The Pore Structure Characteristic about the Sapropelic Coal
详细信息
- 责任者：Tang Shuheng (College of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Jingping
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(2)
- 关键词：腐泥煤 ; sapropelite ; 孔隙结构 ; pore structure
- 页码：p.247-251
- 图表：illus., 18 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Mercury injection and low temperature liquid nitrogen adsorption experiments were carried out to examine pore structures of the sapropelic coal in this paper.The results of mercury injection demonstrated the pore structure of sapropelic coal with different maturity and revealed the pore change regulation with maturity.Micropore is dominant during the stage before anthracite,while macropore and mesopore are dominant during the peranthracite stage.Compared to the humic coal of the same maturity,the sapropel ic coal has relatively lower porosity and smaller pore size.Furthermore,it is found that micropore with diameter of 1.5nm and 3.6nm are the most dominant.Adsorption hysteresis loop demonstrates the morphological diversity of the micropore,which mainly dominated by airtight pore with one end closed,ink-bottle pore,parallel plate slit pore and inclined slit pore.These findings have great significance on the understanding of physical property of the shale reservoir that is also mainly composed of sapropelic organic matter.
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