Production data analysis for dual-porosity gas/liquid systems: A density-based approach

To summarize our work, we developed rate-transient analysis method for two types of reservoirs-naturally fractured gas reservoir and naturally fractured oil reservoirs-producing at arbitrary type of production scenario in boundary-dominated-flow stage. The proposed method can evaluate reserve in a convenient and accurate manner. Moreover, the method to predict production using the theory is also provided. An explicit equation correlating dimensionless production rate and dimensionless time is also developed for dual-porosity liquid system producing at constant bottomhole pressure in both early transient stage and boundary-dominated-flow stage.