Genetic Mechanism of Low-Maturity Oil in the Qingyuan Tectonic Belt, Baoding Sag, Jizhong Depression

doi:10.19657/j.geoscience.1000-8527.2024.106

Abstract

Abstract:

A significant amount of hydrocarbons has been discovered in recent years in the Qingyuan Tectonic Belt of the Baoding Sag, within the Jizhong Depression of the Bohai Bay Basin. However, the origin and primary source rock of the discovered oils remain under debate. Conventional geochemical methods, combined with negative ESI FT-ICR MS, were employed to investigate the origin and formation mechanism of the crude oils. The majority of the crude oils collected from the Qingyuan Tectonic Belt can be classified as heavy oil, characterized by low wax (average 8.12%), low sulfur (average 0.81%), low Pr/Ph (0.14-0.24), high sterane/hopane ratio (3.3-5.6), high relative abundance of gammacerane and triaromatic sterane (40%-61%), and low sterane isomerization (C₂₉ sterane ααα20S/(S+R)=0.23-0.28). These characteristics suggest a strongly reducing, brackish-saline, and/or water-stratified paleoenvironment during the deposition of the source rocks. Oil-oil and oil-source correlations reveal similar geochemical characteristics between the crude oils in the Lixian Slope of the Raoyang Sag and those in the main body of the Qiyuan Tectonic Belt. The crude oils show a close genetic affinity with the source rocks from the first member of the Shahejie Formation (Es₁) in the Lixian Slope. It is suggested that the main source rocks of the crude oils had a burial depth of at least 3,000 m. No correlation was observed between the crude oils and the source rocks in the adjacent Baoding Sag, due to their relatively low hydrocarbon generation potential and thermal evolution. The crude oils were enriched in O₁ and O₂ species, particularly those with equivalent double bond equivalent (DBE) of 1 and 5 (mainly fatty acids and steric acids, respectively), which could decarboxylate into hydrocarbons at low temperatures. We suggested that both the relatively low thermal evolution (in the early stage of oil generation window) and the enrichment of algal lipids in the Es₁ source rocks are responsible for the less mature oils in the Qingyuan Tectonic Belts.

Key words: Baoding Sag, Qinyuan Tectonic Belt, less mature oil, biomarker, high resolution mass spectrometry, hydrocarbon generation mechanism

CLC Number:

LI Xiaodong, LI Zhijun, LI Xiwei, MA Xuefeng, LI Xiaoyan, CHEN Ketong, ZHANG Jichao, XU Mengting, ZHANG Ruixue, QIN Menghua, WANG Chengyun, LIU Jia, ZHANG Jianmiao, SHI Qianqian, LI Sumei. Genetic Mechanism of Low-Maturity Oil in the Qingyuan Tectonic Belt, Baoding Sag, Jizhong Depression[J]. Geoscience, 2024, 38(05): 1338-1353.

Figures/Tables 14

Fig.1 Illustration of the regional structure skeleton (a) and hydrocarbon distribution (b) of the Baoding-Raoyang Sag in the Jizhong Depression

Table 1 Physical properties of crude oils from the Qingyuan Tectonic Belt

数值类型	密度(g/cm³)(20 ℃)	黏度(mPa·s)	凝固点(℃)	含蜡(%)	含硫(%)
分布范围	0.9079~0.9472	421~6397	18~36	4.86~12.83	0.55~1.11
均值(个数)	0.9805(22)	1965(22)	27(22)	8.12(22)	0.81(22)

Table 2 Basic geochemical parameters of Tertiary crude oils from the Baoding-Raoyang Sag

