The dimensionless IPR curve model appears to pro- vide a cost-effective way of predicting horizontal gas well deliverability.

Then from the expression of gas well deliverability in pseudo-steady state flow, there can have the expression of gas PI with and without high speed non-Darcy percolation.

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.