Iranian oil fields need more than 110 million cubic meters of natural gas to increase daily recovery. Due to the country's severe imbalance in natural gas, the supply of this gas by national oil and gas companies is facing a serious challenge. An alternative option is to use non-hydrocarbon gases such as nitrogen, carbon dioxide, and Flue gas (Combustion gas). Combustion gas is a more attractive option due to its low price and availability. In previous studies, the importance of replacing natural gas and its functional and economic aspects from the perspective of reservoir engineering and increasing the recovery factor were examined.
From a subsurface process perspective, the challenge of this gas for injection is the presence of high amounts of water vapor and moderate oxygen concentrations in some incomplete combustion processes, which cause corrosion and reduce the safety of the facility. Continuing previous research, the aim of this study is to design a power plant combustion gas purification unit to separate water vapor and define complete combustion processes for injection into the well. In this designed unit, raw flue gas will be converted into standard gas compatible with the reservoir and can be injected into the field through a precise engineering process. The main objective of this project is to design an optimal process unit for compression and purification and initial calculations of the transmission line. Also, different scenarios for implementing the process have been examined and compared with each other. Finally, the total cost of collecting, purifying, and transporting combustion gas has been calculated for forty discharges of 1, 4, 8, and 20 million cubic meters per day. This study is one of the first studies to document the basic design of standard combustion gas production that can be injected into the field. The design dimensions, the amount of electricity consumed by the facility, and the final cost of the process are presented in four different scales.