凹陷	构造单元	编号	井号	深度(m)	层位	Sat (%)		Ar (%)		Re (%)		Asp (%)		CPI		OEP		Pr/ nC₁₇
保定	清苑构造北侧	1	GB1X	2194.0~2198.0	Es₁	44.90		17.60		24.20		13.30		1.16		1.08		0.56
		2	G66	2622.2~2626.2	Es₁	60.40		17.00		20.00		2.60		1.15		1.07		0.60
		3	D20X	3071.0~3079.0	Es₁	55.10		16.80		21.40		6.70		1.17		1.08		0.68
	清苑构造主体带	4	G77-2X	1385.4~1395.8	Ed	22.90		25.80		49.00		2.40		3.62		6.11		2.04
		5	G77-1X	1737.0~1778.8	E $s 1 上$	27.71		19.18		9.54		43.56		1.02		0.90		1.91
		6	G77-10X	1701.0~1778.0	E $s 1 上$	23.58		16.87		10.32		49.24		1.05		0.91		2.63
		7	G77-11X	1320.8~1352.0	Ed₃	17.55		20.86		13.77		47.83		1.16		1.00		4.24
		8	G77X	1594.0~1600.4	Ed₃	20.78		24.36		23.87		30.99		1.23		1.71		4.94
		9	G79X	1568.0~1585.0	Ed₃	25.19		19.65		11.63		43.53		0.98		0.99		2.23
		10	BQ2	2086.4~2121.0	Ed₃	18.36		14.09		11.31		56.25		1.03		1.90		1.23
		11	BQ1X	1035.8~1054.4	Ed	41.50		23.30		31.30		4.44		1.07		0.90		3.06
饶阳	蠡县斜坡	12	N721X	3429.4~3457.0	E $s 1 下$	57.30		19.60		16.20		6.90		1.00		0.92		0.92
		13	G684	2423.0~2430.0	E $s 1 上$	12.20		32.30		54.00		1.50		1.03		0.99		1.52
		14	XL1	3266.0~3330.0	E $s 1 下$	41.30		16.20		41.30		1.20		1.08		1.01		1.47
		15	XL25X	3328.2~3342.1	E $s 1 下$	69.90		12.50		17.30		0.30		1.02		0.92		1.07
		16	G67X	1571.0~1574.1	Ng	57.30		14.90		24.40		3.30		1.02		0.92		1.06
	洼陷带	17	WA102X	3162.6~3165.9	E $s 3 上$	57.30		19.10		22.10		1.50		1.15		1.01		0.80
		18	M25-18X	3382.2~3402.9	Es₃	67.20		16.40		14.40		2.00		1.15		1.07		0.48
		19	Q104X	3935.1~3946.4	E $s 3 下$	63.50		14.60		19.60		2.20		1.15		1.08		0.43
		20	Q105X	2720.0~2773.8	E $s 3 下$	66.40		15.50		14.40		3.60		1.21		1.11		0.63
凹陷	构造单元	编号	井号	井深(m)	层位	Ph/ nC₁₈	Pr/ Ph		C₂₉S/R		abb		S/H		G/ C₃₁H	C₃₁ S/R	C₂₉Ts/ C₃₀H
保定	清苑构造北侧	1	GB1X	2194.0~2198.0	Es₁	0.88	0.67		0.29		0.25		0.76		0.34	0.57	0.26
		2	G66	2622.2~2626.2	Es₁	1.01	0.63		0.26		0.24		0.93		0.42	0.57	0.25
		3	D20X	3071.0~3079.0	Es₁	1.71	0.43		0.25		0.21		1.12		0.52	0.57	0.25
	清苑构造主体带	4	G77-2X	1385.4~1395.8	Ed	102.37	0.15		0.24		0.20		4.28		1.59	0.52	0.06
		5	G77-1X	1737.0~1778.8	E $s 1 上$	13.70	0.17		0.27		0.20		4.48		0.98	0.51	0.04
		6	G77-10X	1701.0~1778.0	E $s 1 上$	21.34	0.16		0.25		0.20		4.64		1.02	0.50	0.04
		7	G77-11X	1320.8~1352.0	Ed₃	67.82	0.14		0.23		0.20		5.62		1.38	0.48	0.03
		8	G77X	1594.0~1600.4	Ed₃	71.55	0.16		0.26		0.20		4.27		0.97	0.51	0.04
		9	G79X	1568.0~1585.0	Ed₃	13.26	0.19		0.28		0.21		3.66		0.85	0.52	0.05
		10	BQ2	2086.4~2121.0	Ed₃	18.00	0.15		0.25		0.19		4.24		0.95	0.50	0.04
		11	BQ1X	1035.8~1054.4	Ed	14.90	0.24		0.28		0.21		3.30		1.04	0.56	0.07
饶阳	蠡县斜坡	12	N721X	3429.4~3457.0	E $s 1 下$	2.64	0.35		0.45		0.30		1.72		0.65	0.59	0.10
		13	G684	2423.0~2430.0	E $s 1 上$	8.54	0.20		0.24		0.20		3.46		1.25	0.54	0.07
		14	XL1	3266.0~3330.0	E $s 1 下$	7.20	0.23		0.22		0.20		3.59		1.39	0.51	0.07
		15	XL25X	3328.2~3342.1	E $s 1 下$	3.59	0.31		0.34		0.24		2.31		0.78	0.57	0.09
		16	G67X	1571.0~1574.1	Ng	3.87	0.30		0.38		0.25		2.31		0.78	0.58	0.10
	洼陷带	17	WA102X	3162.6~3165.9	E $s 3 上$	2.29	0.45		0.28		0.22		1.88		0.79	0.56	0.14
		18	M25-18X	3382.2~3402.9	Es₃	0.37	1.32		0.39		0.29		0.25		0.17	0.58	0.32
		19	Q104X	3935.1~3946.4	E $s 3 下$	0.25	1.91		0.47		0.47		0.20		0.08	0.57	0.20
		20	Q105X	2720.0~2773.8	E $s 3 下$	0.35	2.06		0.40		0.39		0.24		0.11	0.58	0.22

