Coal Geochemistry of
详细信息
- 责任者：Zhang Gongcheng (Research Center ; CNOOC ; Beijing 100027 ; China) ; Li Zengxue
- 刊名：Natural Gas Geoscience
- 出版年：2010
- 卷期：21(5)
- 关键词：煤 ; coal ; 元素地球化学 ; elements geochemistry ; 琼东南盆地 ; Qiongdongnan Basin
- 页码：p.693-699
- 图表：3 illus., 1 table, 17 refs.
- 分类号：1004
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
The coal bed of Qiongdongnan Basin distributes mainly in Yacheng Formation of lower Oligocene. Ash contents of coal samples are 13.59%~58.33%, and of carbonaceous mudstone samples are 56.08%~81.33%. Minerals of the coal samples consist of clay, sulfides (pyrite) and quartz. Total sulfur contents of coal samples are 1.07%~6.39% and most of the samples are high-sulfur coal. The characteristics of coke button are adhesive, less adhesive and no molten coherence. Maximum vitrinite reflectance of the coal samples varies 1.04%~1.23% with the average value of 1.14%, indicating that the coal with relative high metamorphic stage between metabituminous and medium volatile bituminous coal, was bituminous of moderate metamorphic stage. The coal at the second coalification jump was good for tremendous gas expelling out, which is in favor of forming the gas reservoir of coal-formed gas field under favorable conditions.