Evaluating the deliverability of underground gas storage in depleted reservoir is presented in this work. Production data from a depleted oil reservoir in an oilfield located in the Niger Delta was obtained for analysis. Performance history at the end of eight-year running was obtained from the above data which was used to generate the plot of Log(Pr2 – Pwf2) versus Log Q to get the slope. With these figures in place, the Microsoft Visual Basic Computer Program was written and used to generate a table, and a plot of deliverabilities at different well flowing pressures was obtained.
