Regional Screening Level CO₂ EOR Study

The study involved analyzing oil pools in central Alberta to assess CO₂ miscible flood enhanced oil recovery (EOR) opportunities for a major pipeline company. A detailed database was developed to allow screening and ranking based on various criteria including:

• Theoretical and effective CO₂ storage capacity
• Remaining recoverable reserves, calculated recovery factor
• Predicted EOR oil recovery
• Production and injection data
• Pressure data including minimum miscibility pressure
• Porosity and permeability from core data (for reservoir parameters)

A ranking group was established to determine whether a pool falls within optimal conditions, near condition boundaries, or outside condition boundaries. These conditions include:

• Oil gravity of 27–42° API
• In-situ viscosity of 0.4–6 cP
• Temperature of 31–127°C
• Current Pressure > Minimum Miscibility Pressure (MMP)
• Active injection in the pool

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