延长探区延长组陆相页岩气地球化学特征和成因

徐红卫; 李贤庆; 周宝刚; 杨杰; 张伟; 王哲; 高文杰

延长探区延长组陆相页岩气地球化学特征和成因

徐红卫^1,2,
李贤庆^1,2,
周宝刚^1,2,
杨杰^1,2,
张伟^1,2,
王哲^1,2,
高文杰^1,2

1.
煤炭资源与安全开采国家重点实验室,北京100083;2.中国矿业大学(北京)地球科学与测绘工程学院,北京100083

基金项目: 国家自然科学基金(41572125);国土资源部公益性行业科研专项基金(201311022);国家科技重大专项(2016ZX05007-003)

详细信息

作者简介:
徐红卫(1990—),男,河北邢台人,硕士研究生,主要从事页岩气地质、地球化学方面的研究工作。

中图分类号: P236
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出版历程
- 收稿日期: 2016-10-08
- 刊出日期: 2017-04-29

Geochemical characteristics and genesis of the Yanchang Formation terrestrial shale gas in the Yanchang exploration area

Xu Hongwei^1,2,
Li Xianqing^1,2,
Zhou Baogang^1,2,
Yang Jie^1,2,
Zhang Wei^1,2,
Wang Zhe^1,2,
Gao Wenjie^1,2

1.
State Key Laboratory of Coal Resources and Safe Mining,Beijing 100083,China;2.College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China

摘要

摘要: 通过页岩气样品的气体组分含量及稳定碳、氢同位素分析,对鄂尔多斯盆地东南部延长探区上三叠统延长组陆相页岩气地球化学特征进行了研究,探讨了延长探区延长组陆相页岩气成因和来源.结果表明:①延长探区延长组页岩气以烷烃类气体为主(87.89%～99.66%),甲烷含量均小于95%(60.44%～91.68%),重烃组分含量高,干燥系数较低(64.00%～93.43%),非烃气体含量低(以N₂和CO₂为主,分别为0.68%和1.36%),为典型的湿气;②延长探区延长组页岩气甲烷、乙烷、丙烷和丁烷碳同位素值分别分布在–53.4‰～–46.3‰、–39.7‰～–31.9‰、–34.3‰～–29.6‰和–33.8‰～–25.0‰之间,碳同位素总体上表现为δ¹³C₁<δ¹³C₂ <δ¹³C₃<δ¹³C₄的正碳同位素序列,仅少部分样品δ¹³C₃ 和δ¹³C₄发生倒转;③延长探区延长组页岩气以热成因气为主,主要为来源于低熟—成熟阶段的偏腐泥型页岩干酪根裂解形成的油型气.
- 陆相页岩气 /
- 地球化学特征 /
- 碳氢同位素 /
- 延长组 /
- 延长探区
Abstract: Through analyzing the gas composition and isotopes of carbon and hydrogen of the shale gas samples,the geochemical characteristics of the upper Triassic Yanchang Formation shale from the Yanchang exploration area in the southeastern Ordos basin were studied.The genesis and source of the Yanchang Formation shale gas in the Yanchang exploration area were also discussed.The results show that:①Shale gas of Yanchang Formation in the Yanchang exploration area mainly consist of hydrocarbon gases (87.89%~99.66%),with methane content less than 95% (60.44%~91.68%),high content of heavy hydrocarbon component,relatively lower dry coefficient（64.00%~93.43%）,and low non-hydrocarbon gases content (mainly N₂ and CO₂,0.68% and 1.36%,respectively ),belongs to typical wet gas.②The carbon isotope values of methane,ethane,propane and butane of Yanchang Formation shale gas in the Yanchang exploration area are mainly distributed in -53.4‰~-46.3 ‰,-39.7 ‰~-31.9 ‰,-34.3 ‰~-29.6 ‰ and -33.8 ‰~-25.0 ‰.The carbon isotope of Yanchang Formation shale gas in the Yanchang exploration area is mainly characterized by δ¹³C₁<δ¹³C₂ <δ¹³C₃ <δ¹³C₄.Only a small number of samples of the δ¹³C₃and δ¹³C₄are reversal.③Shale gas of Yanchang Formation in the Yanchang exploration area is dominated by thermogenic gas,mainly oil type gas formed by kerogen cracking that from the lowmature and mature stage of the partial sapropel type shale.
- terrestrial shale gas /
- geochemical characteritic /
- carbon and hydrogen isotopes /
- Yanchang Formation /
- the Yanchang exploration area

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延长探区延长组陆相页岩气地球化学特征和成因

作者简介:
徐红卫(1990—),男,河北邢台人,硕士研究生,主要从事页岩气地质、地球化学方面的研究工作。

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Geochemical characteristics and genesis of the Yanchang Formation terrestrial shale gas in the Yanchang exploration area

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留言板

延长探区延长组陆相页岩气地球化学特征和成因

作者简介: 徐红卫(1990—),男,河北邢台人,硕士研究生,主要从事页岩气地质、地球化学方面的研究工作。

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出版历程

Geochemical characteristics and genesis of the Yanchang Formation terrestrial shale gas in the Yanchang exploration area

计量

出版历程

目录

作者简介:
徐红卫(1990—),男,河北邢台人,硕士研究生,主要从事页岩气地质、地球化学方面的研究工作。