气候变化领域集成服务门户(CCPortal): Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration

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DOI	10.3389/feart.2021.620161
	Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration
	Wu, Yingqin; Liu, Yanhong; Wang, Tong; Wang, Zhiyu; Yuan, Longmiao; Xia, Yanqin
通讯作者	Wu, YQ (通讯作者)，Chinese Acad Sci, Gansu Prov Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou, Peoples R China.
发表日期	2021
EISSN	2296-6463
卷号	9
英文摘要	In order to understand the influence of source rock types and maturity on hydrocarbon gases carbon isotope change more objectively, a closed-system pyrolysis experiment was carried out on six samples from 250 to 550 degrees C. The values of delta C-13(1), delta C-13(2), and delta C-13(3) were ranged from -73.3 to -29.8%, from -36.3 to -9.5%, and from -38.5 to -12.4%, respectively. The range of delta C-13(1) was the largest, reaching a top value of 43.5%. The results showed that the temperature has an effect on the carbon isotope value of pyrolysis gas. With the increase of the degree of thermal evolution, the carbon isotope value of methane in all samples, except for huangxian gangue, had a change trend from heavy to light firstly, then got heavier. In addition, the carbon isotope values of methane, ethane and propane had the features of delta C-13(1) < delta C-13(2) < delta C-13(3) when the temperatures were under 550 degrees C, which were made up of a series of positive carbon isotopes. However, when the temperature increased above 550 degrees C, there was an inversion of the simulated gas carbon isotope values in Huangxian coal gangue, Minqin oil shale and Huaan carbonaceous shale, i.e., delta C-13(2) > delta C-13(3) and delta C-13(2) > delta(1)3C(1). It indicates that the secondary cracking has occurred at high maturity or over maturity stage.
关键词	FORT-WORTH BASIN NATURAL-GAS BARNETT SHALE OIL CRACKING ORDOS BASIN GENERATION PYROLYSIS FRACTIONATION EVOLUTION REVERSAL
英文关键词	pyrolysis; hydrocarbon source rocks; organic matter types; gas carbon isotope; isotope inversion
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000728822500001
来源期刊	FRONTIERS IN EARTH SCIENCE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253663
作者单位	[Wu, Yingqin; Liu, Yanhong; Wang, Zhiyu; Yuan, Longmiao; Xia, Yanqin] Chinese Acad Sci, Gansu Prov Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou, Peoples R China; [Wang, Tong] Newcastle Univ, Sch Engn, Newcastle, England; [Wang, Zhiyu; Yuan, Longmiao] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yingqin,Liu, Yanhong,Wang, Tong,et al. Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration[J]. 中国科学院西北生态环境资源研究院,2021,9.
APA	Wu, Yingqin,Liu, Yanhong,Wang, Tong,Wang, Zhiyu,Yuan, Longmiao,&Xia, Yanqin.(2021).Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration.FRONTIERS IN EARTH SCIENCE,9.
MLA	Wu, Yingqin,et al."Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration".FRONTIERS IN EARTH SCIENCE 9(2021).