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ABSTRACT
The development of sour reservoirs depends on the efficient control of gas production. Many gas processing techniques have been created over the years via study and practical application. These techniques include the safe storage of sulfur as well as the reinjection of gas into depleted or active light oil reservoirs to improve oil recovery by miscible flooding. The purpose of this research is to examine the use of gas to enhance oil recovery and the difficulties associated with the behavior of the various phases. The minimum miscibility pressure (MMP), which controls the interaction between the gas and oil phases, is a crucial quantity to consider when building a project for miscible gas flooding. The minimum pressure point (MMP) is the point at which the mixture of gas and reservoir fluid is fully miscible. There are several ways to calculate MMP. The most accurate results come from laboratory tests, but they take a lot of time and are sensitive to changes in the fluid sample quality. Conversely, Equation of State (EOS) finds it difficult to adequately characterize polar molecules such as H2S. Empirical correlations are used in this study to determine MMP since the main goal is to comprehend the overall pattern of how methane concentration affects MMP during the procedure.. The purpose of this study is to mechanistically understand how gas improves oil recovery through the creation of a gas injection model utilizing a compositional simulator. This model is used to evaluate how important factors like acid gas concentration, injection pressure, and injection rates affect the effectiveness of oil recovery. The MMP study's conclusions show that the process's MMP is significantly influenced by the amount of methane present. The process's MMP rises in tandem with the amount of methane in the injection gas. This study also shows that because to increased gas viscosity, a rise in acid gas concentration lowers the process's MMP. This prolongation of the plateau phase causes a postponed gas breakthrough, which in turn improves the process's overall recovery. Furthermore, it has been noted that these improvements in viscosity result in better volumetric sweep efficiency, which is an improvement over the majority of gas injection-based enhanced oil recovery (EOR) techniques.
