Foamy oil is commonly observed phenomenon during cold primary production of heavy oil reservoirs. Along with the pressure depletion, a type of anomalous flow of oil and gas phases appears when pressure is lower than the thermodynamic saturation pressure. Foamy oil is believed to bring positive effects to heavy oil recovery and well productivity by promoting favored fluid properties and oil swelling. The proposed study focuses on the description of the complex phase behavior of foamy oil systems to examine equilibrium versus non-equilibrium behaviour at different depressurization rates.
This project will support efforts to reduce greenhouse gas emissions resulting from coal-fired power generation. In this case, the greenhouse gas of interest is carbon dioxide which is captured at SaskPowers Boundary Dam Power Station near Estevan, Saskatchewan. This carbon dioxide is transported to the nearby Aquistore site, where it is injected into porous sandstone formations at depths greater than 3000 m.
Western Canada has vast heavy oil deposits in many thin heavy oil reservoirs with less than 10-m main pay zones. The cold heavy oil production with sand (CHOPS) is the primary production process in the heavy oil reservoirs. However, a typical CHOPS process can recover only 5?15% of the initial oil-in-place. As a secondary heavy oil recovery method, waterflooding has had a limited success in the past.
This project is aimed for an accurate and highly convenient methodology to visually investigate the multiphase flow behavior, foamy oil stability and solvent mass transfer in solvent injection processes.
The continuing rise in demand, the decline in conventional domestic production, and the belated development of alternatives to petroleum combine to increase the importance of seeking new resources and methods for enhanced oil recovery (EOR). The amount, cost, and timing of the EOR contribution are highly uncertain. Additionally, due to the current economical constraints that oil industry is experiencing, the search for a cost-effective recovery method is even more significant.
This project is to perform systematic studies to better understand key recovery mechanisms of mixture solvent CSI process and provide fundamental parameters for field-scaled prediction. For mass transfer, a methodology of measuring diffusion coefficients for multiple components simultaneously dissolving into heavy oil systems under bulk volume and porous medium conditions will be established. For foamy oil flow, its properties of non-equilibrium will be investigated by PVT measurement and depletion tests, respectively.
Canada possesses vast resources of heavy oil, which is oil that is too thick to flow through porous sandstone reservoirs and into production wells at economic rates when conventional operating practices are used. Since the mid 1980âs, heavy oil operators have demonstrated their ability to increase heavy oil production rates by encouraging the creation of porous and permeable zones (âwormholesâ) within their reservoirs by allowing sand grains to detach from the reservoir rock and flow into the well (along with the oil).
Western Canada has vast heavy oil deposits in many thin heavy oil reservoirs with less than 10-m main pay zones. The cold heavy oil production with sand (CHOPS) is the primary production process for the heavy oil reservoirs. However, a typical CHOPS process can recover only 5?15% of the initial oil-in-place and waterflooding has had a limited success.
With the current challenges with depleted reservoirs and problems associated with heavy oil production, the implementation of the most cost-effective and feasible enhanced oil recovery method is inevitable. There are a wide range of EOR methods available and developed, which are in most cases expensive and complicated to carry out. Therefore, an extensive preliminary screening procedure is necessary before conducting a field-scale EOR method.