Assam is the second place in the world where petroleum was discovered.
Asia’s first successful mechanically drilled oil well was drilled in Makum , Assam way back in 1867.
Digboi Refinery, commissioned on 11th December 1901, is India’s oldest operating refinery and one of the oldest operating refineries in the world.
The historic Digboi Refinery has been termed as the "Gangotri of the Indian Hydrocarbon sector.”