海陆相泥页岩气体生成的半封闭模拟实验

宋董军; 吴陈君; 陈科; 张明峰; 何薇; 苏龙; 张东伟; 付爽; 妥进才

doi:10.3799/dqkx.2019.197

Volume 44 Issue 11

Nov. 2019

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Article Navigation > Earth Science > 2019 > 44(11): 3639-3652

Song Dongjun, Wu Chenjun, Chen Ke, Zhang Mingfeng, He Wei, Su Long, Zhang Dongwei, Fu Shuang, Tuo Jincai, 2019. Gas Generation from Marine and Terrestrial Shales by Semi-Closed Pyrolysis Experiments. Earth Science, 44(11): 3639-3652. doi: 10.3799/dqkx.2019.197

Citation:

Song Dongjun, Wu Chenjun, Chen Ke, Zhang Mingfeng, He Wei, Su Long, Zhang Dongwei, Fu Shuang, Tuo Jincai, 2019. Gas Generation from Marine and Terrestrial Shales by Semi-Closed Pyrolysis Experiments. Earth Science, 44(11): 3639-3652. doi: 10.3799/dqkx.2019.197

Citation:

Song Dongjun, Wu Chenjun, Chen Ke, Zhang Mingfeng, He Wei, Su Long, Zhang Dongwei, Fu Shuang, Tuo Jincai, 2019. Gas Generation from Marine and Terrestrial Shales by Semi-Closed Pyrolysis Experiments. Earth Science, 44(11): 3639-3652. doi: 10.3799/dqkx.2019.197

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Gas Generation from Marine and Terrestrial Shales by Semi-Closed Pyrolysis Experiments

doi: 10.3799/dqkx.2019.197

Song Dongjun^{1,2
,
,},
Wu Chenjun¹,
Chen Ke³,
Zhang Mingfeng¹,
He Wei^1,2,
Su Long¹,
Zhang Dongwei^1,2,
Fu Shuang^1,2,
Tuo Jincai^{1
,
,}

1.
Key Laboratory of Petroleum Resources, Gansu Province; Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Oil & Gas Survey, China Geological Survey, Beijing 100083, China

Received Date: 2019-08-05
Publish Date: 2019-11-15

Abstract

Abstract

Understanding differences of shale gas generation in different sedimentary environments has great significance to fully elucidate genesis mechanisms and geochemical characteristics of shale gas. In this study,semi-closed pyrolysis experiments were conducted on two lower-mature shales,including a marine shale from Hongshuizhuang Formation of Mesoproterozoic and a terrestrial mudstone from the Chang 7 Member of Yanchang Formation of Upper Triassic. The pyrolyzed gas productions were performed for gas constituent and carbon isotope analysis,aiming to investigate influences on gas generation from the nature of organic matter,mineralogical characteristics and rock fabric. The results show the discrepancy of sources of organic matter exists in the two shales,causing the amount of gas generated from Hongshuizhuang shale was lower than that of the Chang 7 Member under the same pyrolysis temperature. Meanwhile,the secondary cracking content of gas productions in the Chang 7 Member mudstone was relatively high. Organic matter in Hongshuizhuang Formation is oil-prone,but organic matter in the Chang 7 Member mudstone is relatively gas-prone due to mixture of continental materials. Moreover,the transformation process from pyrite to pyrrhotine also can be conducive to advancing the generation of hydrocarbon gas in the Chang 7 Member mudstone. The rock fabrics used in the pyrolysis experiments would lead to different cracking behaviors of gas. In this scenario,the characteristics of high methane composition and rollover of carbon isotope of shale gas in the South China may be associated with higher retention of oil and gas in those thick shales.
- marine shale,
- continental mudstone,
- semi-closed pyrolysis experiment,
- hydrocarbon gas,
- expulsion efficiency,
- difference,
- petroleum geology

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致谢: 感谢匿名审稿人对本文提出的宝贵意见和建议.

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Gas Generation from Marine and Terrestrial Shales by Semi-Closed Pyrolysis Experiments

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