中文摘要：

页岩储层的温度、压力高于气体的临界温度和临界压力，气体在页岩上的吸附属于超临界吸附。针对常规吸附模型（R-L、LRC、E-L、E-F）计算得到的绝对吸附量，不能更精确的表征等温吸附实验得到的过剩吸附量问题，引入过剩吸附量对常规多组分吸附模型进行修正。采用非线性拟合的方法得到拟合参数，利用相对误差分析常规吸附模型和超临界吸附模型的拟合效果，研究超临界吸附模型描述页岩气吸附规律的适用性。研究结果表明：各个修正后的吸附模型拟合效果均优于修正前。修正的R-L吸附模型和修正的E-L吸附模型能较好用于描述两组分的超临界吸附特征；修正的E-L吸附模型可以更好地描述页岩气的超临界吸附特征。此次研究为准确、快速预测页岩气藏超临界吸附特征提供了重要的参考。

英文摘要：

Since temperature and pressure of shale reservoir are higher than gas critical value, it belongs to supercritical adsorp- tion. Due to the absolute absorption amount calculated by conventional adsorption model R-L, LRC, E-L and E-F can＇ t accurate- ly represent excess adsorption by isothermal adsorption test, excess adsorption can revise conventional multi-component adsorption model. This paper takes nonlinear fitting method to calculate fitting parameters, uses relative error to analyze fitting results of con- ventional and supercritical adsorption model, and adopts supercritical adsorption model to describe the adaptability of shale gas ad- sorption rule. The result shows that every fitting result of revised adsorption models is superior to conventional adsorption models, in addition, revised R-L and E-L adsorption models can better describe their supereritical adsorption characteristics, and the E-L adsorption model can better describe that of shale gas reservoir. This research can provide important references for accurately and quickly predicting supercritieal adsorption characteristics of shale gas reservoir.