New Delhi The initial hype over India’s shale gas potential seems to be making way for a more sober assessment of the unconventional energy that could actually be extracted from rock formations.

From an initial assessment of 300 trillion cubic feet (TCF) to 2,100 TCF of producible and non-producible gas present in Indian basins (called in-place gas), the latest study has brought down the ‘technical recoverable’ gas to about 6.1 TCF.