The Earth’s climate is increasingly altering by human activities. One of the concerns is related to the concentration of greenhouse gas in the atmosphere. The most significant greenhouse gas is CO2. Consequently, the amount of CO2 must be decreased. This can be accomplished by means of carbon dioxide capture and storage (CCS), also known as CO2 sequestration. The entrapment of CO2 in the oil reservoirs during CO2-based EOR has recently started to be considered to use in conjunction. It is a win-win project in which the recovery factor can be increased, while the amount of greenhouse gas emissions- reduced. Thecosts of CO2 capture and storage can, in many cases, be compensated by improved recovery.