Table 2 Basic geochemical parameters of Tertiary crude oils from the Baoding-Raoyang Sag

凹陷	构造单元	编号	井号	深度(m)	层位	Sat (%)		Ar (%)		Re (%)		Asp (%)		CPI		OEP		Pr/ nC₁₇
保定	清苑构造北侧	1	GB1X	2194.0~2198.0	Es₁	44.90		17.60		24.20		13.30		1.16		1.08		0.56
		2	G66	2622.2~2626.2	Es₁	60.40		17.00		20.00		2.60		1.15		1.07		0.60
		3	D20X	3071.0~3079.0	Es₁	55.10		16.80		21.40		6.70		1.17		1.08		0.68
	清苑构造主体带	4	G77-2X	1385.4~1395.8	Ed	22.90		25.80		49.00		2.40		3.62		6.11		2.04
		5	G77-1X	1737.0~1778.8	E $s 1 上$	27.71		19.18		9.54		43.56		1.02		0.90		1.91
		6	G77-10X	1701.0~1778.0	E $s 1 上$	23.58		16.87		10.32		49.24		1.05		0.91		2.63
		7	G77-11X	1320.8~1352.0	Ed₃	17.55		20.86		13.77		47.83		1.16		1.00		4.24
		8	G77X	1594.0~1600.4	Ed₃	20.78		24.36		23.87		30.99		1.23		1.71		4.94
		9	G79X	1568.0~1585.0	Ed₃	25.19		19.65		11.63		43.53		0.98		0.99		2.23
		10	BQ2	2086.4~2121.0	Ed₃	18.36		14.09		11.31		56.25		1.03		1.90		1.23
		11	BQ1X	1035.8~1054.4	Ed	41.50		23.30		31.30		4.44		1.07		0.90		3.06
饶阳	蠡县斜坡	12	N721X	3429.4~3457.0	E $s 1 下$	57.30		19.60		16.20		6.90		1.00		0.92		0.92
		13	G684	2423.0~2430.0	E $s 1 上$	12.20		32.30		54.00		1.50		1.03		0.99		1.52
		14	XL1	3266.0~3330.0	E $s 1 下$	41.30		16.20		41.30		1.20		1.08		1.01		1.47
		15	XL25X	3328.2~3342.1	E $s 1 下$	69.90		12.50		17.30		0.30		1.02		0.92		1.07
		16	G67X	1571.0~1574.1	Ng	57.30		14.90		24.40		3.30		1.02		0.92		1.06
	洼陷带	17	WA102X	3162.6~3165.9	E $s 3 上$	57.30		19.10		22.10		1.50		1.15		1.01		0.80
		18	M25-18X	3382.2~3402.9	Es₃	67.20		16.40		14.40		2.00		1.15		1.07		0.48
		19	Q104X	3935.1~3946.4	E $s 3 下$	63.50		14.60		19.60		2.20		1.15		1.08		0.43
		20	Q105X	2720.0~2773.8	E $s 3 下$	66.40		15.50		14.40		3.60		1.21		1.11		0.63
凹陷	构造单元	编号	井号	井深(m)	层位	Ph/ nC₁₈	Pr/ Ph		C₂₉S/R		abb		S/H		G/ C₃₁H	C₃₁ S/R	C₂₉Ts/ C₃₀H
保定	清苑构造北侧	1	GB1X	2194.0~2198.0	Es₁	0.88	0.67		0.29		0.25		0.76		0.34	0.57	0.26
