准噶尔盆地东南缘二叠系芦草沟组烃源岩有机地球化学特征

doi:10.19657/j.geoscience.1000-8527.2022.220

摘要/Abstract

摘要：

准噶尔盆地东南缘烃源岩演化与油气成因复杂,采用岩石热解、色谱-质谱、碳同位素等有机地球化学分析技术,对该区二叠系芦草沟组烃源岩地球化学及其成烃演化特征进行了详细调查。结果表明,不同成熟度的二叠系芦草沟组烃源岩有机质丰度和有机类型差异显著,烃源岩有机碳、生油潜量(S₁+S₂)分布范围分别为0.43%~12.89%(均值2.84%)、0.52~77.24 mg/g,烃源岩质量可从低熟时的“极好”级别降低至高成熟时的“中等-差”级别(R_c≈0.54%~1.93%);有机质类型可从低熟时的Ⅰ-Ⅱ₁型变化为高成熟时的Ⅱ₂-Ⅲ,指示对高-过成熟烃源岩的有机质类型与生烃潜能评价需要进行评价参数的适当恢复。二叠系芦草沟组烃源岩生物标志物特征显著:姥鲛烷相对于植烷有微弱优势,Pr/Ph值分布范围为0.92~1.81(均值1.22),指示弱还原的湖相沉积环境;C₂₇-、C₂₈-、C₂₉-规则甾烷呈斜直线型分布;C₂₈-规则甾烷丰度偏高(C₂₈/C₂₉-规则甾烷均值为0.96)、升藿烷系列丰度偏低、伽马蜡烷发育,反映二叠系芦草沟组烃源岩咸化和/或水体分层的原始沉积环境。油-油、油-源对比表明,芦草沟组原油主要来自芦草沟组烃源岩。烃源岩地质地球化学分析表明,深浅层不同成熟度芦草沟组烃源岩均有发育,该区具有较好的生烃物质基础,具有寻找不同埋深油气藏的重要勘探前景。

关键词: 芦草沟组, 生烃潜力, 生物标志化合物, 准噶尔盆地

Abstract:

Thermal evolution and petroleum potential of the source rocks as well as origin of the hydrocarbons discovered in the southeast Junggar Basin are not clear enough. Geochemical methods including Rock-Eval, GC-MS and carbon isotopic analysis are used to unravel relevant issues. The results show that there are obvious differences in organic matter abundance and kerogen types of the source rocks form the Permian Lucaogou Formation (P₂l) with varying thermal maturity. The total organic carbon (TOC) of the P₂l source rocks is ranged in 0.43 %-12.89 % (averaged 2.84 %), and the petroleum potential of (S₁+S₂) is in the range of 0.52-77.24 mg/g. The source rock quality can be reduced from “excellent” grade at low maturity to “moderate-poor” grade at high maturity (R_c≈0.54%-1.93%). The type of organic matter varies from type Ⅰ-Ⅱ at low maturity to type Ⅱ₂-Ⅲ at high maturity, indicating that it is necessary to properly restores the original value of the kerogen type and hydrocarbon generation potential for the high to over-mature source rocks. Distinguished characteristics of the biomarkers of the P₂l source rocks were observed: a weak advantage of pristine over phytane was observed with the ratios of Pr/Ph ranging from 0.92 to 1.81 (averaged 1.22), indicating a weakly reduced lacustrine sedimentary environment; the relative abundance of C₂₇-,C₂₈-, and C₂₉-regular steranes showed an ascending linear pattern. The source rocks are also characterized by high relative abundance of C₂₈-regular steranes (with the mean value of the C₂₈/ C₂₉-regular steranes ratio to be 0.96), low relative abundance of homohopanes with gammacerane developed, while the abundance of hopanes is low and gammacerane is moderately developed in the source rocks,indicating saline and/or water stratified paleoenvironment of the P₂l source rocks when deposited. Oil-oil and oil-source rock correlations showed that the crude oils from the Lucaogou Formation were mainly derived from the P₂l source rocks. The geochemical and geological investigations of this study shows that the P₂l source rocks with a relatively wide range of burial depth and therefore a wide range of maturity level were well developed, suggesting an excellent hydrocarbons generation potential in the area investigated. It indicates great petroleum exploration prospects for deep and shallow horizons.

