RIL had got the block in an intensely fought auction by submitting better commercial and technical bids than other bidders including ONGC-GAIL and Cairn Energy.
The government had in 1999 bid out KG-D6 and 23 other blocks through an international open tender under the New Exploration Licensing Policy that was formulated after four years of intense public consultations and using the best practices from the world over, a Petroleum Ministry official said.
RIL offered better commercial and technical terms than public sector ONGC-GAIL combine and Cairn Energy to win the KG-D6 block and signed Production Sharing Contract in April 2000 on terms that were similar of the other block winners that included Gazprom of Russia, ONGC and Cairn, the official added.
On Wednesday, India Against Corruption had alleged that the United Progressive Alliance and the previous National Democratic Alliance governments had favoured RIL by giving KG-D6 gas exploration contract and concessions at a huge cost to the exchequer.
Separately, a source close to RIL said both the PSC as well as the terms of auction were always widely publicised and have been in public domain since 1999.
"It is surprising that a lawyer like Prashant Bhushan should pretend such ignorance about either of these and wilfully misrepresent both."
On the charge that KG-D6 cost going up from $2.47 billion to $8.8 billion was on account of gold-plating, he said cost escalation occurred in tandem with similar well documented escalations in projects across the world.
The source said RIL has already informed the government that it has spent only about $5.7 billion so far and balance $3 billion out of $8.8 billion will not be required to be spent due to unforeseen geological complexities.
On gas price revision, he said the PSC demands that the contractor, who wins the block through a process of open auction, sell the gas produced also through a similar process of auction so as to get the best available arms-length
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