		2	G66	2622.2~2626.2	Es₁	1.01	0.63		0.26		0.24		0.93		0.42	0.57	0.25
		3	D20X	3071.0~3079.0	Es₁	1.71	0.43		0.25		0.21		1.12		0.52	0.57	0.25
	清苑构造主体带	4	G77-2X	1385.4~1395.8	Ed	102.37	0.15		0.24		0.20		4.28		1.59	0.52	0.06
		5	G77-1X	1737.0~1778.8	E $s 1 上$	13.70	0.17		0.27		0.20		4.48		0.98	0.51	0.04
		6	G77-10X	1701.0~1778.0	E $s 1 上$	21.34	0.16		0.25		0.20		4.64		1.02	0.50	0.04
		7	G77-11X	1320.8~1352.0	Ed₃	67.82	0.14		0.23		0.20		5.62		1.38	0.48	0.03
		8	G77X	1594.0~1600.4	Ed₃	71.55	0.16		0.26		0.20		4.27		0.97	0.51	0.04
		9	G79X	1568.0~1585.0	Ed₃	13.26	0.19		0.28		0.21		3.66		0.85	0.52	0.05
		10	BQ2	2086.4~2121.0	Ed₃	18.00	0.15		0.25		0.19		4.24		0.95	0.50	0.04
		11	BQ1X	1035.8~1054.4	Ed	14.90	0.24		0.28		0.21		3.30		1.04	0.56	0.07
饶阳	蠡县斜坡	12	N721X	3429.4~3457.0	E $s 1 下$	2.64	0.35		0.45		0.30		1.72		0.65	0.59	0.10
		13	G684	2423.0~2430.0	E $s 1 上$	8.54	0.20		0.24		0.20		3.46		1.25	0.54	0.07
		14	XL1	3266.0~3330.0	E $s 1 下$	7.20	0.23		0.22		0.20		3.59		1.39	0.51	0.07
		15	XL25X	3328.2~3342.1	E $s 1 下$	3.59	0.31		0.34		0.24		2.31		0.78	0.57	0.09
		16	G67X	1571.0~1574.1	Ng	3.87	0.30		0.38		0.25		2.31		0.78	0.58	0.10
	洼陷带	17	WA102X	3162.6~3165.9	E $s 3 上$	2.29	0.45		0.28		0.22		1.88		0.79	0.56	0.14
		18	M25-18X	3382.2~3402.9	Es₃	0.37	1.32		0.39		0.29		0.25		0.17	0.58	0.32
		19	Q104X	3935.1~3946.4	E $s 3 下$	0.25	1.91		0.47		0.47		0.20		0.08	0.57	0.20
		20	Q105X	2720.0~2773.8	E $s 3 下$	0.35	2.06		0.40		0.39		0.24		0.11	0.58	0.22

Fig.2 Total ion chromatograms of the saturated hydrocarbon fraction of oils from the Baoding-Raoyang Sag

Fig.3 Basic geochemical characteristics and genetic types of Tertiary crude oils from the Baoding-Raoyang Sag

Fig.4 Mass chromatograms of m/z 218 for saturates from partial Tertiary crude oils from the Baoding-Raoyang Sag

