Constraining the hydrocarbon expulsion history of the coals in Qinshui Basin, North China, from the analysis of fluid inclusions |
| |
| Authors: | Wei Li Zhihuan Zhang Yongcai Yang Liguo Han Minghua Shao |
| |
| Institution: | aKey Laboratory for Petroleum Formation Mechanisms of Chinese Ministry of Education, China University of Petroleum, Changping, Beijing 102249, China;bGeological Scientific Research Institute, Shengli Oilfield, Dongying, 257001, China |
| |
| Abstract: | From the comprehensive study on the homogenization temperatures and the occurrence of fluid inclusions in the framework minerals of the strata between or above the Carboniferous–Permian coals in the Qinshui basin, Shanxi, three stages are predicted of hydrocarbon expulsion from the coals. Combined with the known history of basin evolution, it is deduced that the expulsion of hydrocarbons happened during the J1 (210–180 Ma), the early K1 (150–130 Ma) and K2 E1 (110–60 Ma). In the early stage, the coals produced and discharged coal-generated oils. The average GOI value of four sandstone samples is relatively high, as they have been exposed to high paleo-oil saturation in the strata between or above the coals. The biomarker compositions of oil-bearing fluid inclusions are similar to those of extracts from the coals, and so it is concluded that those oils were derived from the same family of the coals. |
| |
| Keywords: | Qinshui basin Coalbed gas Fluid inclusions Biomarkers |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