Key words: Lucaogou Formation, hydrocarbon generation potential, biomarker, Junggar Basin

中图分类号:

TE122.1

张韩静, 李素梅, 高永进, 张林, 柯昌炜. 准噶尔盆地东南缘二叠系芦草沟组烃源岩有机地球化学特征[J]. 现代地质, 2022, 36(06): 1538-1550.

ZHANG Hanjing, LI Sumei, GAO Yongjin, ZHANG Lin, KE Changwei. Organic Geochemical Characteristics of Source Rocks of Permian Lucaogou Formation in Southeastern of Junggar Basin[J]. Geoscience, 2022, 36(06): 1538-1550.

图/表 11

图1 准噶尔盆地东南缘区域地质图(a)和构造剖面(b)

Fig.1 Regional structural diagram and structural section of the southeastern Junggar Basin

表1 烃源岩热解和TOC参数统计表

Table 1 Statistical table of Rock-Eval and TOC for the source rocks analyzed

编号	井号	层位	岩性	深度/ m	TOC/ %	T_max /℃	(S₁+S₂)/ (mg/g)	PI	HI	烃指数/ (mg/g TOC)	降解率 /%	((S₁+S₂)/ TOC)/ (mg/gTOC)	氯仿“A” /%	烃源岩评价^*
1	BC1	P₂l	深灰色泥岩	54.68	12.89	455	77.24	0.01	593	1.463	49.73	5.99	0.195	极好-极好-好
2	BC1	P₂l	深灰色泥岩	166	-	-	-	-	-	-	-	-	-	-
3	BC1	P₂l	灰黑色泥岩	225.7	6.83	448	28.82	0.06	398	0.713	34.99	4.22	0.096	极好-极好-中
4	BC1	P₂l	灰黑色泥岩	308	-	-	-	-	-	-	-	-	-	-
5	BC1	P₂l	灰黑色泥岩	394.08	-	-	-	-	-	-	-	-	-	-
6	BC1	P₂l	灰黑色泥岩	506.11	3.76	451	12.3	0.07	302	0.182	27.11	3.27	0.061	极好-好-中
7	BC1	P₂l	灰黑色泥岩	623.53	-	-	-	-	-	-	-	-	-	-
8	BC1	P₂l	灰黑色泥岩	718.44	2.94	451	4.03	0.18	113	0.100	11.22	1.37	0.081	极好-极好-中
9	BC1	P₂l	灰黑色泥岩	868.56	2.12	443	5.04	0.21	189	0.120	19.85	2.38	0.332	极好-中-极好
10	BC1	P₂l	灰黑色泥岩	965.85	-	-	-	-	-	-	-	-	-	-
11	XJC1	P₃w	深灰色云质泥岩	2 912	0.43	453	0.27	0.26	47	0.002	4.69	0.63	0.013	差-差-非
12	XJC1	P₃w	深灰色泥岩	2 918	0.44	458	0.18	0.28	30	0.002	2.29	0.41	0.013	中-差-非
13	XJC1	P₂l₂	深灰色泥岩	3 814.7	0.90	467	0.52	0.25	44	0.003	4.47	0.58	0.021	中-非-差
14	XJC1	P₂l₂	深灰色泥岩	3 974.25	2.49	492	1.68	0.1	61	0.004	5.62	0.67	0.023	极好-非-差
15	XJC1	P₂l₂	深灰-灰黑色碳质泥岩	4 080	0.50	473	0.33	0.27	48	0.002	6.04	0.66	0.017	差-差-差
16	XJC1	P₂l₂	深灰色-灰黑色泥岩	4 146.5	0.94	478	0.84	0.42	52	0.008	7.42	0.89	0.021	中-非-差
17	XJC1	P₂l₂	灰黑色泥岩	4 174.4	-	-	-	-	-	-	-	-	-	-
18	XJC1	P₂l₂	深灰色泥岩	4 198.7	0.90	467	1.05	0.5	58	0.013	10.05	1.17	0.038	中-非-差
19	XJC1	P₂l₂	深灰色泥岩	4 205	-	-	-	-	-	-	-	-	-	-
20	XJC1	P₂l₂	深灰色泥岩	4 235.2	0.79	481	0.79	0.41	60	0.008	8.86	1.00	0.022	中-非-非
21	XJC1	P₂l₁	灰黑色泥岩	4 574.8	4.55	464	3.91	0.09	78	0.008	7.03	0.86	0.081	极好-中-中
22	XJC1	P₂l₁	灰黑色泥岩	4 576.8	2.82	467	2.1	0.09	68	0.004	6.03	0.74	0.022	极好-中-差
23	XJC1	P₂l₁	深灰色泥岩	4 672	1.51	477	0.58	0.28	28	0.003	3.32	0.39	0.026	好-非-差
24	XJC1	P₂l₁	深灰-灰黑色泥岩	4 677	3.61	478	0.78	0.22	17	0.004	1.66	0.22	0.016	极好-非-差

