| State-wise Geological Surveys Achievements (Petroleum) of ONGC and OIL in India (Upto 31.03.2013) | |
| States/UTs | Geological Surveys |
| Andaman and Nicobar Islands | |
| Andhra Pradesh | |
| Arunachal Pradesh | |
| Assam | |
| Bihar (Incl. Jharkhand) | |
| Chhattisgarh | |
| Gujarat (Gulf of Cambay) | |
| Himachal Pradesh | |
| Jammu and Kashmir | |
| Kerala-Karnataka (Incl. Goa) | |
| Madhya Pradesh | |
| Maharashtra | |
| Manipur | |
| Meghalaya | |
| Mizoram | |
| Nagaland | |
| Odisha | |
| Rajasthan | |
| Sikkim | |
| Tamil Nadu (Incl. Puducherry) | |
| Tripura | |
| Uttar Pradesh (Incl. Uttarakhand) | |
| West Bengal | |
| Eastern Offshore | |
| Western Offshore | |
| India | |
