Geofluids

Research Article

Biomarkers and C and S Isotopes of the Permian to Triassic Solid Bitumen and Its Potential Source Rocks in NE Sichuan Basin

Table 3

Biomarker parameters of potential source rocks from the NE Sichuan Basin.


Sample number	Strata	EOM ppm	EOM/TOC (%)	Pr/Ph	Pr/nC₁₇	Ph/nC₁₈	Gm/C₃₀H	C₂₇ 20R%	C₂₈ 20R%	C₂₉ 20R%	C₂₄Te/C₂₆TT	C₂₃TT/C₃₀H	C₂₁TT/C₂₃TT

TJ7-153	Є₁	86	0.37	0.72	0.85	0.68	0.22	35.49	30.05	34.46	0.52	0.23	0.68	0.54	0.53	0.73	0.49	0.66	0.27
TJ7-58	Є₁	19	0.08	1.03	0.77	0.79	0.22	32.96	30.87	36.17	0.69	0.67	0.95	0.52	0.50	0.84	0.50	0.49	0.26
ZB-19	Є₁	56	0.11	0.96	0.63	0.7	0.19	32.39	23.58	44.03	2.14	0.10	0.90	0.50	1.11	1.01	0.30	0.30	0.11
HYS-3		46	0.17	0.75	0.59	0.90	0.21	32.72	30.94	36.34	0.63	0.85	1.65	0.51	0.50	0.00	0.52	0.46	0.26
HYS-6	S₁	23	0.03	0.63	0.79	0.89	0.19	37.10	28.00	34.89	0.57	0.27	0.63	0.52	0.54	0.69	0.50	0.66	0.27
HYS-8	S₁	91	0.46	0.79	0.87	0.85	0.18	36.93	29.48	33.59	0.57	0.28	0.71	0.52	0.54	0.69	0.49	0.75	0.26
HYS-11	S₁	76	0.56	0.90	0.86	0.94	0.20	36.72	29.22	34.06	0.54	0.26	0.67	0.54	0.54	0.63	0.49	0.71	0.29
TJ7-104	S₁	84	—	0.80	0.83	0.90	0.18	36.04	29.98	33.97	0.57	0.28	0.69	0.53	0.55	0.63	0.48	0.81	0.26
ZB-21	S₁	214	0.36	1.03	0.91	0.88	0.12	33.93	25.56	40.50	0.52	0.27	0.93	0.56	0.76	0.86	0.43	0.39	0.22
10-IV-4	P₃l	517	1.66	0.53	0.60	0.80	0.35	30.36	29.08	40.57	0.38	0.18	0.94	0.55	0.52	1.04	0.52	0.33	0.30
10-IV-30	P₃l	127	0.65	0.55	0.70	0.92	0.27	35.49	28.26	36.24	0.50	0.21	0.76	0.53	0.52	0.77	0.51	0.48	0.30
10-IV-40	P₃l	139	0.57.	0.67	0.68	0.91	0.29	33.60	31.17	35.23	0.47	0.21	0.72	0.52	0.55	0.85	0.51	0.56	0.27
10- IV-56	P₃l	71	0.16	0.59	0.48	0.66	0.20	34.14	27.20	38.66	0.53	0.25	0.62	0.52	0.53	0.49	0.49	0.63	0.28
10- IV-16	P₃l	73	0.58	0.92	0.60	0.53	0.26	36.58	29.04	34.39	0.57	0.31	0.63	0.53	0.55	0.48	0.48	0.85	0.27
HYS-7-161	P₃l	622	1.67	0.70	0.57	0.66	0.20	31.45	28.85	38.37	0.62	0.55	1.64	0.51	0.49	0.49	0.49	0.53	0.25
ZB-09-01	P₃w	106	0.87	0.80	0.72	0.60	0.30	29.42	28.41	42.17	0.54	0.12	1.09	0.49	0.42	0.84	0.45	0.60	0.22
ZB14-1	P₃d	181	0.25	0.93	0.75	0.76	0.17	32.78	28.85	38.37	0.62	0.75	1.18	0.47	0.53	0.48	0.48	0.56	0.29
ZB17-3	P₃d	394	1.09	1.17	0.53	0.53	0.18	37.91	29.68	32.41	0.34	1.14	1.04	0.49	0.49	0.49	0.49	0.70	0.22
LD7	P₃d	68	0.14	0.68	0.99	1.01	0.19	34.96	31.78	34.26	0.54	0.28	0.65	0.58	0.53	0.67	0.45	0.81	0.27
CJ43	P₃d	—	—	0.87	0.91	0.71	0.37	28.09	29.87	42.02	0.41	0.18	0.87	0.51	0.53	0.71	0.53	0.35	0.29
GZ17	P₃d	—	—	0.59	0.66	0.73	0.15	40.70	30.37	28.93	0.53	0.25	0.79	0.50	0.50	0.57	0.50	0.80	0.25
GZ18-1	P₃d	—	—	0.61	0.60	0.75	0.12	41.29	29.62	29.09	0.54	0.26	0.75	0.51	0.53	0.59	0.51	0.80	0.25

Note. Pr/Ph was from GC-MS trace; Є₁, , S₁, P₃l, P₃d, P₃ch, and T₁f represent Lower Cambrian, Upper Ordovician Wufeng Fm, Lower Silurian, Upper Permian Longtan Fm, Upper Permian Dalong Fm, Upper Permian Changxing Fm, and Lower Triassic Feixianguan Fm, respectively. TT: tricyclic terpane; H: 17α, 21β-hopane; St: regular sterane; Ts: 18α, 21β-22, 29, 30-trisnorhopane; Tm: 17α, 21β-22, 29, 30-trisnorhopane; 29Ts: C₂₉ 18α, 21β 30-norhopane; Gm: gammacerane; M: moretane.