Perpustakaan Digital ITB

The oil and gas industry plays a major role as the world's main energy provider, but also contributes significant CO2 emissions. Indonesia, as a major oil and gas producer in Southeast Asia, aims to reduce greenhouse gas emissions by 29% by 2030. One solution being developed is Carbon Capture, Utilization, and Storage (CCUS) technology. The application of this technology to gas condensate reservoirs, through the Enhanced Gas Recovery (EGR) mechanism, is a strategic approach to address production and emissions challenges at once. This study aims to analyze the sensitivity to three main parameters: injection rate, injection time to saturation pressure, and injection zone. Simulations were conducted using a synthetic model based on the modified Norne Field reservoir, with tNavigator software. A total of 16 simulation scenarios were run to evaluate the effect of each parameter on gas production, condensate production, plateau duration and CO2 storage capacity. Simulation results show that the best combination is obtained at a low injection rate, injection after saturation pressure is reached, and injection in the gas zone. This combination provides a longer plateau time, higher gas and condensate recovery factors (with some other factors and considerations), and maximum CO2 storage capacity. In contrast, high injection rates and injection in the water zone showed lower efficiency due to limited fluid mobility and uneven CO2 distribution. This research provides practical insights for optimizing CO2 injection strategies that not only aim to increase hydrocarbon production, but also support the sustainability of the energy industry through long-term CO2 storage.