Decline Curve Analysis for Naturally Fractured Gas Reservoirs: A Study on the Applicability of “Pseudo-time” and “Material Balance Pseudo-time”

Robust techniques for analysis of production data of single<br>porosity gas reservoirs have been developed and widely used<br>for many years. These methods range from the traditional<br>Arp’s decline method to modern type-curve matching. The<br>more recent techniques are based on the use of pseudo-time<br>for linearization of gas-flow equations, and material balance<br>time to account for variable operating conditions.