#TITLE_ALTERNATIVE#

• Main Author: MAYDIKA ASLAM (NIM : 12211005), BILLAL
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26106
• Institution: Institut Teknologi Bandung

CO2 Flooding projects are respectively proven and potential EOR methods. However conventional CO2 EOR methods have suffered from limited recovery efficiency due to gravity segregation, gas override, viscous fingering and channeling through high permeability streaks. Numerous theoretical and experimental studies as well as field applications have indicated that foaming of CO2 reduces its mobility, thereby helping to control the above negative effects. Foaming also increase microscopic displacement efficiency of CO2-EOR due to interfacial tension reduction by the presence of surfactant. <br /> <br /> The objective of this study is to compare the recovery efficiency of foam methods using co-injection and surfactant alternating CO2 gas (SAG) to conventional CO2 flooding in field-scale simulation. Local equilibrium (LE) foam model is used as incorporated in CMG-STARSTM simulator. Immiscible injection method is preferred due to high minimum miscibility pressure and fracture pressure limitation of the selected reservoir. Effect of injection rate to recovery factor for each method is also studied. This study also recommend the most suitable injection pattern. <br /> <br /> Simulation result gives higher total displacement efficiency and recovery factor incremental for foam method. This can be observed by the reduction of mobility ratio and IFT and increment of capillary number. Recovery factor for each method increase corresponding to injection rate up until certain values. For field T reservoir condition, simulation result indicate that coinjection method is better than SAG method. Recommended injection pattern for field T is peripheral pattern since it gives recovery factor increment up to 2.2% only by altering insignificant producer wells into injector wells.