表1 烃源岩热解和TOC参数统计表

Table 1 Statistical table of Rock-Eval and TOC for the source rocks analyzed

编号	井号	层位	岩性	深度/ m	TOC/ %	T_max /℃	(S₁+S₂)/ (mg/g)	PI	HI	烃指数/ (mg/g TOC)	降解率 /%	((S₁+S₂)/ TOC)/ (mg/gTOC)	氯仿“A” /%	烃源岩评价^*
1	BC1	P₂l	深灰色泥岩	54.68	12.89	455	77.24	0.01	593	1.463	49.73	5.99	0.195	极好-极好-好
2	BC1	P₂l	深灰色泥岩	166	-	-	-	-	-	-	-	-	-	-
3	BC1	P₂l	灰黑色泥岩	225.7	6.83	448	28.82	0.06	398	0.713	34.99	4.22	0.096	极好-极好-中
4	BC1	P₂l	灰黑色泥岩	308	-	-	-	-	-	-	-	-	-	-
5	BC1	P₂l	灰黑色泥岩	394.08	-	-	-	-	-	-	-	-	-	-
6	BC1	P₂l	灰黑色泥岩	506.11	3.76	451	12.3	0.07	302	0.182	27.11	3.27	0.061	极好-好-中
7	BC1	P₂l	灰黑色泥岩	623.53	-	-	-	-	-	-	-	-	-	-
8	BC1	P₂l	灰黑色泥岩	718.44	2.94	451	4.03	0.18	113	0.100	11.22	1.37	0.081	极好-极好-中
9	BC1	P₂l	灰黑色泥岩	868.56	2.12	443	5.04	0.21	189	0.120	19.85	2.38	0.332	极好-中-极好
10	BC1	P₂l	灰黑色泥岩	965.85	-	-	-	-	-	-	-	-	-	-
11	XJC1	P₃w	深灰色云质泥岩	2 912	0.43	453	0.27	0.26	47	0.002	4.69	0.63	0.013	差-差-非
12	XJC1	P₃w	深灰色泥岩	2 918	0.44	458	0.18	0.28	30	0.002	2.29	0.41	0.013	中-差-非
13	XJC1	P₂l₂	深灰色泥岩	3 814.7	0.90	467	0.52	0.25	44	0.003	4.47	0.58	0.021	中-非-差
14	XJC1	P₂l₂	深灰色泥岩	3 974.25	2.49	492	1.68	0.1	61	0.004	5.62	0.67	0.023	极好-非-差
15	XJC1	P₂l₂	深灰-灰黑色碳质泥岩	4 080	0.50	473	0.33	0.27	48	0.002	6.04	0.66	0.017	差-差-差
16	XJC1	P₂l₂	深灰色-灰黑色泥岩	4 146.5	0.94	478	0.84	0.42	52	0.008	7.42	0.89	0.021	中-非-差
17	XJC1	P₂l₂	灰黑色泥岩	4 174.4	-	-	-	-	-	-	-	-	-	-
18	XJC1	P₂l₂	深灰色泥岩	4 198.7	0.90	467	1.05	0.5	58	0.013	10.05	1.17	0.038	中-非-差
19	XJC1	P₂l₂	深灰色泥岩	4 205	-	-	-	-	-	-	-	-	-	-
20	XJC1	P₂l₂	深灰色泥岩	4 235.2	0.79	481	0.79	0.41	60	0.008	8.86	1.00	0.022	中-非-非
21	XJC1	P₂l₁	灰黑色泥岩	4 574.8	4.55	464	3.91	0.09	78	0.008	7.03	0.86	0.081	极好-中-中
22	XJC1	P₂l₁	灰黑色泥岩	4 576.8	2.82	467	2.1	0.09	68	0.004	6.03	0.74	0.022	极好-中-差
23	XJC1	P₂l₁	深灰色泥岩	4 672	1.51	477	0.58	0.28	28	0.003	3.32	0.39	0.026	好-非-差
24	XJC1	P₂l₁	深灰-灰黑色泥岩	4 677	3.61	478	0.78	0.22	17	0.004	1.66	0.22	0.016	极好-非-差

