Abstract
Sequestration of CO2 in depleted gas condensate reservoir has several advantages including enhanced hydrocarbon liquid recovery. Depleted gas condensate reservoirs have 13 times higher capacity than saline aquifers for CO2 storage. The injection of CO2 vaporizes the liquid that has been trapped in gas condensate reservoirs during the depletion process. This results in an increase in the pore space for storage purposes as well as enhanced economics due to additional liquid recovery. The improvements in liquid recovery will depend on purity of CO2. A compositional reservoir simulator was utilized in this study to investigate the impact of reservoir characteristics including permeability, porosity, heterogeneity, pressure, and temperature on CO2 distribution and interaction with hydrocarbons in the gas/condensate reservoirs. The results have utilized to study CO2 storage and improved liquid recovery.