There is a proposal to convert partially depleted gas fields of the Cambay Basin, some 60 km off Vadodara, into a mega underground gas storage (UGS) station. The three billion cubic metre gas fields, discovered by the Oil and Naturgal Gas Corporation (ONGC) in 1958, are said to be depleted by 50-60 per cent, and would require the fresh infusion of 1.5 billion cubic metres of gas to become technically viable.