The main factors of influencing coal-bed gas production are permeability, thickness, and gas-bearing volume of the coal-bed.

影响煤层气产量的主要因素是煤层渗透率、煤层厚度及含气量。

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But it will fail to recognize the gas bearing bed buried deeper by the two methods as its porosity log feature is not obvious, especially when density porosity is lower than neutron porosity.

但是，对埋藏较深的气层而言，由于其孔隙度曲线特征并不明显，故用常规方法识别十分困难，特别是当密度孔隙低于中子孔隙度时，上述两方法识别气层均失败。

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With gas potential and gas productivity the influence of gas-bearing volume and permeability on production of coal-bed gas Wells will be reflected completely.

用产气潜能与产气能力将更全面地反映含气量及渗透率对煤层气井产量的影响。

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