Contribution of abiotic methane polymerization of C2+hydrocarbons in highly mature natural gas reservoirs
文献类型：期刊论文
| 作者 | Li, Yun1,3 ; Jiang, Wenmin1,3; Liu, Wen1,2,3; Xiong, Yongqiang1,3; Peng, Ping'an1,3
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| 刊名 | ORGANIC GEOCHEMISTRY
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| 出版日期 | 2024-06-01 |
| 卷号 | 192页码:14 |
| 关键词 | Associate Editor Yanhua Shuai High mature natural gas Isotopic reversal Position-specific isotope Abiotic methane polymerization |
| ISSN号 | 0146-6380 |
| DOI | 10.1016/j.orggeochem.2024.104798 |
| 英文摘要 | The formation and evolution of thermogenic gases were investigated using a combination of intermolecular and intramolecular isotope analyses of 32 natural gas samples collected from the Sichuan and Tarim basins (China) and the Arkoma Basin (USA). Three evolution stages (I-III) were identified: In stage I, hydrocarbon gases are produced through thermal decomposition of organic matter, and kinetic isotope effects in C-C bond breakage control their isotopic distributions; In stage II, C2-C5 hydrocarbons crack with increasing thermal maturity, with their formation and decomposition tending toward thermodynamic equilibrium, and at the end of this stage, the intermolecular and intramolecular isotopic compositions of gaseous hydrocarbons are in thermodynamic equilibrium; A remarkable feature of stage III is the surface-catalyzed abiotic polymerization of methane, which provides a critical origin of C2+ hydrocarbons in this stages and leads to isotopic anomalies in C2+ hydrocarbons, including the reversal of 613C distributions of C1-C3 and the reverse evolution trend of SP value of propane (i.e., tending to be positive). The contribution of C2+ hydrocarbons from the abiotic polymerization of methane can be determined based on a two-end member model. C2+ hydrocarbons in the Changning shale gases are all generated from abiotic methane polymerization, and the contribution ratio in the Weiyuan shale gases is about 85 %, while, the contribution of C2+ hydrocarbons in dry gases from the Tarim Basin formed by this way is no more than 55 %. High methane abundance, high temperature, and abundant catalyst are beneficial to abiotic methane polymerization. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001266351200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78261]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Xiong, Yongqiang |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yun,Jiang, Wenmin,Liu, Wen,et al. Contribution of abiotic methane polymerization of C2+hydrocarbons in highly mature natural gas reservoirs[J]. ORGANIC GEOCHEMISTRY,2024,192:14. |
| APA | Li, Yun,Jiang, Wenmin,Liu, Wen,Xiong, Yongqiang,&Peng, Ping'an.(2024).Contribution of abiotic methane polymerization of C2+hydrocarbons in highly mature natural gas reservoirs.ORGANIC GEOCHEMISTRY,192,14. |
| MLA | Li, Yun,et al."Contribution of abiotic methane polymerization of C2+hydrocarbons in highly mature natural gas reservoirs".ORGANIC GEOCHEMISTRY 192(2024):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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