INA was the first company which introduced enhanced oil recovery (EOR) methods in oil production in Croatia and is among few European companies which successfully implement this method.
One of major E&P investment projects.
EOR method involves water alternating CO2 injection in partially depleted mature oil reservoirs where physical and chemical mechanisms result in oil production increase and incremental recovery.
The project has an important environmental aspect as it involves injection and permanent underground storage of CO₂, which reduces air emissions.
EOR has been implemented in the Ivanić field since 2014, and in the Žutica field since 2015.

Exploration and Production