图2 准噶尔盆地东南缘二叠系芦草沟组(P2l)部分烃源岩基本地球化学参数分布特征 P2l.二叠系芦草沟组烃源岩;P3w.二叠系梧桐沟组烃源岩;P2l2.二叠系芦草沟组二段烃源岩;P2l1.二叠系芦草沟组一段烃源岩;Ro.镜质体反射率;Rc=0.55×MPI1+ 0.44,MPI1=1.5×(2-甲基菲+3-甲基菲)/(菲+1-甲基菲+9-甲基菲)

Fig.2 Distribution characteristics of basic geochemical parameters of partial source rocks of the Permian Lucaogou Formation in the southeastern Junggar Basin

图3 准噶尔盆地东南缘烃源岩有机质丰度和成熟度分布特征((a)依据石油工业部标准(SY/T5735-1995),(b)依据Radke等[15])

Fig.3 Organic matter abundance and maturity of the source rocks in the southeastern Junggar Basin

图4 Tmax-降解率(a)、Tmax-氢指数关系图(b)

Fig.4 Tmax-degradation rate (a), Tmax-hydrogen index diagram (b)

图5 烃源岩、原油饱和烃总离子流图

Fig.5 Total ion chromatograms (TIC) of saturated fractions from selected source rocks and crude oils

表2 准噶尔盆地东南缘XJC1井和CB1井烃源岩生物标志化合物参数统计表

Table 2 Biomarker parameters of the source rocks from XJC1 and BC1 wells in the southeastern Junggar Basin