Fig.5 Mass chromatograms of m/z 191 for saturates from partial crude oils from the Baoding-Raoyang Sag

Fig.6 Composition and distribution of aromatic hydrocarbons in Tertiary crude oils from the Baoding-Raoyang Sag

Fig.7 Mass chromatograms of m/z 218 and m/z191 for saturates from partial Tertiary source rocks from the Baoding-Raoyang Sag

Fig.8 Thermal maturity and paleoenvironment longitudinal correlation for crude oils and source rocks from the Baoding-Raoyang Sag

Table 3 Geochemical parameters of Tertiary source rocks from the Baoding-Raoyang Sag

凹陷	构造单元	编号	井号	深度(m)		层位	岩性		Sat (%)		Ar (%)		Re (%)		Asp (%)		CPI	OEP	Pr/nC₁₇
保定凹陷	清苑构造带	1	GB1X	2114		Es₁	灰色泥岩		50.59		6.45		25.41		17.55		1.84	2.03	0.99
		2	GB1X	2130		Es₁	灰褐色油页岩		48.37		11.83		27.33		12.47		1.42	1.65	1.46
		3	GB1X	2138.3		Es₁	灰褐色油页岩		40.15		7.03		35.51		17.31		1.74	2.63	0.37
		4	GB1X	2138.6		Es₁	深灰色泥岩		33.88		5.99		44.17		15.96		2.00	3.53	0.46
		5	GB1X	2151		Es₁	灰色泥岩		44.63		10.77		38.21		6.39		1.99	3.65	0.45
		6	GB1X	2183		Es₁	灰色泥岩		42.83		12.48		26.62		18.07		1.65	2.75	0.86
		7	GB1X	2237		Es₁	灰色泥岩		46.32		4.55		32.13		17.00		1.59	2.44	0.79
		8	GB1X	2138		E $s 1 下$	青灰色泥岩		17.52		10.58		59.85		12.04		1.08	1.42	0.65
	洼陷带	9	BS2	2678.65		Es₁	深灰色泥岩		26.31		14.04		26.15		33.50		2.25	1.11	0.60
		10	BS2	2473.54		Es₁	深灰色泥岩		25.91		6.21		35.63		32.25		3.42	4.64	0.71
		11	BS2	2474.04		Es₁	灰色泥岩		32.78		4.12		49.31		13.79		2.12	4.72	1.37
		12	BS2	2481.64		Es₁	灰色泥岩		33.69		11.54		39.58		15.19		1.37	1.66	0.97
		13	BS2	2478.3		Es₁	灰色泥岩		19.87		10.09		41.96		28.08		2.30	1.22	0.87
		14	BS2	2681.5		Es₁	灰色泥页岩		14.05		11.35		28.65		45.95		1.24	1.02	1.02
饶阳凹陷	蠡县斜坡	15	XL25X	3337.7		E $s 1 下$	深灰色泥页岩		14.71		27.31		40.76		17.23		1.16	1.57	4.24
		16	XL25X	3340.9		E $s 1 下$	深灰色泥页岩		24.49		28.57		40.41		6.53		1.23	1.71	4.94
		17	B11X	3331.3		Es₁	深灰色泥岩		31.79		13.85		32.31		22.05		1.00	1.07	1.49
		18	B11X	3365.3		Es₁	深灰色泥岩		29.88		18.29		36.89		14.94		0.95	1.05	0.71
		19	G34	2513.8		E $s 1 下$	深灰色页岩		26.42		11.70		41.89		20.00		1.23	0.98	1.00
		20	G52	3095.5		E $s 1 下$	深灰色页岩		28.97		13.40		50.78		6.85		1.15	1.06	0.50
		21	G24	2615.7		E $s 1 下$	灰黑色页岩		23.34		14.41		53.31		8.93		1.02	1.02	0.71
		22	GB1X	2138.0		E $s 1 下$	青灰色泥岩		17.52		10.58		59.85		12.04		1.08	1.42	0.65
