Bengal Basin is India’s 8th oil and gas producing basin of India. ONGC recently commenced production of crude oil from its Asokenagar-11 well. With this, the ONGC has put 83% of India’s established oil and gas reserves to production. India has 26 sedimentary basins of which 16 are onland basins and 3 are ccompletely offshore basins. 7 are located both off-shore and onland. Together they cover an area of 3.4 million square kilometres.