#TITLE_ALTERNATIVE#

• Main Author: RAMADHANI (NIM : 12214015), NADIA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29483
• Institution: Institut Teknologi Bandung

One of the most common of Enhanced Oil Recovery (EOR) is the CO2 injection. The use of CO2 gas is effective in EOR due to the component of CO2 can cause oil swelling that will increase the oil saturation and oil relative permeability in reservoir. The condition of CO2 injection is miscible that can solve the interfacial tension problem well. Nevertheles, the oil and gas field in Indonesia is an old field with very low pressure and it’s difficult to achieve the miscible condition. The miscible condition are achieved when the reservoir pressure is greater than the Minimum Miscibility Pressure (MMP). By inject the microbubble CO2 which have smaller bubble can achieve the miscible condition without meet these conditions. <br /> <br /> <br /> <br /> This study discusses about the mechanism of microbubble CO2 injection by using huff and puff method, and also flooding method. The mechanism of microbubble CO2 injection is reviewed by altering of PVT parameters referring to reference data from previous laboratory studies (Xue et al, 2014). By matching the graph of CO2 saturation vs Pore Volume of CO2 injection and the ratio of decrease from CO2 vs time, the simulation show that the parachor and acentric factor parameters affect the forming of microbubble. That simulation results are applied to radial model for huff and puff method. Nevertheless, the CO2 injection of 0.0118 PV which lasts for 30 days of injection is very small with normal bubble saturation is 1.8% larger than microbubble saturation. Its not show the effectiveness of microbubble compared to normal bubble. Therefore, the mechanism of microbubble CO2 injection is observed at flooding method by changing the reservoir parameter, that are permeability, oil API gravity, and oil viscosity. By using this method, the microbubble injection is 7% more effective than normal bubble in 0.4 PV injection. Based on the sensitivity studies, microbubble injection will be optimally applied at light oil reservoir with high oil API gravity (>300API) and low oil viscosity (<10 cp), and also at good permeability. The oil recovery from the result of sensitivity studies by using microbubble is 10% of greater than the oil recovery by using normal bubble.