Characteristics of fissures and pores of anthracite in Jincheng by SEM

被引：6

作者：

Li G. ^{[1
]}

Zhang H. ^{[1
]}

Song X. ^{[1
]}

机构：

[1] Institute of Geology, Xi'An Branch, China Coal Research Institute

来源：

Mining Science and Technology | 2010年 / 20卷 / 05期

关键词：

anthracite; coalbed methane; fissure; pore;

D O I：

10.1016/S1674-5264(09)60282-9

中图分类号：

学科分类号：

摘要：

Anthracite in Jincheng is a highly metamorphic coal and its system of fissures and pores is differentfrom that of low and medium ranked coal. In order to discover their characteristics, 69 samples were collected from 18 CBM wells in Zhengzhuang in Jincheng and their fissures and pores were observed by a Scanning Electron Microscope (SEM). To the naked eyes and by SEM, the pores in the Jincheng anthracite are seen to have abundant mold pores with isolated, shallow and poor connectivity (diameters between 1∼50 μm) and few plant tissue pores, gas pores, and solution pores. Most of the fissures are filled with clay minerals or closed; while open fissures are not often visible in the Jincheng coal (aperture between 3∼10 μm). These characteristics are determined by the high rank and high vitrinite content of the coal. The existence of too many mold pores and filled fissures does not allow the migration of methane, hence hydraulic fracture stimulation will be required and is an effective method of adding and connecting fissures to enhance CBM production. © 2010 China University of Mining and Technology.

引用

页码：789 / 793

页数：4

共 18 条

[1]

Stach E., MacKowsky M.T., Teichmuller M., Taylor G.H., Chandra D., Teichmüller R Stach's Textbook of Coal Petrology, (1975)

[2]

Hao Q., Study on the micropore modality characteristics of coal and origin, Journal of Coal Science & Engineering, 4, pp. 51-61, (1987)

[3]

Laubach S.E., Marrett R.A., Olson J.E., Scott A.R., Characteristics and origins of coal cleat: A review, International Journal of Coal Geology, 35, pp. 175-207, (1998)

[4]

Zhang S.X., Xiao H.Y., Micro pores and fissures in coal reservior, J Chin Electr Microsc Soc, 19, 4, pp. 531-532, (2000)

[5]

Zhang H., Study on the origin type of pore in coal, Journal of Coal Science & Engineering, 26, 1, pp. 40-44, (2001)

[6]

Zhang H., Wang X.G., Yuan Z.R., Hao Q., Genetic types of micro fractures in coal and its significance, Acta Petrologica et Mineralogica, 21, 3, pp. 278-284, (2002)

[7]

Zhang H., Li X.Y., Hao Q., He D.C., Zhang J., Study on Coal in China by Scan Electronic Microscope, (2003)

[8]

Zhang H., Li X.Y., The application of scan electronic microscope to coal petrology, J Chin Electr Microsc Soc, 23, 4, (2004)

[9]

Xoot B.B., Coal and Gas Burst, (1966)

[10]

Wu J., Study on the relationship between micropore characteristics of coal and Storage and migration of gas & oil, Science in China, 23, 1, pp. 77-84, (1993)

← 1 2 →