Sources said ONGC is understood to be preparing tender documents for the field, which are likely to comprise facilities for its B-147, BSE-11 and NBP fields — all part of the Bassein & Satellites asset.

“We are hearing that ONGC will combine three Bassein area marginal fields and offer them... in one package,” one source said.

The development of the three marginal fields is likely to be worth more than $300 million in total, ONGC recently signalled, though one source said the value of the offshore contract remains unclear.

Those