Coal Reservoir Property Differences Analysis of Different Macrolithotype in Liulin Mining Area

Abstract:

This paper focused on the influences of different coal macrolithotypes on the coal reservoir properties, using a variety of testing methods studied the connection between macro-lithotype of coal and properties. When coal lithotypes changing from dull coal, bright coal, semibright coal to semidull coal, the adsorption pores change from enclosed types to open, adsorption capacities improved in turn, which is favorable to adsorption, desorption and diffusion of coalbed methane. Seepage pores of bright coal are the most developed, semidull coal and semibright coal less, dull coal the least. The permeability of coal has a positive correlation between microfissure density and large pore content. Different macrolithotype of the same coal seam changes with the permeability could be divided into three stages, including fractures decrease rapidly stage, fractures decrease slowly stage and fractures tend to be closed stage.

• Periodical: Advanced Materials Research (Volumes 915-916)
• Pages: 1108-1112
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.915-916.1108
• Online since: April 2014
• Authors: Ling Li*, Da Zhen Tang, Hao Xu, Yao Chen, Ting Xu Yu
• Keywords: Adsorption, Macrolithotype, Pore, Reservoir Properties, Seepage

References

[1] R.M. Bustin: Importance of fabric and composition on the stress sensitivity of permeability in some coals, northern Sydney basin: Relevance to coalbed methane exploitation. AAPG Bulletin, (1997) 81-11, 1894-(1908).

DOI: 10.1306/3b05c65e-172a-11d7-8645000102c1865d

[2] Dazhen Tang, Yong Qin and Aimei Hu: Advances and tendencies in geologic researches on coalbed methane. Experimental petroleum geology, (2003)25-6, 644-647(In Chinese).

[3] L.G. Tang, R.P. Gupta, C.D. Sheng, et al: A mechanistic approach to characterize coal heterogeneity in predicting high-temperature volatile matter yields. Energy & fuels, (2004)18-6, 1716-1722.

DOI: 10.1021/ef049878s

[4] Yanbin Yao, Dameng Liu, Dazhen Tang, et al: A comprehensive model for evaluating coalbed methane reservoirs in China. Acta Geologica Sinica‐English Edition, (2008)82-6, 1253-1270.

DOI: 10.1111/j.1755-6724.2008.tb00727.x

[5] J. H. de Boer. in: The shape of capillaries, edited by Everett D H, Stone F S, ed /The structure and properties of porous materials, London: Butterworth(1958).

[6] N.R. Khalili, M. Pan, G. Sandí: Determination of fractal dimension of solid carbons from gas and liquid phase adsorption isotherms. Carbon(2000)38, 573-588.

DOI: 10.1016/s0008-6223(99)00143-8

[7] Yanbing YAO，Dameng LIU，Dazhen TANG，et al: Fractal characterization of seepage-pores of coals from China: an investigation on permeability of coal. Computer & Geoscience, (2009)35-6, 1159-1166.

DOI: 10.1016/j.cageo.2008.09.005

[8] C. Laxminarayana, P.J. Crosdale: Role of coal type and rank on methane sorption characteristics of Bowen Basin, Australia coals. International Journal of Coal Geology, (1999), 309-325.

DOI: 10.1016/s0166-5162(99)00005-1

[9] P.D. Gamson, B. B. Beamish, D.P. Johnson: Coal microstructure and micropermeability and their effects on natural gas recovery. Fuel, (1993)72, 87-99.

DOI: 10.1016/0016-2361(93)90381-b