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煤层气可采性是煤层气地质评价选区研究的核心内容，是煤层气开采的决定因素、根据煤层气产出机理定义了煤层气的可采性，用实际生产数据和数值模拟结果分析了渗透率、相对渗透率、等温吸附曲线形态和含气饱和度等地质参数对煤层气可采性的影响。分析结果表明，这一系列地质参数对煤层气可采性影响显著，应是煤层气可采性研究和综合评价的重点。

PRINCIPAL GEOLOGIC PARAMETERS CONTROLLING COALBED METHANE RECOVERABILITY

oalbed methane recoverability is one of the major research aspects of coalbed methane geologic evaluation and target area selection.Based on coalbed methane recovery mechanism,coalbed methane recoverability is defined.The effects of permeability,relative permeability,isothermal adsorption curve shape and gas saturation etc.on coalbed mathane recoverability are analysed with actual production data and by numericalsimulation technigue.The Analysis result shows that each of these parameters has significant effect on coalbedmethane recoverability.So each parameter should be a research emphasis of coalbed methane recoverability andcomprehensive evaluation.