	洼陷带	23	M40	3653.7		Es_2-3	灰黑色泥岩		10.42		20.83		30.21		38.54		0.86	0.88	1.31
		24	M40	3763.1		Es_2-3	灰黑色页岩		30.53		25.19		29.26		15.01		0.80	0.76	2.23
		25	M40	3792.6		Es_2-3	灰黑色泥岩		26.18		24.29		29.97		19.56		0.82	0.64	0.76
		26	M305	3458.8		Es_2-3	深灰色泥岩		23.26		11.63		37.21		27.91		2.02	2.57	2.62
凹陷	构造单元	编号	井号		深度(m)	层位	Ph/nC₁₈	Pr/Ph		C₂₉S/R		abb		S/H		G/C₃₁H		C₃₁S/R	C₂₉Ts/ C₃₀H
保定凹陷	清苑构造带	1	GB1X		2114.00	Es₁	0.78	0.72		0.04		0.28		0.36		0.31		0.35	0.27
		2	GB1X		2130.00	Es₁	2.04	0.47		0.07		0.18		2.13		1.89		0.45	0.09
		3	GB1X		2138.30	Es₁	4.93	0.16		0.07		0.18		2.02		2.46		0.49	0.33
		4	GB1X		2138.60	Es₁	4.20	0.20		0.09		0.20		5.12		1.56		0.42	0.38
		5	GB1X		2151.00	Es₁	4.00	0.21		0.10		0.20		5.68		1.51		0.42	0.17
		6	GB1X		2183.00	Es₁	2.59	0.31		0.09		0.19		2.63		1.50		0.43	0.27
		7	GB1X		2237.00	Es₁	2.12	0.36		0.09		0.19		2.86		1.47		0.44	0.10
		8	GB1X		2138.00	E $s 1 下$	3.42	0.30		0.11		0.22		7.78		2.05		0.28	0.34
	洼陷带	9	BS2		2678.65	Es₁	1.23	0.58		0.09		0.26		1.33		0.35		0.36	0.19
		10	BS2		2473.54	Es₁	1.28	0.78		0.05		0.20		0.32		0.12		0.37	0.03
		11	BS2		2474.04	Es₁	1.78	0.74		0.04		0.21		0.29		0.09		0.38	0.04
		12	BS2		2481.64	Es₁	3.35	0.58		0.06		0.21		0.27		0.12		0.48	0.12
		13	BS2		2478.30	Es₁	2.07	0.53		0.08		0.24		0.77		0.22		0.36	0.06
		14	BS2		2681.50	Es₁	1.08	1.09		0.16		0.37		1.45		0.23		0.31	0.16
饶阳凹陷	蠡县斜坡	15	XL25X		3337.70	E $s 1 下$	67.80	0.14		0.26		0.20		1.50		0.51		0.54	0.12
		16	XL25X		3340.90	E $s 1 下$	71.60	0.16		0.31		0.22		1.81		0.57		0.54	0.12
		17	B11X		3331.30	Es₁	7.24	0.18		0.16		0.23		0.29		0.11		0.52	0.21
		18	B11X		3365.30	Es₁	1.59	0.49		0.19		0.22		0.79		0.35		0.51	0.07
		19	G34		2513.80	E $s 1 下$	0.60	0.99		0.17		0.20		4.27		2.99		0.45	0.16
		20	G52		3095.50	E $s 1 下$	0.36	1.31		0.19		0.22		5.23		1.65		0.41	0.11
		21	G24		2615.70	E $s 1 下$	1.44	0.47		0.13		0.22		8.03		2.16		0.42	0.22
		22	GB1X		2138.00	E $s 1 下$	3.42	0.30		0.11		0.22		7.78		2.05		0.28	0.34
	洼陷带	23	M40		3653.70	Es_2-3	6.43	0.23		0.39		0.20		0.26		0.09		0.58	0.09
		24	M40		3763.10	Es_2-3	5.16	0.39		0.42		0.31		1.66		0.31		0.56	0.16
		25	M40		3792.60	Es_2-3	0.86	0.88		0.44		0.35		0.62		0.39		0.56	0.26
		26	M305		3458.80	Es_2-3	1.54	1.68		0.30		0.22		1.04		0.38		0.54	0.10

