06	1.07	0.38	2.41	0.73	0.44	0.49	0.34	0.24	0.66	/	0.19	0.8
	W311	3 619.90	E $s 3 X$	泥页岩	0.76	0.77	0.38	0.82	2.47	0.50	0.62	0.49	0.45	0.41	0.24	0.38	0.65
	W452	3 923.54	E $s 3 X$	泥岩	0.9	0.79	0.83	0.17	0.92	0.52	0.54	0.56	0.94	0.52	0.13	0.33	0.71
	PS20	4 440.27	E $s 3 X$	泥岩	0.98	0.96	0.75	2.90	1.57	0.49	0.47	0.73	1.02	0.54	/	0.54	0.72
	PS20	4 555.28	E $s 3 X$	页岩	1.04	0.98	0.85	2.07	1.1	0.20	0.22	0.81	0.32	0.64	0.31	0.65	0.79

Fig.1 Relative abundance of heteroatom class species in the oils and source rocks assigned from negative-ion ESI FT-ICR MS

Fig.2 Relative distribution of the N1, O1 and O2 species with varying DBE values of the crude oils and rock extracts from the negative-ion ESI FT-ICR MS

Fig.3 Carbon curve of the N1 species with DBE=9, 12 and 15 in the selected oils (left); Carbon curve of the O2 species with DBE = 1 in the selected oils (right)

Fig.4 Correlation of -ESI FT-ICR MS condensation parameters of 15+/DBE14--N1 and DBE15/DBE9-N1 with normal maturity parameters

Fig.5 Correlation of -ESI FT-ICR MS condensation parameters of DBE5-20/DBE1-4-O1 and DBE12-22/DBE5-6-O2 with normal maturity parameters

Fig.6 Correlation of -ESI FT-ICR MS parameters of C20-30/C31-50-DBE12-N1, C20-30/C31-50-DBE15-N1 and C20-30/C15-45-DBE1-O1 with burial depth

Table 2 Basic parameters based on -ESI FT-ICR MS for the oils and rock extracts analyzed

