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Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration
Wu, Yingqin1; Liu, Yanhong1; Wang, Tong2; Wang, Zhiyu1,3; Yuan, Longmiao1,3; Xia, Yanqin1
2021-09-17
Source PublicationFRONTIERS IN EARTH SCIENCE
Volume9Pages:8
AbstractIn 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.
Keywordpyrolysis hydrocarbon source rocks organic matter types gas carbon isotope isotope inversion
DOI10.3389/feart.2021.620161
Funding OrganizationNational Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; National Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; National Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; National Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project
WOS KeywordFORT-WORTH BASIN ; NATURAL-GAS ; BARNETT SHALE ; OIL CRACKING ; ORDOS BASIN ; GENERATION ; PYROLYSIS ; FRACTIONATION ; EVOLUTION ; REVERSAL
Language英语
Funding ProjectNational Science Foundation[42072180] ; National Science Foundation[41772147] ; National Science Foundation[41272147] ; National Science Foundation[41831176] ; National Key R&D Program of China[2017YFA0604803] ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project[E0280101]
Funding OrganizationNational Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; National Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; National Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; National Science Foundation ; National Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project ; Chinese Academy of Sciences Instrument Equipment Function Development Technology Innovation Project
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000728822500001
PublisherFRONTIERS MEDIA SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/103907
Collection兰州油气中心
Corresponding AuthorWu, Yingqin
Affiliation1.Chinese Acad Sci, Gansu Prov Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou, Peoples R China
2.Newcastle Univ, Sch Engn, Newcastle, England
3.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
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]. FRONTIERS IN EARTH SCIENCE,2021,9:8.
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,9,8.
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):8.
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