编号	井号	井深 /m	层位	$C 21 -$ / $C 22 +$	Pr/Ph	CPI	OEP	αββ	C₂₉ 20S	G/ C₃₀H	C₂₈/ C₂₉	Tri/ Pent	C₂₇/ %	C₂₈/ %	C₂₉/ %	DBT/P	F₁	F₂	R_c
1	XJC1	2 912	P₃w	0.26	0.68	1.3	1.1	0.39	0.51	0.76	0.77	0.44	29.9	27.8	42.3	0.14	0.45	0.24	0.79
2	XJC1	2 918	P₃w	0.24	0.61	1.2	1.0	0.44	0.51	0.49	0.58	0.32	27.1	25.4	47.5	0.12	0.46	0.25	0.84
3	XJC1	3 814	P₂l₂	1.05	1.81	1.0	1.0	0.58	0.47	0.47	0.59	0.67	40.6	20.4	39.0	0.03	0.63	0.36	1.16
4	XJC1	3 974	P₂l₂	1.05	0.92	1.1	1.0	0.53	0.51	0.20	0.62	0.78	34.5	22.3	43.2	0.08	0.71	0.41	1.12
5	XJC1	4 080	P₂l₂	1.15	1.36	0.9	1.1	0.39	0.56	0.23	0.57	1.18	44.2	27.7	28.1	0.04	0.73	0.43	1.42
6	XJC1	4 145	P₂l₂	1.10	1.30	1.1	1.1	0.57	0.57	0.14	1.38	1.47	43.2	33.3	23.4	0.01	0.73	0.46	1.51
7	XJC1	4 174	P₂l₂	0.83	1.13	1.2	1.0	0.55	0.53	0.14	1.19	1.15	62.7	19.7	17.6	0.02	0.76	0.45	1.82
8	XJC1	4 198	P₂l₂	0.99	1.25	1.3	1.1	0.57	0.47	0.16	1.01	1.43	47.0	27.8	25.2	0.01	0.76	0.47	1.93
9	XJC1	4 205	P₂l₂	0.84	1.23	1.2	1.1	0.45	0.45	0.23	2.09	1.00	52.6	32.4	15.0	0.02	0.74	0.44	1.80
10	XJC1	4 235	P₂l₂	0.95	1.35	1.1	1.0	0.40	0.60	0.19	0.31	2.24	40.4	23.3	36.3	0.01	0.78	0.47	1.73
11	XJC1	4 547	P₂l₁	1.83	1.27	1.1	1.0	0.56	0.51	0.20	1.11	11.6	19.0	40.0	40.9	0.01	0.60	0.33	1.79
12	XJC1	4 576	P₂l₁	1.14	1.24	1.1	1.0	0.54	0.50	0.18	0.97	4.51	25.6	35.2	39.3	0.01	0.64	0.36	1.74
13	XJC1	4 672	P₂l₁	0.88	1.24	0.9	1.0	0.55	0.49	0.24	0.88	2.17	20.9	35.9	43.2	0.01	0.78	0.48	1.29
14	XJC1	4 677	P₂l₁	0.89	1.10	1.1	1.0	0.58	0.50	0.19	0.92	4.60	24.1	37.1	38.8	0.01	0.79	0.48	1.23
15	BC1	54	P₂l	-	-	-	-	0.55	0.52	0.16	1.05	0.74	16.3	42.6	41.1	0.03	0.19	0.10	0.57
16	BC1	166	P₂l	1.26	1.18	-	-	0.54	0.54	0.19	0.91	0.51	16.8	40.2	43.0	0.04	0.31	0.14	0.61
17	BC1	225	P₂l	0.95	1.18	1.1	-	0.47	0.57	0.18	0.77	0.32	19.4	36.0	44.6	0.05	0.25	0.14	0.54
18	BC1	308	P₂l	0.56	1.07	1.0	1.2	0.51	0.56	0.16	0.98	0.57	19.4	40.2	40.4	0.04	0.31	0.15	0.59
19	BC1	394	P₂l	0.72	1.01	1.1	1.1	0.47	0.56	0.15	1.02	0.36	17.2	41.0	41.8	0.04	0.36	0.18	0.65
20	BC1	506	P₂l	0.29	0.96	1.0	1.0	0.47	0.56	0.18	0.85	0.31	16.4	37.7	45.8	0.03	0.40	0.20	0.68
21	BC1	623	P₂l	0.76	1.09	1.1	0.9	0.53	0.52	0.17	1.20	0.81	12.3	44.6	43.1	0.03	0.46	0.22	0.82
22	BC1	714	P₂l	1.84	1.17	-	0.9	0.51	0.54	0.40	0.76	0.31	7.1	37.5	55.5	0.03	0.53	0.30	0.93
23	BC1	965	P₂l	0.86	1.65	0.9	-	0.53	0.52	0.29	0.91	0.54	9.0	41.4	49.6	0.04	0.43	0.23	0.82
24	BC1	966	P₂l	1.25	1.16	0.9	-	0.53	0.52	0.24	0.92	0.51	8.8	42.0	49.3	0.02	0.44	0.24	0.89
25	XJC1	4 154	Oil	-	1.62	-	-	0.56	0.49	0.23	1.07	1.41	14.5	40.9	44.6	0.03	0.77	0.42	1.68
26	XJC1	4 171	Oil	-	1.59	-	-	0.55	0.49	0.22	1.10	1.29	14.7	40.0	45.3	0.03	0.77	0.42	1.70
27	XJC1	4 195	Oil	-	1.55	-	-	0.56	0.49	0.19	0.98	1.26	13.2	39.3	47.5	0.02	0.77	0.42	1.73
28	XJC1	4 230	Oil	-	1.53	-	-	0.55	0.48	0.20	1.11	1.26	13.6	40.4	46.0	0.01	0.77	0.43	1.72
29	BC1	181	Oil	-	-	-	-	0.46	0.55	0.80	0.79	0.47	22.1	30.1	47.8	0.00	0.60	0.32	1.01
30	BC1	206	Oil	-	-	-	-	0.40	0.51	1.56	0.90	0.33	15.0	36.3	48.6	0.06	0.59	0.33	0.71
31	BC1	405	Oil	-	-	-	-	0.41	0.52	0.45	0.93	0.32	15.3	37.7	47.0	0.07	0.44	0.24	0.75

