气候变化领域集成服务门户(CCPortal): Light Hydrocarbon (C-5-C-7) Geochemistry in the Northern Margin of the Qaidam Basin, Northeastern Tibetan Plateau: Gas Mixing and Hydrocarbon Charge History

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DOI	10.1021/acsomega.1c04449
	Light Hydrocarbon (C-5-C-7) Geochemistry in the Northern Margin of the Qaidam Basin, Northeastern Tibetan Plateau: Gas Mixing and Hydrocarbon Charge History
	Chen, Kefei; Zhang, Chen; Zhou, Shixin; Li, Jing; Liu, Shaolin
通讯作者	Liu, SL (通讯作者)，Minist Emergency Management China, Natl Inst Nat Hazards, Beijing 100085, Peoples R China. ; Zhou, SX (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	2470-1343
起始页码	32709
结束页码	32721
卷号	6 期号:48
英文摘要	Twenty natural gases from the northern margin of the Qaidam Basin were collected and examined for the composition and stable carbon isotopic characteristics of gas and light hydrocarbons (C-5-C-7). The results reveal that the carbon isotopes of isoalkanes and cyclo-alkanes in light hydrocarbons are mainly controlled by the bioprecursors, whereas the carbon isotopes of n-alkanes and aromatics in light hydrocarbons are primarily influenced by the bioprecursors and maturity. Based on the genetic types obtained from C-1-C-3 and C-5-C-7 fractions, three types of gases are identified: coal-type gas, oil-type gas, and mixed gas. Coal-type gas dominates the northern margin of the Qaidam Basin, oil-type gas is mostly distributed in the Lenghu no. 3 field, and mixed gas is mainly developed in the Dongping and Mabei fields. According to the maturity obtained from delta C-13(1) and heptane and isoheptane ratios, the petroleum charge period is studied in combination with burial history and hydrocarbon generation history, and the result is roughly well matched with the research of homogeneous temperatures of petroleum inclusions. Furthermore, the generation temperature of the major reservoired hydrocarbons calculated from C-7 light hydrocarbon compositions ranges from 125.0 to 135.9 degrees C, suggesting that a major petroleum charge event may occur primarily during the Shangganchaigou period (N-1) in most fields. The deep paleo uplifts adjacent to the hydrocarbon-generating depressions at the margin of the basin and uplift zone in the inner basin are estimated as favorable areas for further exploration in the northern margin of the Qaidam Basin.
关键词	NATURAL-GAS ISOTOPE-RATIO SOURCE ROCKS TARIM BASIN CRUDE OILS CARBON PETROLEUM ORIGIN GENERATION FIELD
语种	英语
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000749695800031
来源期刊	ACS OMEGA
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/254173
作者单位	[Chen, Kefei; Liu, Shaolin] Minist Emergency Management China, Natl Inst Nat Hazards, Beijing 100085, Peoples R China; [Chen, Kefei; Zhou, Shixin; Li, Jing] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China; [Zhang, Chen] Minist Nat Resources, Strateg Res Ctr Oil & Gas Resources, Beijing 100034, Peoples R China
推荐引用方式 GB/T 7714	Chen, Kefei,Zhang, Chen,Zhou, Shixin,et al. Light Hydrocarbon (C-5-C-7) Geochemistry in the Northern Margin of the Qaidam Basin, Northeastern Tibetan Plateau: Gas Mixing and Hydrocarbon Charge History[J]. 中国科学院西北生态环境资源研究院,2021,6(48).
APA	Chen, Kefei,Zhang, Chen,Zhou, Shixin,Li, Jing,&Liu, Shaolin.(2021).Light Hydrocarbon (C-5-C-7) Geochemistry in the Northern Margin of the Qaidam Basin, Northeastern Tibetan Plateau: Gas Mixing and Hydrocarbon Charge History.ACS OMEGA,6(48).
MLA	Chen, Kefei,et al."Light Hydrocarbon (C-5-C-7) Geochemistry in the Northern Margin of the Qaidam Basin, Northeastern Tibetan Plateau: Gas Mixing and Hydrocarbon Charge History".ACS OMEGA 6.48(2021).