冀中坳陷保定凹陷清苑构造带低熟油成因解析

doi:10.19657/j.geoscience.1000-8527.2024.106

摘要/Abstract

摘要：

冀中坳陷保定凹陷清苑构造带近年取得了重大油气勘探突破,油气的来源及其成因有待进一步确认。采用色谱-质谱、高分辨率质谱等地球化学途径,对该区油气的主力烃源岩及油气成因进行了精细剖析。清苑构造带主体原油为含蜡(均值8.12%)、含硫(均值0.81%)的重质油,具有低Pr/Ph (0.14~0.24)、高甾烷/藿烷(3.3~5.6)、高伽马蜡烷和三芳甾烷相对丰度(40%~61%)、低甾烷异构化程度(C₂₉甾烷ααα20S/(S+R)=0.23~0.28)等特征,为典型的强还原咸水相原油。油-油、油源对比表明,清苑构造带主体原油和相邻的蠡县斜坡原油特征相似,与蠡县斜坡沙一段咸水相泥页岩具有较好的亲缘关系,主力烃源岩埋深>3000 m,与保定凹陷烃源岩未显示相关性。高分辨率质谱分析表明,清苑构造带原油富含O₁、O₂类化合物,特别是等效双键数(DBE)为1、5的O₂类化合物(分别主要为脂肪酸和甾烷酸),其低温降解成烃是低熟油形成的重要机制,饶阳凹陷蠡县斜坡及相邻的生油洼陷发育处于生油窗阶段的、热演化程度相对不高的沙一段烃源岩是该区低熟油形成的前提。

关键词: 保定凹陷, 清苑构造带, 低熟油, 生物标志物, 高分辨率质谱, 油气成因机制

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

中图分类号:

李小冬, 李志军, 李熹微, 马学峰, 李晓燕, 陈柯童, 张霁潮, 许梦婷, 张瑞雪, 秦梦华, 王成云, 刘佳, 张建淼, 施倩倩, 李素梅. 冀中坳陷保定凹陷清苑构造带低熟油成因解析[J]. 现代地质, 2024, 38(05): 1338-1353.

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.

图/表 14

图1 冀中坳陷保定—饶阳凹陷区域构造图(a)及油气分布(b)

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

表1 清苑构造带原油物性特征(据华北油田勘探开发研究院数据库,2022)

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)

表2 保定—饶阳凹陷部分第三系原油基本地球化学参数

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

表2 保定—饶阳凹陷部分第三系原油基本地球化学参数

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

图2 保定—饶阳凹陷第三系原油饱和烃总离子流图

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

图3 保定—饶阳凹陷第三系原油基本特征与成因类型分类 (a)Pr/nC17-Ph/nC18关系图;(b) Pr/Ph-DBT/P关系图,DBT为二苯并噻吩,P为菲

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

图4 保定—饶阳凹陷第三系原油饱和烃m/z 218质量色谱图

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

图5 保定—饶阳凹陷第三系原油饱和烃m/z 191质量色谱图 (a)清苑构造带北侧; (b)清苑构造主体带; (c)蠡县斜坡

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

图6 保定—饶阳凹陷第三系原油芳烃组成与分布特征 (a)清苑构造主体带原油; (b)蠡县斜坡原油; (c)清苑构造带北侧原油; (d)饶阳凹陷沙三段原油

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

图7 保定—饶阳凹陷第三系烃源岩饱和烃m/z 218、m/z 191质量色谱图 (a)清苑构造带—蠡县斜坡Es1浅埋源岩(Es1); (b)蠡县斜坡Es1深埋源岩;(c)保定—蠡县斜坡Es2+3烃源岩

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

图8 保定—饶阳凹陷第三系原油、烃源岩生标成熟度、沉积环境参数纵向对比

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

表3 保定—饶阳凹陷第三系烃源岩地球化学参数

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

表3 保定—饶阳凹陷第三系烃源岩地球化学参数

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

图9 保定—饶阳凹陷第三系原油、烃源岩沉积环境与生源参数聚类对比((c)(d)图中的彩色阴影为(a)(b)图原油的分布区域)

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

图10 清苑构造带部分原油O2类化合物高分辨率质谱分布特征 (a)(c)分别为BQ2、G77-10井O2类化合物碳数、等价双键数与强度关系图;(b)O2类化合物不同等价双键数相对丰度;(d)等价双键数为5的O2类化合物不同碳数相对丰度

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

图11 清苑构造带—蠡县斜坡沙一段烃源岩成熟度随埋深变化特征

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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