"RNRL will intervene in the RIL-NTPC High Court matter," a source familiar with the matter said.
Earlier this week, the Bombay High Court asked RIL to honour a 2005 family agreement to supply 28 million cubic meters per day of gas from its Krishna-Godavari basin fields at $2.34 per mmBtu for 17 years to RNRL.
As per the ruling, RIL has been asked to supply gas at a price 44 per cent lower than rates approved by the government.
The price for RNRL was derived from the 2004 agreement between RIL and NTPC. However, this RIL-NTPC contract is also a subject matter of case before another bench of the Bombay High Court as RIL has said that the contract was not concluded.