表2 准噶尔盆地东南缘XJC1井和CB1井烃源岩生物标志化合物参数统计表

Table 2 Biomarker parameters of the source rocks from XJC1 and BC1 wells in the southeastern Junggar Basin

编号	井号	井深 /m	层位	$C 21 -$ / $C 22 +$	Pr/Ph	CPI	OEP	αββ	C₂₉ 20S	G/ C₃₀H	C₂₈/ C₂₉	Tri/ Pent	C₂₇/ %	C₂₈/ %	C₂₉/ %	DBT/P	F₁	F₂	R_c
1	XJC1	2 912	P₃w	0.26	0.68	1.3	1.1	0.39	0.51	0.76	0.77	0.44	29.9	27.8	42.3	0.14	0.45	0.24	0.79
2	XJC1	2 918	P₃w	0.24	0.61	1.2	1.0	0.44	0.51	0.49	0.58	0.32	27.1	25.4	47.5	0.12	0.46	0.25	0.84
3	XJC1	3 814	P₂l₂	1.05	1.81	1.0	1.0	0.58	0.47	0.47	0.59	0.67	40.6	20.4	39.0	0.03	0.63	0.36	1.16
4	XJC1	3 974	P₂l₂	1.05	0.92	1.1	1.0	0.53	0.51	0.20	0.62	0.78	34.5	22.3	43.2	0.08	0.71	0.41	1.12
5	XJC1	4 080	P₂l₂	1.15	1.36	0.9	1.1	0.39	0.56	0.23	0.57	1.18	44.2	27.7	28.1	0.04	0.73	0.43	1.42
6	XJC1	4 145	P₂l₂	1.10	1.30	1.1	1.1	0.57	0.57	0.14	1.38	1.47	43.2	33.3	23.4	0.01	0.73	0.46	1.51
7	XJC1	4 174	P₂l₂	0.83	1.13	1.2	1.0	0.55	0.53	0.14	1.19	1.15	62.7	19.7	17.6	0.02	0.76	0.45	1.82
8	XJC1	4 198	P₂l₂	0.99	1.25	1.3	1.1	0.57	0.47	0.16	1.01	1.43	47.0	27.8	25.2	0.01	0.76	0.47	1.93
9	XJC1	4 205	P₂l₂	0.84	1.23	1.2	1.1	0.45	0.45	0.23	2.09	1.00	52.6	32.4	15.0	0.02	0.74	0.44	1.80
10	XJC1	4 235	P₂l₂	0.95	1.35	1.1	1.0	0.40	0.60	0.19	0.31	2.24	40.4	23.3	36.3	0.01	0.78	0.47	1.73
11	XJC1	4 547	P₂l₁	1.83	1.27	1.1	1.0	0.56	0.51	0.20	1.11	11.6	19.0	40.0	40.9	0.01	0.60	0.33	1.79
12	XJC1	4 576	P₂l₁	1.14	1.24	1.1	1.0	0.54	0.50	0.18	0.97	4.51	25.6	35.2	39.3	0.01	0.64	0.36	1.74
13	XJC1	4 672	P₂l₁	0.88	1.24	0.9	1.0	0.55	0.49	0.24	0.88	2.17	20.9	35.9	43.2	0.01	0.78	0.48	1.29
14	XJC1	4 677	P₂l₁	0.89	1.10	1.1	1.0	0.58	0.50	0.19	0.92	4.60	24.1	37.1	38.8	0.01	0.79	0.48	1.23
15	BC1	54	P₂l	-	-	-	-	0.55	0.52	0.16	1.05	0.74	16.3	42.6	41.1	0.03	0.19	0.10	0.57
16	BC1	166	P₂l	1.26	1.18	-	-	0.54	0.54	0.19	0.91	0.51	16.8	40.2	43.0	0.04	0.31	0.14	0.61
17	BC1	225	P₂l	0.95	1.18	1.1	-	0.47	0.57	0.18	0.77	0.32	19.4	36.0	44.6	0.05	0.25	0.14	0.54
