EGEE 520: Spring 2008

Instructor: Dr. Derek Elsworth

By:Sylvain-Didier Kouame

A Study of Fluid displacement in Porous Medium using Nitrogen/CO2 injection

Overview

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

I- Introduction

Fluid flow in porous Medium Enhanced Oil Recovery Hydrogeology

Figure 1: CO2 and Water Flow Through Porous

II- Background

Governing Equations:

Darcy’s Equation

Figure2: Darcy's experiment

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% CO20% N2

0% CO2

IV- Simulation (CMG)

Figure1: 3-D View Of Core SampleFigure1: Relative Permeability Curve

V- Results

VI- Parametric Study and Validation

A vertical sand column of length L = 120cm

Cross-sectional area A = 1 cm2

The difference between water levels at the inflow and the outflow reservoirs is Dh = 120 cm

The hydraulic conductivity K = 20 cm3/min

Parametric Study and Validation

- Injected Fluids .Water .Water Saturation 100% .Oil Saturation 0%

.Injection Rate 20 cm3/min

-Fluids Produced .Water .Produced Water 100% .Produced Oil 0% .Production Rate 20 cm3/min

Figure1: 3-D View Of Core Sample

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.