SIMULATION STUDY OF THE IMPACT OF MOBILITY RATIO ON MULTILAYERED RESERVOIR DURING WATERFLOODING PROCESS

• Main Author: MAT MISIAH, AHMAD FADHIL
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi PETRONAS 2011
• Subjects: T Technology (General)
• Online Access: http://utpedia.utp.edu.my/10429/1/2011%20-%20Simulation%20Study%20of%20the%20Mobility%20Ratio%20on%20Multilayered%20Reservoir%20during%20Waterflooding%20Proc.pdf; http://utpedia.utp.edu.my/10429/

Implementation of waterflooding technique in Waha reservoir requires the injection of water into the oil zone for oil displacement, due to the primary recovery mechanism used in the Waha reservoir. Previous study done concludes that there are two factors that highly affected the waterflooding performances, which are the mobility ratio and reservoir heterogeneity. Therefore, a numerical approach was used to study the effect of mobility ratio and reservoir heterogeneity in the waterflooding project with quarter of Five-Spot Injection Pattern. Eclipse simulator was used, in which the results was estimated using the combination of Buckley-Leverett and Dykstra-Parson method. Some theories involved were also discussed in this paper, such as Frontal Advance Equation, Fractional Flow Equation and relevant researches done by others. Generally, the mobility ratio more than 1 {M> 1) will achieve early breakthrough with less oil recovery, while mobility ratio less than I (M<1) will achieve late breakthrough with more oil recovery. Meanwhile, permeability is highly affecting waterflooding performances in reservoir heterogeneity factor, compared to porosity and thickness. High permeability formation enables the fluid to travel faster, and increase the mobility ratio of the displacement, while low permeability formation enables the fluid to travel slower, and decrease the mobility ratio of the displacement. The estimation based on simulated results indicate that the mobility ratio equal to 0.8 (M=O.S) will optimize .the waterflooding performances, given the permeability variation of 0.4