Three units, including gas sweetening, C2+ recovery, and polypropylene have commenced operations.
BCPL managing director Prasad was quoted by The Times of India as saying that the project will help in socio-economic development in northeast India.
The partners plan to commission the remaining two units of the project, including the ethylene cracker unit and linear low density polyethylene (LLDPE) / high density polyethylene (HDPE) unit in two months.
Initially scheduled for completion by April 2012, the petrochemical project was delayed causing budget overrun.
The project costs were later revised to Rs92.85bn ($1.47bn) from the initially planned Rs54.6bn ($864.9m).
Using natural gas and naphtha as feedstock, the gas cracker complex is expected to produce 220,000t of LLDPE and HDPE, and 60,000t of polypropylene a year.
The petrochemical products produced at the plant will be marketed by Gail and BCPL as part of a deal signed earlier.
Gail owns 70% stake in the project, while Oil India (OIL), Numaligarh Refinery (NRL) and Assam Government each hold 10%.
