According to limitation of conventional deliverability testing method applied in gas reservoir of low permeability,a new,reduced well testing method for deliverability test is put forward.

Based on the filtration theory, the deliverability test theory and model are discussed and the relationship between coefficient of the binomial deliverability equation and the penetration rate, depth of pay zones and skin factor are analyzed.

In the lights of the development without deliverability test in gas field, this paper comes up with a kind of new method, which can compute coefficients of deliverability equation for gas wells,on the basis of on the data of stable production and well-controlled reserves.