Perpustakaan Digital ITB

As global energy demand grows, oil and gas exploration and production become more crucial than ever. However, the environmental impact of fossil fuel extraction is becoming more scrutinized. Carbon Capture and Storage (CCS) is the most promising method for decreasing CO2 emissions from large-scale fossil fuel consumption. The study aims to investigate the effectiveness of CO2-Acetone injection, specifically its effects on CO2 storage capacity, by modeling the wettability properties of various rock types and simulating continuous injection scenarios. The commercial reservoir simulator Computer Modeling Group (CMG-GEMTM) is used in this study. For hysteresis modeling, there will be two main cases, one with a constant Land coefficient for all rock types and the other with a Land coefficient that varies with rock type wettability. The flow rate was used to control the injection well for CO2-Acetone. CO2-Acetone was injected for three different periods 1 year, 10 years, and 20 years. The injection phase was followed by various storage times. The existing wells will be produced in natural flow for 5 years from January 1st, 2021, and the forecast simulation will be carried out beginning January 1st, 2026. The results of this study show that CO2-Acetone injection has a higher CO2 trapping efficiency than pure CO2 injection over lengthy periods. The residual trapping of CO2-Acetone will be greater in 2043, while the solubility trapping will be greater in 2051, after 16 and 25 years of injections, respectively. Furthermore, increasing the injection time and injection rate of CO2-Acetone depending on the wettability of the rock type resulted in increased CO2 storage efficiency. The optimal storage efficiency is achieved with an injection rate of 1 MMSCFD and a 20-year injection duration, resulting in a CO2 storage efficiency of around 51%.