渤海湾盆地东濮凹陷北部页岩油富集类型和烃类组成特征——以文410井古近系沙河街组三段为例

冷筠滢; 钱门辉; 鹿坤; 徐二社; 周勇水; 鲍云杰; 李志明; 蒋启贵

doi:10.11781/sysydz2022061028

渤海湾盆地东濮凹陷北部页岩油富集类型和烃类组成特征——以文410井古近系沙河街组三段为例

doi: 10.11781/sysydz2022061028

冷筠滢^{1, 2, 3,},
钱门辉^{1, 2, 3, ,},
鹿坤⁴,
徐二社^{1, 2, 3},
周勇水⁴,
鲍云杰^{1, 2, 3},
李志明^{1, 2, 3},
蒋启贵^{1, 2, 3}

1.
中国石化石油勘探开发研究院无锡石油地质研究所，江苏无锡 214126
2.
页岩油气富集机理与有效开发国家重点实验室，江苏无锡 214126
3.
中国石化油气成藏重点实验室，江苏无锡 214126
4.
中国石化中原油田分公司勘探开发研究院，河南濮阳 457001

基金项目:

国家自然科学基金项目 42090022

国家科技重大专项 2017ZX05049001

国家重点基础研究发展计划(973)项目 2014CB239101

详细信息

作者简介:
冷筠滢(1994—)，女，硕士，从事油气地球化学研究。E-mail: lengjy2986.syky@sinopec.com

通讯作者:
钱门辉(1985—)，男，硕士，副研究员，从事页岩油气地球化学、石油实验地质研究。E-mail: qianmh.syky@sinopec.com

中图分类号: TE122.116
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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-15
- 修回日期: 2022-10-09
- 刊出日期: 2022-11-28

Enrichment types and hydrocarbon composition characteristics of shale oil in the northern part of Dongpu Sag, Bohai Bay Basin: a case study of the third member of Paleogene Shahejie Formation of well Wen 410

LENG Junying^{1, 2, 3
,},
QIAN Menhui^{1, 2, 3
, ,},
LU Kun⁴,
XU Ershe^{1, 2, 3},
ZHOU Yongshui⁴,
BAO Yunjie^{1, 2, 3},
LI Zhiming^{1, 2, 3},
JIANG Qigui^{1, 2, 3}

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu 214126, China
3.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China
4.
Research Institute of Exploration and Development, SINOPEC Zhongyuan Oilfield Company, Puyang, Henan 457001, China

摘要

摘要: 为研究渤海湾盆地东濮凹陷北部页岩油的含油性及烃类组成特征，对文410井古近系沙河街组三段岩心样品开展了冷冻热解、三维定量荧光、气相色谱—质谱、岩石薄片等分析测试。东濮凹陷北部沙三段主要发育夹层型和裂缝型2种页岩油富集类型，烃类赋存主要为粒间孔和微裂缝2种形式，有效孔缝组合是页岩油高效富集的关键；岩心样品抽提物烃类组成特征主要以低碳数正构烷烃为主，C₂₇—C₂₈—C₂₉规则甾烷呈“V”型分布，反映出有机质来源主要为陆生高等植物与低等水生生物；伽马蜡烷含量较高，较低的Pr/Ph比值，反映该区有机质沉积环境主要为咸化的还原环境；结合C₃₁22S/(22S+22R)、Ts/(Ts+Tm)、C₂₉ααα20S/(20S+20R)、C₂₉ββ/(αα+ββ)等参数，表明烃源岩处于成熟阶段。
- 烃类组成 /
- 赋存形式 /
- 页岩油 /
- 沙河街组 /
- 古近系 /
- 东濮凹陷 /
- 渤海湾盆地
Abstract: To reveal the oil-bearing characteristics and hydrocarbon composition of shale oils in the third member of Shahejie Formation in the northern part of Dongpu Sag, Bohai Bay Basin, analysis and testing were carried out by the means of frozen-craching followed by pyrolysis, 3D quantitative fluorescence test, GC-MS and thin section observation. Two shale oil enrichment types including interlayer type and fracture type are mainly developed in the third member of Shahejie Formation of well Wen 410. The hydrocarbon mainly occurres in inter-granular pores and micro-fractures, and effective pore-fracture combination is the key to the efficient enrichment of shale oil. The hydrocarbon composition of rock extracts is mainly characterized by n-alkanes with low carbon numbers, and the regular steranes of C₂₇-C₂₈-C₂₉ show a V-shaped distribution, reflecting that the sources of organic matter are mainly terrestrial higher plants and lower aquatic organisms. The high content of gammacerane and the low Pr/Ph ratio indicate that the sedimentary environment in this area is mainly a saline reducing environment. C₃₁22S/(22S+22R), Ts/(Ts+Tm), C₂₉ααα20S/(20S+20R), C₂₉ββ/(αα+ββ) and other biomarker parameters indicate that the source rocks are at mature stage.
- hydrocarbon composition /
- occurrence form /
- shale oil /
- Shahejie Formation /
- Paleogene /
- Dongpu Sag /
- Bohai Bay Basin

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图 1 渤海湾盆地东濮凹陷北部构造位置与地层柱状图

Figure 1. Geotectonic location and stratigraphic histogram of Paleogene in the northern part of Dongpu Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 2 渤海湾盆地东濮凹陷北部文410井沙三段含油性特征

Figure 2. Oil-bearing characteristics of third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 3 渤海湾盆地东濮凹陷北部文410井沙三段夹层型和裂缝型页岩油富集段岩心照片

