Geological process of Late Paleozoic shale gas generation in the eastern Ordos Basin, China: Revelations from geochemistry and basin modeling
文献类型：期刊论文
| 作者 | Yu, Kun2,3; Ju, Yiwen2; Qi, Yu1; Huang, Cheng2; Zhu, Hongjian2 |
| 刊名 | INTERNATIONAL JOURNAL OF COAL GEOLOGY
 |
| 出版日期 | 2020-09-01 |
| 卷号 | 229页码:16 |
| 关键词 | Shale gas Geochemistry Maturity Hydrocarbon generation Ordos Basin |
| ISSN号 | 0166-5162 |
| DOI | 10.1016/j.coal.2020.103569 |
| 英文摘要 | During the Meso-Cenozoic, the eastern Ordos Basin (EOB) underwent a complex tectonothermal process influenced by the destruction of North China Craton, significantly affecting the thermal maturation of the Late Paleozoic source rocks. Tectonothermal modeling and maturation of coal-bearing shales were performed in the EOB to reveal the geological process of shale gas generation. Organic geochemical data for shales show that TOC values vary from 0.96 wt% to 21.36 wt% and R, values range from 1.56% to 2.47%, as well as that organic matter mainly consists of type III kerogen-indicating excellent potential, and sufficient maturity, for gas generation. Thermal modeling suggests that heat flow in the EOB significantly increased as a result of intense magmatic activities during the Yanshanian orogeny, with peak values of 108 and 128 mW/m(2) in the northern and southern regions, respectively. Consequently, great variations in maturation history are seen in different regions of the EOB, with the Taiyuan and Shanxi shales reaching the wet gas and dry gas stages, respectively, in the northern region and all shales reaching the dry gas stage in the southern region. Hydrocarbons were generated at 237 Ma and peaked around 162 Ma, whereas hydrocarbon expulsion began at 230 Ma and peaked at 131 Ma. Rapid subsidence in the Triassic brought the shales to the oil generation window and Early Cretaceous magmatic activities led to rapid maturation of shales, again reaching the gas generation stage. Accordingly, extremely high levels of thermal maturity are well documented in hydrocarbons' alkane composition and stable carbon isotope ratio. Gas geochemical data (delta C-13(1) vs. C-1/C2+3, delta C-13(1) vs. C2+) imply that that hydrocarbons are from highly mature thermogenic gas generated mainly from humus, and this offers great support for thermal maturation modeling. Regionally, coal-bearing shales have been steadily uplifted and eroded since the Late Cretaceous, causing partial destruction of gas reservoirs. The tectonothermal evolution and hydrocarbon generation of EOB were controlled primarily by magmatic thermal effects resulting from the westward subduction of the Pacific plate. |
| WOS关键词 | STABLE CARBON ISOTOPES ; COAL-BEARING STRATA ; BOHAI BAY BASIN ; NORTH CHINA ; THERMAL HISTORY ; LINXING AREA ; NATURAL-GAS ; HYDROCARBON GENERATION ; VITRINITE REFLECTANCE ; INTRUSIVE COMPLEX |
| 资助项目 | National Natural Science Foundation of China[41530315] ; National Natural Science Foundation of China[41872160] ; National Science and Technology Major Project of China[2016ZX05066003] ; National Science and Technology Major Project of China[2016ZX05066006] ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology)[2019-003] |
| WOS研究方向 | Energy & Fuels ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000573411900005 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) ; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education (China University of Mining and Technology) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98275]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Ju, Yiwen |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China 3.China Univ Min & Technol, Key Lab Coalbed Methane Resources & Reservoir For, Minist Educ, Xuzhou 221008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Kun,Ju, Yiwen,Qi, Yu,et al. Geological process of Late Paleozoic shale gas generation in the eastern Ordos Basin, China: Revelations from geochemistry and basin modeling[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2020,229:16. |
| APA | Yu, Kun,Ju, Yiwen,Qi, Yu,Huang, Cheng,&Zhu, Hongjian.(2020).Geological process of Late Paleozoic shale gas generation in the eastern Ordos Basin, China: Revelations from geochemistry and basin modeling.INTERNATIONAL JOURNAL OF COAL GEOLOGY,229,16. |
| MLA | Yu, Kun,et al."Geological process of Late Paleozoic shale gas generation in the eastern Ordos Basin, China: Revelations from geochemistry and basin modeling".INTERNATIONAL JOURNAL OF COAL GEOLOGY 229(2020):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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