A Numerical Modeling of CO2 Injection into the Depleted Donghae-1 Gas Field

In this study, we evaluated the storage capacity of carbon dioxide injection into the depleted reservoirs of the Donghae-1 gas field, which is being promoted as Korea’s first Carbon Capture and Storage (CCS) demonstration project. A new reservoir model for the Donghae-1 gas field was constructed using existing seismic and well data for the Donghae gas field, through which carbon dioxide injection simulations were performed according to various injection scenarios. As a result of the simulation, it was found that the Donghae-1 gas field has a safe storage capacity of 400,000 tons of carbon dioxide injection per year for up to about 28 years; this is the initial target rate of the CCS demonstration project using the Donghae-1 gas field. These will be used as basic data for the project along with the results of additional research, such as the Geomechanics study.