"It doesn't make any business sense to hold such a small percentage stake and it is best that ONGC buys out GAIL in the project," they said.
The 1.1 million tonnes plant, which at the time of conception was projected to cost Rs 124.4 billion, got completed only last year for about Rs 300 billion.
After GAIL in 2008 agreed to pick up 19 per cent stake in OPaL, the project cost was in 2010 was revised to Rs 195.35 billion. It was couple of years later further revised upwards to Rs 213.96 billion with December 2013 set as the commissioning date.
Sources said when project cost was revised to Rs 195.35 billion, GAIL decided to restrict its participation to 17 per cent. This was done because the company's board had powers to approve an investment of only up to Rs 10 billion.
Consequently, it decided to make an equity contribution of Rs 996.28 crore towards the 17 per cent stake, they said.
But when the project cost went up further to Rs 213.96 billion, the promoter's equity contribution increased from Rs 58.60 billion to Rs 64.18 at 70:30 debt-equity ratio.
GAIL, sources said, is not inclined to make any additional equity contribution and has decided to cap its investment in OPaL at the capital it has already approved Rs 9.96 billion. This, in the revised project cost, fetched it only 15.5 per cent stake.
Now that the project cost almost touched Rs 30,000 crore, that investment is equivalent to only about 9 per cent stake.
Sources said GAIL would, however, continue to hold rights to market 38 per cent of the polymer and other chemicals produced by OPaL even at the reduced equity stake.
ONGC has funded almost all of the enhanced project cost after GAIL as well as Gujarat State Petroleum Corp (GSPC), which was to originally hold 5 per cent stake, did not make more equity contributions.
ONGC had attributed the increase in project cost primarily to additional cost of Phase-II captive power plant and increase in cost of building the Phase-I electricity generating unit.