Figure 3. Core photos of interbedded and fractured shale oil enrichment sections in third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 4 渤海湾盆地东濮凹陷北部文410井沙三段代表性样品生物标志化合物特征

Figure 4. Biomarker characteristics of representative samples from third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

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图 5 渤海湾盆地东濮凹陷北部文410井沙三段典型样品CPI与OEP相关图

Figure 5. Plots of CPI and OEP of typical samples from third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 6 渤海湾盆地东濮凹陷北部文410井沙三段烃源岩样品Ph/nC₁₈—Pr/nC₁₇相关图

Figure 6. Plots of Ph/nC₁₈-Pr/nC₁₇ of source rock samples from third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

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图 7 渤海湾盆地东濮凹陷北部文410井沙三段的典型样品C₂₉ααα20S/(20S+20R)与C₂₉ββ/(αα+ββ) 甾烷参数相关图

Figure 7. Plots of sterane parameter values between C₂₉ααα20S/(20S+20R) and C₂₉ββ/(αα+ββ) in third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

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图 8 渤海湾盆地东濮凹陷北部文410井沙三段不同岩性典型含油样品镜下特征

a.长石发育溶蚀孔隙，棕色油斑粉砂岩，3 570.74 m，扫描电镜；b.石英次生加大Ⅰ-Ⅱ级，粒间白云石，棕色油斑粉砂岩，3 570.74 m，扫描电镜；c.长石发育溶蚀孔隙，深灰色泥质白云岩，3 566.60 m，扫描电镜；d.白云石发育少量溶蚀孔隙、石盐、黏土矿物充填式胶结，深灰色泥质白云岩，3 566.60 m，扫描电镜；e.见有机质，部分浸染碎屑，棕色油斑粉砂岩，3 570.74 m，荧光薄片；f.沥青主要分布于粒间，呈斑块状、点状，以亮蓝色、黄褐色为主，发光强度较亮，为油质沥青，棕色油斑粉砂岩，3 570.74 m，荧光薄片；g.见有机质，部分浸染碎屑，见构造缝，深灰色泥质白云岩，3 566.60 m，荧光薄片；h.构造缝呈淡黄色、淡蓝色，发光强度较亮，为油质沥青，深灰色泥质白云岩，3 566.60 m，荧光薄片

Figure 8. Microscopic characteristics of typical oil-bearing samples with different lithologies from third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

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表 1 渤海湾盆地东濮凹陷北部文410井沙三段烃源岩抽提物烷烃参数

Table 1. Alkane parameters of source rock sample extracts from third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

深度/m	岩性	CPI	Pr/Ph	Pr/nC₁₇	Ph/nC₁₈
3 546.84	灰色灰质泥岩	1.15	1.35	0.84	0.99
3 556.75	深灰色粉砂质泥岩夹砂岩条带	1.00	1.49	0.42	0.59
3 566.60	深灰色泥岩	0.99	0.80	0.16	0.20
3 567.12	深灰色泥质白云岩	1.00	0.85	0.16	0.19
3 570.52	棕色油斑粉砂岩	0.97	0.18	0.37	1.56
3 573.81	棕色油斑粉砂岩	0.98	0.36	0.47	1.71
3 574.12	深灰色泥岩	0.98	0.30	0.61	2.96
3 579.04	灰色泥质粉砂岩	0.80	0.20	0.45	2.09
3 583.93	深灰色页岩	0.89	0.20	0.36	2.00
3 588.36	灰色白云质泥岩	0.97	0.37	0.18	0.49
3 589.00	灰色白云质泥岩	0.98	0.35	0.18	0.47
3 589.95	灰色泥岩	0.96	0.37	0.17	0.46
3 596.17	深灰色泥岩	0.93	1.00	0.27	0.48

下载: 导出CSV

表 2 渤海湾盆地东濮凹陷北部文410井沙三段烃源岩抽提物藿烷和芳香烃系列化合物相关参数

Table 2. Selected parameters related to hopanes and aromatic hydrocarbon of source rock extracts from third member of Shahejie Formation in well Wen 410, northern part of Dongpu Sag, Bohai Bay Basin

深度/m	C₃₀莫烷/C₃₀藿烷	C₃₁22S/(22S+22R)	Ts/(Ts+Tm)	Ga/C₃₀H	C₂₇重排/规则甾烷	C₂₉ααα20S/(20S+20R)	C₂₉ββ/(αα+ββ)	MPI₁	R_c
3 566.60	0.12	0.58	0.43	0.20	0.74	0.48	0.46	0.35	0.61
3 567.12	0.06	0.60	0.44	0.10	0.59	0.48	0.47	0.35	0.61
3 570.52	0.14	0.59	0.23	0.50	0.18	0.52	0.40	0.42	0.65
3 573.81	0.02	0.61	0.56	0.41	0.37	0.53	0.49	0.41	0.65
3 574.12	0.10	0.61	0.60	0.36	0.40	0.52	0.50	0.44	0.66
3 579.04	0.13	0.56	0.24	0.67	0.17	0.50	0.41	0.51	0.71
3 583.93	0.13	0.57	0.49	0.84	0.26	0.51	0.46	0.45	0.67
3 588.36	0.12	0.56	0.47	0.34	0.42	0.46	0.48	0.42	0.65
3 589.00	0.12	0.56	0.48	0.37	0.41	0.45	0.46	0.43	0.66
3 589.95	0.12	0.57	0.37	0.32	0.42	0.55	0.43	0.41	0.65
3 596.17	0.02	0.61	0.60	0.16	0.17	0.52	0.53	0.31	0.59

下载: 导出CSV

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