The characteristics and sources of natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin |
| |
| Authors: | Xianqing Li Guoyi Hu Jian Li Dujie Hou Peng Dong Zhihong Song Yunfeng Yang |
| |
| Institution: | [1]State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China [2]State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China [3]Langfang Branch of PetroChina Petroleum Exploration and Development Research Institute, Langfang 065007, China [4]Energy College, China University of Geosciences, Beijing 100083, China [5]School of Resource and Safety Engineering, China University of Mining and Technology, Beijing 100083, China |
| |
| Abstract: | The Central Gas Field is a famous large-sized gas field in the Ordos Basin of China. However, identification of main gas sources of the Ordovician reservoirs in this gas field remains puzzling. On the basis of a lot of geochemical data and geological research on natural gases, the characteristics and sources of natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin were studied. The results indicated that natural gases from Ordovician weathered crust reservoirs in the Central Gas Field in the Ordos Basin have similar chemical and isotopic com-positions to highly mature and over-mature dry gases. Both coal-derived gases and oil-type gases coexist in the Central Gas Field in the Ordos Basin. The former was derived mainly from Carboniferous-Permian coal measures and the latter from Lower Paleozoic marine carbonates. It is suggested that coal-derived gases occur in the eastern part of the Central Gas Field while oil-type gases may be pro-duced mainly in the northern, western and southern parts of the Central Gas Field in the Ordos Basin. |
| |
| Keywords: | natural gas Ordovician reservoir gas source Central Gas Field Ordos Basin |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
