Assessment of CO2 Geological Storage Potential in a Depleted Oil Field in the North of Thailand

Recently, climate change is the major environmental concern due to the emission of Carbon dioxide (CO2) into atmosphere. The CO2 sources mainly come from power generation. The current technology used to mitigate and store CO2 is carbon capture and storage (CCS) especially geological storage. In Thailand, CCS technology is still infant and less research has been studied. Therefore, this work is focused on the simulation study on the CO2 onshore geological storage in a depleted oilfield in the North of Thailand. The model with local grid refinement demonstrates how CO2 injected into the oilfield can be implemented with the flow rate from 1000-4000 tons/day based on the depth of this area around 2450-2550 meters. The pressure distribution and the movement of CO2 have been studied and predicted within a period of 50 years for CO2 monitoring. The results present that 16 Mt of CO2 storage can be achieved. Furthermore, pressure distribution and CO2 migration are presented without breaking the caprock formation for 50 years. This study can be used as a basic model for CO2 storage in an onshore area in Thailand.