Table 3 Geochemical parameters of Tertiary source rocks from the Baoding-Raoyang Sag

凹陷	构造单元	编号	井号	深度(m)		层位	岩性		Sat (%)		Ar (%)		Re (%)		Asp (%)		CPI	OEP	Pr/nC₁₇
保定凹陷	清苑构造带	1	GB1X	2114		Es₁	灰色泥岩		50.59		6.45		25.41		17.55		1.84	2.03	0.99
		2	GB1X	2130		Es₁	灰褐色油页岩		48.37		11.83		27.33		12.47		1.42	1.65	1.46
		3	GB1X	2138.3		Es₁	灰褐色油页岩		40.15		7.03		35.51		17.31		1.74	2.63	0.37
		4	GB1X	2138.6		Es₁	深灰色泥岩		33.88		5.99		44.17		15.96		2.00	3.53	0.46
		5	GB1X	2151		Es₁	灰色泥岩		44.63		10.77		38.21		6.39		1.99	3.65	0.45
		6	GB1X	2183		Es₁	灰色泥岩		42.83		12.48		26.62		18.07		1.65	2.75	0.86
		7	GB1X	2237		Es₁	灰色泥岩		46.32		4.55		32.13		17.00		1.59	2.44	0.79
		8	GB1X	2138		E $s 1 下$	青灰色泥岩		17.52		10.58		59.85		12.04		1.08	1.42	0.65
	洼陷带	9	BS2	2678.65		Es₁	深灰色泥岩		26.31		14.04		26.15		33.50		2.25	1.11	0.60
		10	BS2	2473.54		Es₁	深灰色泥岩		25.91		6.21		35.63		32.25		3.42	4.64	0.71
		11	BS2	2474.04		Es₁	灰色泥岩		32.78		4.12		49.31		13.79		2.12	4.72	1.37
		12	BS2	2481.64		Es₁	灰色泥岩		33.69		11.54		39.58		15.19		1.37	1.66	0.97
		13	BS2	2478.3		Es₁	灰色泥岩		19.87		10.09		41.96		28.08		2.30	1.22	0.87
		14	BS2	2681.5		Es₁	灰色泥页岩		14.05		11.35		28.65		45.95		1.24	1.02	1.02
饶阳凹陷	蠡县斜坡	15	XL25X	3337.7		E $s 1 下$	深灰色泥页岩		14.71		27.31		40.76		17.23		1.16	1.57	4.24
		16	XL25X	3340.9		E $s 1 下$	深灰色泥页岩		24.49		28.57		40.41		6.53		1.23	1.71	4.94
		17	B11X	3331.3		Es₁	深灰色泥岩		31.79		13.85		32.31		22.05		1.00	1.07	1.49
		18	B11X	3365.3		Es₁	深灰色泥岩		29.88		18.29		36.89		14.94		0.95	1.05	0.71
		19	G34	2513.8		E $s 1 下$	深灰色页岩		26.42		11.70		41.89		20.00		1.23	0.98	1.00
		20	G52	3095.5		E $s 1 下$	深灰色页岩		28.97		13.40		50.78		6.85		1.15	1.06	0.50
		21	G24	2615.7		E $s 1 下$	灰黑色页岩		23.34		14.41		53.31		8.93		1.02	1.02	0.71
		22	GB1X	2138.0		E $s 1 下$	青灰色泥岩		17.52		10.58		59.85		12.04		1.08	1.42	0.65
	洼陷带	23	M40	3653.7		Es_2-3	灰黑色泥岩		10.42		20.83		30.21		38.54		0.86	0.88	1.31
		24	M40	3763.1		Es_2-3	灰黑色页岩		30.53		25.19		29.26		15.01		0.80	0.76	2.23
		25	M40	3792.6		Es_2-3	灰黑色泥岩		26.18		24.29		29.97		19.56		0.82	0.64	0.76
		26	M305	3458.8		Es_2-3	深灰色泥岩		23.26		11.63		37.21		27.91		2.02	2.57	2.62
凹陷	构造单元	编号	井号		深度(m)	层位	Ph/nC₁₈	Pr/Ph		C₂₉S/R		abb		S/H		G/C₃₁H		C₃₁S/R	C₂₉Ts/ C₃₀H
保定凹陷	清苑构造带	1	GB1X		2114.00	Es₁	0.78	0.72		0.04		0.28		0.36		0.31		0.35	0.27