井号	深度/ m	层位	DBE_5-20/ DBE_1-4-O₁	DBE_12-22/ DBE_5-6-O₂	DBE₁₅/ DBE₉-N₁	DB $E 15 +$ / DB $E 14 -$ -N₁	C_20-30/C_31-50 -DBE₁₂-N₁	C_20-3/C_31-50 -DBE₁₅-N₁	C_20-30/C_15-45 -DBE₁-O₂
W13-281		E_s₃^Z	1.63	1.46	0.59	0.36	1.32	1.61	0.24
W13-319		E_s₃^Z	2.37	1.10	0.55	0.33	1.34	1.72	0.25
W13-429		E_s₃^S	1.28	2.74	0.23	0.20	0.81	0.83	0.32
W203-44		E_s₃^X	12.48	3.37	1.46	0.66	1.49	2.32	0.10
W203-10		E_s₃^Z	2.37	1.42	0.91	0.46	1.80	2.77	0.16
W203-58		E_s₃^Z	4.08	1.22	0.83	0.42	1.41	1.84	0.19
W203-63		E_s₃^Z	7.24	0.40	5.83	0.67	4.18	4.24	0.12
W25-98		E_s₃^X	2.31	0.21	0.20	0.20	1.07	0.94	0.62
W92-60		E_s₃^S	1.84	0.32	0.26	0.21	1.00	0.87	0.55
W72-53		E_s₃^Z	1.67	0.55	0.34	0.25	1.04	1.12	0.21
W138-10		Es₁	0.43	0.03	0.05	0.05	0.73	0.65	0.64
W88-59		E_s₃^Z	2.19	0.84	0.79	0.42	1.56	2.12	0.11
P1-120		Es₁	1.21	0.07	0.13	0.14	0.66	0.45	0.66
P7-18		E_s₃^Z	1.91	4.04	0.32	0.25	1.50	1.53	0.31
W42-26		E_s₃^Z	1.77	0.56	0.33	0.24	1.38	1.56	0.20
M85		E_s₃^S	1.70	0.24	0.26	0.19	1.46	1.23	0.44
W77-10		Es₄-P	1.18	0.32	0.17	0.17	0.97	0.79	0.68
PS20		E_s₃^Z	6.53	6.13	1.16	0.55	2.20	3.33	0.14
PS18		E_s₃^Z	12.89	4.00	1.77	0.61	2.14	3.68	0.13
PS18-2		E_s₃^Z	18.79	6.88	4.40	0.84	2.85	4.06	0.08
H96-3		E_s₃^Z	9.39	1.70	1.95	0.58	2.46	3.42	0.22
C24-1		E_s₃^Z	2.93	0.41	0.44	0.32	1.23	1.18	0.40
M19-30		E_s₃^Z	3.07	0.37	0.72	0.43	1.70	1.78	0.38
W18-5	2 657.55	E_s₃^Z	1.79	0.31	0.89	0.49	13.09	10.33	1.79
W18-5	2 715.39	E_s₃^X	1.16	0.28	0.29	0.16	1.56	3.29	1.16
W18-5	2 904.01	E_s₃^X	1.09	0.19	0.18	0.11	1.17	2.42	1.09
W79-8	3 363.96	E_s₃^X	0.96	0.56	0.63	0.36	2.56	3.45	0.96
W79-8	3 456.16	E_s₃^X	7.35	1.76	-	4.23	-	-	7.35
WQ1	2 588.39	E_s₃^Z	0.39	0.02	0.56	0.30	3.21	5.13	0.39
W18-5	2 661.55	E_s₃^Z	1.75	0.20	0.36	0.22	2.25	2.91	1.75
W18-5	2 712.82	E_s₃^X	1.25	0.22	1.13	0.52	2.70	4.21	1.25
W18-5	2 933.49	E_s₃^X	2.36	0.35	1.68	0.73	3.25	6.96	2.36
W79-8	3 368.01	E_s₃^X	0.57	0.38	-	4.80	-	-	0.57
W79-8	3 467.50	E_s₃^X	1.57	0.68	2.39	1.57	2.14	2.98	1.57
W311	3 619.90	E_s₃^X	1.66	0.93	7.68	5.10	1.64	4.58	1.66
W452	3 923.54	E_s₃^X	2.47	2.19	5.30	3.32	3.02	5.86	2.47
PS20	4 440.27	E_s₃^X	2.24	1.63	18.40	9.82	3.20	7.81	2.24
PS20	4 555.28	E_s₃^X	2.29	2.66	39.24	9.60	4.94	10.20	2.29

Table 2 Basic parameters based on -ESI FT-ICR MS for the oils and rock extracts analyzed