18	BC1	308	P₂l	0.56	1.07	1.0	1.2	0.51	0.56	0.16	0.98	0.57	19.4	40.2	40.4	0.04	0.31	0.15	0.59
19	BC1	394	P₂l	0.72	1.01	1.1	1.1	0.47	0.56	0.15	1.02	0.36	17.2	41.0	41.8	0.04	0.36	0.18	0.65
20	BC1	506	P₂l	0.29	0.96	1.0	1.0	0.47	0.56	0.18	0.85	0.31	16.4	37.7	45.8	0.03	0.40	0.20	0.68
21	BC1	623	P₂l	0.76	1.09	1.1	0.9	0.53	0.52	0.17	1.20	0.81	12.3	44.6	43.1	0.03	0.46	0.22	0.82
22	BC1	714	P₂l	1.84	1.17	-	0.9	0.51	0.54	0.40	0.76	0.31	7.1	37.5	55.5	0.03	0.53	0.30	0.93
23	BC1	965	P₂l	0.86	1.65	0.9	-	0.53	0.52	0.29	0.91	0.54	9.0	41.4	49.6	0.04	0.43	0.23	0.82
24	BC1	966	P₂l	1.25	1.16	0.9	-	0.53	0.52	0.24	0.92	0.51	8.8	42.0	49.3	0.02	0.44	0.24	0.89
25	XJC1	4 154	Oil	-	1.62	-	-	0.56	0.49	0.23	1.07	1.41	14.5	40.9	44.6	0.03	0.77	0.42	1.68
26	XJC1	4 171	Oil	-	1.59	-	-	0.55	0.49	0.22	1.10	1.29	14.7	40.0	45.3	0.03	0.77	0.42	1.70
27	XJC1	4 195	Oil	-	1.55	-	-	0.56	0.49	0.19	0.98	1.26	13.2	39.3	47.5	0.02	0.77	0.42	1.73
28	XJC1	4 230	Oil	-	1.53	-	-	0.55	0.48	0.20	1.11	1.26	13.6	40.4	46.0	0.01	0.77	0.43	1.72
29	BC1	181	Oil	-	-	-	-	0.46	0.55	0.80	0.79	0.47	22.1	30.1	47.8	0.00	0.60	0.32	1.01
30	BC1	206	Oil	-	-	-	-	0.40	0.51	1.56	0.90	0.33	15.0	36.3	48.6	0.06	0.59	0.33	0.71
31	BC1	405	Oil	-	-	-	-	0.41	0.52	0.45	0.93	0.32	15.3	37.7	47.0	0.07	0.44	0.24	0.75

图6 烃源岩、原油饱和烃m/z=217质量色谱图

Fig.6 Partial m/z=217 mass chromatograms of saturated hydrocarbon fractions from selected source rocks and crude oils

图7 烃源岩、原油饱和烃m/z=191质量色谱图

Fig.7 Partial m/z=191 mass chromatograms of saturated hydrocarbon fractions from selected source rocks and crude oils

图8 烃源岩、原油生物标志物参数与深度关系图

Fig.8 Relationship between biomarker parameters and burial depth for the samples analyzed

图9 准噶尔盆地东南缘二叠系芦草沟组油-岩对比图

Fig.9 Oil-source correlation for the crude oils and source rocks from the Permian Lucaogou formation in the southeastern Junggar Basin

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