		2	GB1X		2130.00	Es₁	2.04	0.47		0.07		0.18		2.13		1.89		0.45	0.09
		3	GB1X		2138.30	Es₁	4.93	0.16		0.07		0.18		2.02		2.46		0.49	0.33
		4	GB1X		2138.60	Es₁	4.20	0.20		0.09		0.20		5.12		1.56		0.42	0.38
		5	GB1X		2151.00	Es₁	4.00	0.21		0.10		0.20		5.68		1.51		0.42	0.17
		6	GB1X		2183.00	Es₁	2.59	0.31		0.09		0.19		2.63		1.50		0.43	0.27
		7	GB1X		2237.00	Es₁	2.12	0.36		0.09		0.19		2.86		1.47		0.44	0.10
		8	GB1X		2138.00	E $s 1 下$	3.42	0.30		0.11		0.22		7.78		2.05		0.28	0.34
	洼陷带	9	BS2		2678.65	Es₁	1.23	0.58		0.09		0.26		1.33		0.35		0.36	0.19
		10	BS2		2473.54	Es₁	1.28	0.78		0.05		0.20		0.32		0.12		0.37	0.03
		11	BS2		2474.04	Es₁	1.78	0.74		0.04		0.21		0.29		0.09		0.38	0.04
		12	BS2		2481.64	Es₁	3.35	0.58		0.06		0.21		0.27		0.12		0.48	0.12
		13	BS2		2478.30	Es₁	2.07	0.53		0.08		0.24		0.77		0.22		0.36	0.06
		14	BS2		2681.50	Es₁	1.08	1.09		0.16		0.37		1.45		0.23		0.31	0.16
饶阳凹陷	蠡县斜坡	15	XL25X		3337.70	E $s 1 下$	67.80	0.14		0.26		0.20		1.50		0.51		0.54	0.12
		16	XL25X		3340.90	E $s 1 下$	71.60	0.16		0.31		0.22		1.81		0.57		0.54	0.12
		17	B11X		3331.30	Es₁	7.24	0.18		0.16		0.23		0.29		0.11		0.52	0.21
		18	B11X		3365.30	Es₁	1.59	0.49		0.19		0.22		0.79		0.35		0.51	0.07
		19	G34		2513.80	E $s 1 下$	0.60	0.99		0.17		0.20		4.27		2.99		0.45	0.16
		20	G52		3095.50	E $s 1 下$	0.36	1.31		0.19		0.22		5.23		1.65		0.41	0.11
		21	G24		2615.70	E $s 1 下$	1.44	0.47		0.13		0.22		8.03		2.16		0.42	0.22
		22	GB1X		2138.00	E $s 1 下$	3.42	0.30		0.11		0.22		7.78		2.05		0.28	0.34
	洼陷带	23	M40		3653.70	Es_2-3	6.43	0.23		0.39		0.20		0.26		0.09		0.58	0.09
		24	M40		3763.10	Es_2-3	5.16	0.39		0.42		0.31		1.66		0.31		0.56	0.16
		25	M40		3792.60	Es_2-3	0.86	0.88		0.44		0.35		0.62		0.39		0.56	0.26
		26	M305		3458.80	Es_2-3	1.54	1.68		0.30		0.22		1.04		0.38		0.54	0.10

Fig.9 Correlation based on biomarker indicating paleoenvironment and organic matter for Tertiary oils and source rocks from the Baoding-Raoyang Depression

Fig.10 Distribution of O2 species detected by negative ESI FT-ICR MS in crude oils from the Qingyuan Tectonic Belt

Fig.11 Variation in thermal maturity with burial depth for Es1 source rocks from the Qingyuan Tectonic Belt to the Lixian Slope

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