不应把直接从二项式产能方程或指数式产能方程或经验产能方程得到的绝对无阻流量q作为评价气井产能的参数，应采用消除地层损害后的绝对无阻流量q′AOF作为评价气井产能的参数；校正后的绝对无阻流量与地层损害表皮系数、地层压力、厚度、渗透率、气体粘度、体积系数等有关。对于校正后的绝对无阻流量的计算，在利用压力法和压力平方法时有所不同。 The absolute unobstructed flow q derived directly from the binomial or exponential production equation or the empirical capacity equation should not be used as a parameter to evaluate gas well productivity. The absolute unobstructed q’AOF after formation damage should be used as a measure of well productivity Parameters; The corrected absolute unobstructed flow rate is related to the formation damage, such as epidermal coefficient, formation pressure, thickness, permeability, gas viscosity and volume factor. For the calculation of the corrected absolute unobstructed flow rate, there are differences between the pressure method and the pressure leveling method.