Abstract: Based on phase-state theory and flash calculation method for condensate oil/gas system, this paper presents the deliverability equations of oil and gas obeying Darcy's law, gas obeying non-Darcy's law, oil obeying Darcy's law, oil and gas obeying non-Darcy's law in condensate gas well according to flow characteristics of gas and retrograde condensed liquid in strata. In these equations, the phase state and composition changes are considered well and two-phase pseudo pressure function of steady state theory calculation is introduced. The case study shows that there exists a breakpoint in inflow performance curves when bottom pressure is at dew-point pressure, which is coincident with the characteristics of condensate gas well; in inflow performance prediction of gas condensate well, the deliverability equation of gas obeying non-Darcy's law while oil obeying Darcy's law should be adopted.

Key words: condensate gas well, phase state, steady state theory, percolation, non-Darcy flow