Performance-driven optimization of CO₂ storage with enhanced gas recovery in a depleted gas reservoir: Insights from the Qiongdongnan Basin, South China Sea

A reservoir model incorporating four reservoir gases was built based on the field information of the offshore depleted Ya 13-1 gas field in the Qiongdongnan Basin, China. The model adopted two well configurations, four stages framework to optimized the strategy of CSEGR by TOUGH + RealGasBrine. These data include the mass flow rates of CH4, C2H6, CO2 and N2 for different CASE production wells, as well as the processing of related data, such as recovery rate and shut-in time.