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Light Hydrocarbon (C-5-C-7) Geochemistry in the Northern Margin of the Qaidam Basin, Northeastern Tibetan Plateau: Gas Mixing and Hydrocarbon Charge History

文献类型：期刊论文

作者Chen, Kefei1,2; Zhang, Chen3; Zhou, Shixin2; Li, Jing2; Liu, Shaolin1
刊名ACS OMEGA
出版日期2021-12-07
卷号6期号:48页码:32709-32721
ISSN号2470-1343
DOI10.1021/acsomega.1c04449
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.
WOS关键词NATURAL-GAS ; ISOTOPE-RATIO ; SOURCE ROCKS ; TARIM BASIN ; CRUDE OILS ; CARBON ; PETROLEUM ; ORIGIN ; GENERATION ; FIELD
资助项目National Institute of Natural Hazards, Ministry of Emergency Management of China[ZDJ2019-18] ; KeyLaboratory of Petroleum Resources Research, Gansu Province[SZDKFJJ20211001] ; National Nature Science Foundation of China[41872147] ; National Nature Science Foundation of China[42172178]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000749695800031
出版者AMER CHEMICAL SOC
资助机构National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; KeyLaboratory of Petroleum Resources Research, Gansu Province ; National Nature Science Foundation of China ; National Nature Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/104901]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Zhou, Shixin; Liu, Shaolin
作者单位1.Minist Emergency Management China, Natl Inst Nat Hazards, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China
3.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]. ACS OMEGA,2021,6(48):32709-32721.
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),32709-32721.
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):32709-32721.

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来源：地质与地球物理研究所

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