1. Mangla
• Located in Barmer district of Rajasthan.
• Offshore fields here are Mangala, Bhagyam Aishwariya, Sarswati and Rajeshwari.
2. Ankleshwar
• Located in Bharuch district of Gujrat.
• Offshore oilfield.
3. Lunej Field
• Located near Anand district of Gujrat in Cambay Basin.
• India’s first crude oilfield well after Independence.
4. Kalol Field
• Located in Panchmahal district of Gujrat
• Offshore oilfield.
5. Aliabet Oilfield
• Located in Aliabet Island in Gulf of Khambhat, 45km west of Bhavnagar
6. Digboi Oilfield
• Located in Tinsukia, Assam
• The oldest oilfield in India
7. Mumbai High
• Offshore oilfield located 176km west of Mumbai in the Arabian Sea.
• Rock strata are of Miocene age shale.
• The highest oil-producing asset of ONGC.
8. Bassein Field
• Offshore oilfield located south of Mumbai high.
• With production picking up, its now second highest.
9. Panna-Mukta Oilfield
• Offshore oilfield located about 100km northwest of Mumbai.
• A joint venture of ONGC, Reliance Industries and BG Group.
10. Krishna-Godavari Basin
• Natural Gas reserve discovered by Reliance Industries in 2003 in KG basin delta, Andhra Pradesh.
11. Ravva Oilfield
• An offshore oilfield in KG Basin Andhra Pradesh.