1. EGEE 520: Spring 2008 Instructor: Dr. Derek Elsworth By: Sylvain-Didier Kouame A Study of Fluid displacement in Porous Medium using Nitrogen/CO2 injection

2. Overview  I- Introduction  II- Background  III- Problem Statement  IV- Simulation  V- Results and Validation  VI- Parametric Study  VII-Conclusion

3. I- Introduction  Fluid flow in porous Medium  Enhanced Oil Recovery  Hydrogeology Figure 1: CO 2 and Water Flow Through Porous

4. II- Background Governing Equations: Darcy’s Equation Figure2: Darcy's experiment

5. III- Statement of the Problem Formulation: * Optimize fluid (oil) displacement in a porous space by injecting, CO2 which is miscible in oil and nitrogen immiscible in oil. - Rock Properties -Oil Properties - Injected Gases Miscible/Immiscible 100% N2 100% CO2 0% N2 0% CO2

6. IV- Simulation (CMG) Figure1: 3-D View Of Core Sample Figure1: Relative Permeability Curve

7. V- Results

8. VI- Parametric Study and Validation A vertical sand column of length L = 120cm Cross-sectional area A = 1 cm 2 The difference between water levels at the inflow and the outflow reservoirs is Dh = 120 cm The hydraulic conductivity K = 20 cm 3 /min

9. Parametric Study and Validation - Injected Fluids.Water.Water Saturation 100%.Oil Saturation 0%.Injection Rate 20 cm 3 /min -Fluids Produced.Water.Produced Water 100%.Produced Oil 0%.Production Rate 20 cm 3 /min Figure1: 3-D View Of Core Sample

10. VII- Conclusions -Nitrogen and Carbon could be used simultaneously to improve fluid displacement. - Optimum recovery level, only a very small amount of the second gas should be added to the initial gas which should also is the main gas injected.