对水平气井产能的准确预测有助于经济有效地开发气田。为了得到符合实际的水平气井产能公 式，在将气体流动过程视为储层渗流和井筒流动的基础上，考虑井筒附近非均匀污染和井筒压降对水平 气井产能的影响，建立了新的水平气井半解析产能模型。该文利用新建的模型实例计算水平气井的产量， 并与均匀污染下（不考虑井筒压降）的产量进行对比，同时分析井筒压降在不同渗透率条件下对水平气井 产能的影响，以及非均匀污染对产能的影响，为进一步完善实际水平气井和多分支气井的产能分析提供 了理论依据。

Forecasting the deliverability of horizontal well accurately plays an important part in economical and effective exploitation of oil and gas field. When we use horizontal well to exploit oil and gas field, the flow processing includes reservoir flow and wellbore flow. Taking both non-uniform damage around wellbore and pressure drop along the wellbore into account, we establish a semi-analytic model to estimate the deliverability of horizontal gas well. Then use this new model to calculate the production of a horizontal gas well, compare with the production under uniform damage, and respectively analyze the effect of pressure drop along the wellbore under different permeability and non-uniform damage around wellbore on well deliverability. This new model can provide theoretical basis for the deliverability analysis for horizontal gas well and multilateral gas well.