Available online at: http://proceeding.rsfpress.com/index.php/ic-smart/index Proceeding on International Conference of Science Management Art Research Technology (IC-SMART) Volume 1 Number 1 (2020): 33-43 Research Synergy Foundation DOI: https://doi.org/10.31098/ic-smart.v1i1.24 RSF Press The Potential of CO2 Injection on Enhanced Oil Recovery Method for Oil Fields in Indonesia Rini Setiati, Gilbert Soenarjo, Ixora Karundeng, Vicky Dimas Widoseno Petroleum Engineering Department, Faculty of Earth and Energy Technology, Trisakti University, Jakarta, Indonesia Email address rinisetiati@trisakti.ac.id; Email address gilbertsunaryo@gmail.com; Email address ikarundeng@gmail.com; Email address vickydimasw@ymail.com Abstract Indonesia is one of the countries that have large oil and gas reserves. So far, primary and secondary oil recovery can only produce around 20%-40% of reservoir reserves in Indonesia, so there is a large amount of oil potentially remaining in reservoirs. One of the Enhanced Oil Recovery (EOR) methods is CO2 injection because there are many sources of CO2 gas in oil fields in Indonesia. The purpose of this study was to determine the performance of the CO2 injection mechanism method, which can make hydrocarbon fluid miscibility and increase the recovery factor of oil wells. The methodology in this study is a literature review that discusses oil field data in Indonesia. Screening criteria use several parameters, including reservoir pressure and minimum miscibility pressure. Field data is then calculated and predicted using simulations. From the results of the simulation, calculations carried out there are six oil field areas that have the potential for CO2 injection in an effort to improve oil recovery, namely in the East Kalimantan, West Java, and South Sumatra areas, with recovery factors ranging from 50% - 90% of the original oil in place (OOIP). ). CO2 flooding has a good potential to be implemented in oil fields in Indonesia because there are many sources of CO2, easy to obtain, very good for increasing production rates in reservoirs with heavy and light oil content, and can reduce the results of environmental pollution from gas emissions. Keywords: CO2 flooding, enhanced oil recovery, environmental pollution, minimum miscibility pressure, recovery factor This is an open access article under the CC–BY-NC-SA license. I. INTRODUCTION The level of primary and secondary oil acquisition at the present time is at 20-40% of total OOIP, which indicates that there is a large potential of oil leftovers in the reservoir. Enhanced Oil Recovery is a well-known technology in the oil industry, which is utilized to increase oil production acquisition by transforming fluid and reservoir rock characteristics. This EOR technology is conducted by injecting a fluid or gas into the production well. To improve oil and gas production in Indonesia, there are two commonly known steps, which are extensification and intensification. The Extensification step is an effort to improve oil recovery by conduction exploration or opening new refineries. Meanwhile, intensification is a means to improve oil and gas production by increasing the