Pore Structure Variation of the Coalbed Methane Reservoir caused by Igneous Intrusion in the Zijinshan Block of the Eastern Ordos Basin, North China.

By applying density functional theory (DFT) to analyze adsorption experiments, we determined the pore size distribution (PSD) curves and structural features of pores with effective diameters ranging from 0.3 to 1.5 nm were determined. With weakening of the influence of magmatic heat on coal samples, both (PV) and (SSA) generally exhibit an increasing trend.

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Integrated elemental and gas composition analyses revealed a decreasing trend in gaseous hydrocarbons (methane and ethane) as shown in Table .

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