When we look at expanding the domestic energy resource base it need only be R&D by public and private enterprises.
Since India is primarily a rural country we should look at ways to utilize the locally available energy good to generate the energy needed for the village / home / community. I believe going Biogas way in place of LPG would go long way of building sustainable domestic energy base in India and also reducing the imports.
This can be also extended to urban area particularly by making biogas plants mandatory for colonies / skyscrappers / new townships / independent houses.
Supporting the above statement please find below the link for biogas plant build by institution called Appropriate Rural Technology Institute (ARTI) , Pune, which can generate gas in 8 hours and cost effective and may be given subsidy here which would work out given the fact for its long lifetime.http://www.arti-india.org/index.php?opt ... &Itemid=52
I am not a proponent of the above technology, I just feel this would be good technology to work with.