The expansion will use 10.6 hectares of existing land inside the plant and another 41 ha to be acquired.
The government will infuse equity of $503 million (VND12.5 trillion), while the rest will come from borrowings.
The work will last in 37 months and be completed in the first quarter of 2028.
The refinery’s technology and plants will be upgraded with five new workshops for processing gasoline with hydrogen, processing diesel with hydrogen, alkylation, hydrogen production, and sulfur recovery.
The refinery in the Dung Quat Economic Zone in Quang Ngai Province is operated by the Binh Son Refining and Petrochemical JSC and supplies 35% of Vietnam's petroleum requirements.