The transient wellbore simulator has been applied to evaluate the deliverability curve on a hypothetical Well-X. The aim of the study is to propose a new procedure in producing a deliverability curve of production well. The procedure of obtaining deliverability curve is carried out by giving the mass flow rate input at the wellhead to the software during the specified time length. The continuous calculated wellhead pressures then are plotted against the corresponding mass flow rates. In this study, the various permeability thickness (kh) values are evaluated to study their effects on deliverability curves. The results showed that for lower kh values, the shape of deliverability curves tend to be flat and do not show the maximum values for flow rate. On the other hand, the higher kh values produce larger mass flow rates for the same wellhead pressures and show maximum values for mass flow rates at the specific wellhead pressures.

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