The Temane gas field, in Mozambique’s Inhambane province, has been the supplier of natural gas to the South African and Mozambican market since 2004. Effective exploitation of these reserves requires proper characterization of the reservoir and accurate estimation of the volumes in place. The primary objective of this work is to perform a complete reservoir characterization of the Temane Gas Field based in the production history. The most used methods to estimate reserves are the Decline Curves Analysis, which include the type curves.

The type curves analyse were conducted with the aid of a rate transient analysis (RTA) software TOPAZE, an integrated computer platform for dynamic data analysis. Results of type curve analysis for each of the 5 selected wells provided information about the production potential of the Temane Gas Field based on reserves in-place (and remaining reserves), reservoir drainage area and wells performance indicators such as flow capacity, permeability and skin factor. We found that remaining reserves in the Temane Gas Field are estimated in 64% of the total reserves initially in place, and 82% of that reserves are in Gudja 9A reservoir. Wells located in reservoir Grudja 9A (T3, T12, and T15) have higher drainage area and higher performance than thoses of wells located in other reservoirs (T6 - Grudja 9B, and T9 - Grudja 9East). Further characterization studies of the Temane Gas Field are suggested to validate our results by applying the multi-well method.

Keywords: Temane gas field, reservoir characterization, production data analysis, Blasingame decline type curves, Productivity Index method.