Inderscience Publishers

A comparative study of the characteristics of coalbed methane reservoirs in the Zhina region, Guizhou Province and the Southern Qinshui Basin, Shanxi Province, China

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In order to explore the coalbed methane recovery potential of the Zhina region in the Southwest China, this paper compared the physical properties of coal reservoirs in the Zhina region and the successfully developed Southern Qinshui Basin. The results show that the pore structures of the coal samples in the two areas are dominated by adsorption pores, which is favourable for the accumulation of CBM. However, coal reservoir in the tectonically stable Southern Qinshui Basin has better homogeneity, while coal reservoir in the tectonic-intense Zhina region has higher heterogeneity. In addition, coal in the Southern Qinshui Basin which is mainly dominated by fresh-water swamp and forests swamp facies has high vitrinite contents, and better adsorption capacities. Moreover, coal reservoir affected from the whole-region magmatic metamorphism in the Southern Qinshui Basin has better physical property and homogeneity than coal reservoir in the Zhina region that only regionally affected by magma metamorphism.

Keywords: adsorption capacity, seepage capacity, high rank coal, coal reservoir, China

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