井号	深度/ m	层位	DBE_5-20/ DBE_1-4-O₁	DBE_12-22/ DBE_5-6-O₂	DBE₁₅/ DBE₉-N₁	DB $E 15 +$ / DB $E 14 -$ -N₁	C_20-30/C_31-50 -DBE₁₂-N₁	C_20-3/C_31-50 -DBE₁₅-N₁	C_20-30/C_15-45 -DBE₁-O₂
W13-281		E_s₃^Z	1.63	1.46	0.59	0.36	1.32	1.61	0.24
W13-319		E_s₃^Z	2.37	1.10	0.55	0.33	1.34	1.72	0.25
W13-429		E_s₃^S	1.28	2.74	0.23	0.20	0.81	0.83	0.32
W203-44		E_s₃^X	12.48	3.37	1.46	0.66	1.49	2.32	0.10
W203-10		E_s₃^Z	2.37	1.42	0.91	0.46	1.80	2.77	0.16
W203-58		E_s₃^Z	4.08	1.22	0.83	0.42	1.41	1.84	0.19
W203-63		E_s₃^Z	7.24	0.40	5.83	0.67	4.18	4.24	0.12
W25-98		E_s₃^X	2.31	0.21	0.20	0.20	1.07	0.94	0.62
W92-60		E_s₃^S	1.84	0.32	0.26	0.21	1.00	0.87	0.55
W72-53		E_s₃^Z	1.67	0.55	0.34	0.25	1.04	1.12	0.21
W138-10		Es₁	0.43	0.03	0.05	0.05	0.73	0.65	0.64
W88-59		E_s₃^Z	2.19	0.84	0.79	0.42	1.56	2.12	0.11
P1-120		Es₁	1.21	0.07	0.13	0.14	0.66	0.45	0.66
P7-18		E_s₃^Z	1.91	4.04	0.32	0.25	1.50	1.53	0.31
W42-26		E_s₃^Z	1.77	0.56	0.33	0.24	1.38	1.56	0.20
M85		E_s₃^S	1.70	0.24	0.26	0.19	1.46	1.23	0.44
W77-10		Es₄-P	1.18	0.32	0.17	0.17	0.97	0.79	0.68
PS20		E_s₃^Z	6.53	6.13	1.16	0.55	2.20	3.33	0.14
PS18		E_s₃^Z	12.89	4.00	1.77	0.61	2.14	3.68	0.13
PS18-2		E_s₃^Z	18.79	6.88	4.40	0.84	2.85	4.06	0.08
H96-3		E_s₃^Z	9.39	1.70	1.95	0.58	2.46	3.42	0.22
C24-1		E_s₃^Z	2.93	0.41	0.44	0.32	1.23	1.18	0.40
M19-30		E_s₃^Z	3.07	0.37	0.72	0.43	1.70	1.78	0.38
W18-5	2 657.55	E_s₃^Z	1.79	0.31	0.89	0.49	13.09	10.33	1.79
W18-5	2 715.39	E_s₃^X	1.16	0.28	0.29	0.16	1.56	3.29	1.16
W18-5	2 904.01	E_s₃^X	1.09	0.19	0.18	0.11	1.17	2.42	1.09
W79-8	3 363.96	E_s₃^X	0.96	0.56	0.63	0.36	2.56	3.45	0.96
W79-8	3 456.16	E_s₃^X	7.35	1.76	-	4.23	-	-	7.35
WQ1	2 588.39	E_s₃^Z	0.39	0.02	0.56	0.30	3.21	5.13	0.39
W18-5	2 661.55	E_s₃^Z	1.75	0.20	0.36	0.22	2.25	2.91	1.75
W18-5	2 712.82	E_s₃^X	1.25	0.22	1.13	0.52	2.70	4.21	1.25
W18-5	2 933.49	E_s₃^X	2.36	0.35	1.68	0.73	3.25	6.96	2.36
W79-8	3 368.01	E_s₃^X	0.57	0.38	-	4.80	-	-	0.57
W79-8	3 467.50	E_s₃^X	1.57	0.68	2.39	1.57	2.14	2.98	1.57
W311	3 619.90	E_s₃^X	1.66	0.93	7.68	5.10	1.64	4.58	1.66
W452	3 923.54	E_s₃^X	2.47	2.19	5.30	3.32	3.02	5.86	2.47
PS20	4 440.27	E_s₃^X	2.24	1.63	18.40	9.82	3.20	7.81	2.24
PS20	4 555.28	E_s₃^X	2.29	2.66	39.24	9.60	4.94	10.20	2.29

Fig.7 Correlation of condensation parameters of N1 class species with calculated vitrinite reflectance (Rc) based on MPI1 index; Correlation of the relative abundance of the O2 class species versus the O1 and N1 class species in the crude oils and rock extracts analyzed

Fig.8 Ternary plot of the relative abundance of DBE = 9, 12 and 15 N1 species in the crude oils and source rock extracts, showing an obvious primary migration fractionation effect of the crude oils

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