On the basis of the measured isotherm data under different temperatures and the adsorption potential theory,theε-ωadsorption characteristic curve can be drawn and described by analyzing and treating the isotherm data,and a model for shale adsorptive gas is deduced.Based on this,a calculation model for shale adsorptive gas amount under a certain geological conditions and under the influence of temperature and pressure is established.The model is validated and analyzed by the measured isotherm data.The result shows that theε-ω adsorption characteristic curve of shale adsorptive gas is only one and independent of temperature, and the form of the adsorption characteristic curve is logarithmic.The accuracy of the predicted result by a calculation model is high. It can forecast the shale adsorption gas amount under different temperatures and pressures and obtain the adsorption isotherm of shale adsorbed gas.The calculation model for the amount of shale adsorbed gas is established under a certain geological conditions and the influence of temperature and pressure. It can be used to predict the trend chart of the shale adsorbed gas amount changing with depth.The temperature and pressure have the adverse effect on the shale adsorbed gas amount,and under a certain geological conditions,the influence of temperature and pressure on the shale adsorptive gas amount meets a competition relationship.When the burial depth of the shale formation is less than the burial depth of the maximum adsorbed capacity,the pressure has a major influence,otherwise,the temperature does.%根据实测的页岩等温吸附数据，以吸附势理论为基础，对等温吸附数据进行处理分析得到ε-ω吸附特性曲线及其数学表达式，推导出页岩吸附甲烷模型，在此基础上建立了地质条件下温度和压力共同影响的页岩吸附气量计算模型，并利用实测等温吸附数据进行了模型验证及应用分析。研究结果表明：页岩吸附气的ε-ω吸附特性曲线是唯一的且与温度无关，特性曲线的形态呈对数形态；文中推导吸附模型的预测结果精度较高，可预测不同温度和不同压力下页岩吸附气量，得到页岩吸附等温线；建立的地质条件下温度和压力共同影响页岩吸附气量计算模型，可预测页岩吸附气量随深度变化的趋势图；温度和压力对页岩吸附气量影响作用相反，在地质条件下的温度与压力对页岩吸附气量影响存在竞争关系，其中当页岩埋深小于页岩最大吸附容量对应埋深时，压力起到主要影响作用，反之温度起到主要影响作用。
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