Which state has huge reserves of mineral oil?

The correct answer is Assam. Important Points Assam has a 27% of crude oil reserve, (which in highest onshore reserve) in India followed by Gujarat 19% and Rajasthan 5%. But Rajasthan accounts 27 % production of crude oil in India followed by Gujarat 13%. The state of Assam accounts for about 12.% of Indian Crude Oil output. The Oil wells at Digboi, Duliajan and Sibsagar also produce natural gas. Key Points Assam was the starting point from where the oil industry in India took to its wing way back in the 19th century. It was in 1889, when Well No.1 at Digboi, completed in 1890, yielded oil to make production commercially viable. In 1899, the Assam Oil Company was formed to take up the oil interest in the Digboi-Makum area. Additional Information Rajasthan Rajasthan is the 2nd latest mineral producing state in the country, sharing 9% of the country’s total mineral production. The Mangala Area is a major oil field in Rajasthan that produces about 200,000 barrels of oil per day. Tamil Nadu Major minerals including limestone, graphite, bauxite, iron ore, and vermiculite are abundant in Tamil Nadu. Minor minerals include granites, clay, silica sand, and lignite. Fuel minerals include petroleum and natural gas. Atomic minerals include monazite, rutile, and ilmenite.