Journal of Petroleum & Environmental Biotechnology

Comparative investigation of miscible flue-gas injection in oil reservoirs and miscible condition evaluation

Webinar on Global Oil and Gas Expo

November 23, 2021 | Webinar

Ali Safaei

Shiraz University, Shiraz, Iran

Scientific Tracks Abstracts: J Pet Environ Biotechnol

Abstract:

Today, with the reduction of the natural production potential of oil and gas reservoirs, the need to use enhanced oil recovery methods is felt more than ever. Among the EOR, miscible gas injection is known as one of the most effective and efficient methods. However, one of the main concerns in this process is the source of injected gas. The best injectable gas is the cheapest and most effective gas in terms of improving oil production. On the other hand, the source of injection gas supply must have a minimum distance to the injection well. One of the sources of injected gas that has recently been considered is flue gas from various industries, like flare gases, power plants, cement factory, and petrochemical and refineries. The most important advantages of using the flue gas are the significant amount of carbon dioxide and nitrogen in it, low price, availability, and reduction of greenhouse gases in the environment. In this paper, the miscibility conditions for the mentioned flue gases are compared using simulations to determine the minimum miscibility pressure or MMP. For phase behavior simulation, the Peng-Robinson EOS has been used. Also, the pressure at which the amount of interfacial tension (IFT) between the surfaces tends to be zero is considered the minimum miscibility pressure. The simulation results show that among the mentioned flue gases, flare gas has the lowest minimum miscibility pressure, this shows that flare gas is one of the best choices for injection. Among other gases, the lowest minimum miscibility pressures are related to refinery, cement factory and power plant (from low to high), respectively.

Biography :

Ali Safaei is a Ph.D. candidate of petroleum engineering at Shiraz University, Shiraz, Iran, and a researcher in gas miscible injection (modeling and experimental) and PVT investigations (modeling and experimental).