Crude Oil: Crude oil is the most important mineral product of Assam. Total production of petroleum crude in Assam accounts for nearly 50 percent of country’s total petroleum output till 1970. Assam produced about 15 percent of total petroleum crude produced in India. Crude oil is available in Sibsagar Jorhat, Golaghat, Tinisukia and Dibrugarh and estimated a reserved of 70.46 million tonnes. Oil deposits in Assam are found in Naharkatiya, Moran, Hugrizan, Rudrasagar, Galeky, Lakwa, Nazira, Teok etc.