The northern part of the Cambay Basin located in Mehsana at Gujarat, is enclosed by a number of heavy oil fields. Featured here is the Mehsana asset of ONGC, located in northern part of Gujarat State, which is the most oil producing onshore asset of Oil and Natural Gas Corporation Limited (ONGC). It is a state-owned oil and gas company in India. It is one of the Asia's largest and most active companies involved in exploration and production of oil.