Oil and Natural Gas Corporation, ONGC, began it's operation in Assam in post freedom days in mid 1960s. It discovered new oil Basin in Sibsagar, Assam. From that point forward ONGC and oil has been a vital piece of Sivasagar's developing economy. The ONGC's commitments to the advancement of the district is huge.

ONGC Nazira:

As of now the provincial Head office of ONGC is arranged in Nazira. Nazira town is approx. 15 kilometers east from Sivasgar ( Sibsagar ) town.The private ongc state of Nazira is arranged on the banks of the waterway Dikhow. It gives all present day civilities, great instructive organizations to the occupants of the settlement. The state has a Kendriya Vidyalaya.

ONGC Colony of Sivasagar:

The ONGC settlement of Sivasagar is arranged in the heart of the town. It is nearby commercial center like station chariali, furthermore near local location like Amulapatty, Ganakpatty. Kendriya Vidyalaya, Sivasagar is arranged inside Sivasagar ongc province.

Oil fields around Sivasagar:

The oil and gas fields are arranged around Sibsagar town. There are numerous fields situated in Lakowa, Geleki, Gaurisagar, Nazira. The oild fields are scattered around the regions for the most part in town territories. The fire of the gas-flame will effectively demonstrate oil and gas field close by around evening time. This is an another human touch added to the characteristic magnificence of a quiet town.