Characteristics of Porosity and Permeability and Their Geological Control of Permo-Carboniferous Coals in
详细信息
- 责任者：Liu Dameng (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Yao Yanbin
- 刊名：Geoscience
- 出版年：2010
- 卷期：24(6)
- 关键词：煤系 ; coal measures ; 孔隙度 ; porosity ; 渗透率 ; permeability ; 华北地区 ; North China
- 页码：p.1198-1203
- 图表：illus., 14 refs.
- 分类号：1004
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
Based on the coal proximate,coal maceral composition and low-temperature N2 adsorption analyses, microfracture analysis by fluorescence microscope, helium porosity and air permeability analyses, this paper investigated the geological control of porosity and permeability of coals in Hedong, Weibei, Yangquan, Jincheng, Datong and Huainan-Huaibei coalfields. The results showed that coal porosity ranged from 2% to 10%, and strongly related to the coalification degree. The porosity reached a minimum value when Ro, r was about 1.2%. The filling and mineralization of pores by minerals were proven to decrease the coal porosity. Coal permeability is commonly less than 5×10-3 μm2, and shows an exponential increment relationship with porosity. The anthracite porosity is commonly less than 6%, which dominated by the micro-and meso-pores porosity.
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