The Calculation of Minimum Miscibility Pressure (MMP) by PVTi Software through Different Scenarios of CO2 Injection

Abstract

Due to the increasing demand for oil and gas resources in recent years, enterprises worldwide have been experimenting with innovative technologies to improve oil recovery. Enhanced Oil Recovery (EOR) is the name for these techniques. EOR refers to any method that aids in the more recovery of oil. Due to the economic and environmental benefits, gas injection is recognized as a widely used EOR method around the world.

Due to a variety of factors, CO₂ injection has become more popular worldwide. To begin with, CO₂ is a component that is readily available worldwide, making it more cost-effective than other gas components. Second, it is classified as a greenhouse gas that contributes to a variety of environmental issues; hence, CO₂ injection will remove it from the atmosphere.

In CO₂ injection, if heavier gas components, particularly propane, butane, and even hydrogen sulfide as the impurity are added to CO₂, the miscibility pressure will remarkably decline. In pure CO₂ injection, the lighter the reservoir oil, the lower the miscibility pressure.

This project focused on gas injection. PVTi software was used to compute the miscibility pressure for various CO₂ and hydrocarbon gas components: methane, ethane, propane, and butane. Furthermore, since the globe moves toward clean energy and the elimination of CO2, the project's main focus is on CO₂ injection.