#TITLE_ALTERNATIVE#

• Main Author: BURHANUDDIN AULIA ASY’ARI (NIM : 12212096), M.
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28819
• Institution: Institut Teknologi Bandung

Enhanced Oil Recovery (EOR) using CO2 injection are respectively proven and potential method. 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 surfactant alternating CO2 gas (SAG) to conventional CO2 flooding in 1D, 2D-areal, 2D-vertical field X model simulation, and also in laboratory experiment using long core and core flood apparatus. Local equilibrium (LE) foam model is used as incorporated in CMG-STARSTM simulator. Immiscible injection method is preferred due to high minimum miscibility pressure (MMP). <br /> <br /> Simulation result gives higher displacement efficiency, areal sweep efficiency, and vertical sweep efficiency for SAG method than continuous CO2 injection. This can be observed by the reduction of gas mobility, mobility ratio, IFT, and increment of capillary number. Core flood experiment also shows that SAG method has higher recovery factor than continuous CO2 injection. Beside that, the foam formation including its effect is observed in this laboratory experiment.