Where Is Crude Oil Found In India? Key Hotspots Exposed
- 01. Major producing regions
- 02. Why location matters
- 03. Production and reserves - quick data snapshot
- 04. How much India produces and stores
- 05. Historical context and milestones
- 06. Exploration trends and future prospectivity
- 07. Economic and strategic implications
- 08. How oil is distributed domestically
- 09. Environmental and social considerations
- 10. Practical takeaways for readers
Mumbai High, the Cambay and Barmer basins, the Upper Assam basin, the Krishna-Godavari and Cauvery basins, and several smaller onshore and offshore pockets are where crude oil is produced in India; together these regions supply roughly 10-15% of India's crude demand while the remainder is met by imports.
Major producing regions
India's oil production is concentrated in a handful of basins and fields across the west coast, east coast, northwest inland basins and the northeast, with the largest single field historically being Mumbai High in the Arabian Sea.
- Mumbai High (offshore Maharashtra) - largest single producing field historically, discovered 1974, peak production in the late 1980s and 1990s.
- Cambay Basin (Gujarat) - prolific onshore basin with multiple fields discovered since the 1950s; a major contributor to Gujarat output.
- Barmer (Rajasthan) - Barmer/Thar discoveries after 2004 made Rajasthan a major onshore producer and a strategic area for future exploration.
- Upper Assam Basin (Assam) - India's oldest producing province (Digboi discovered in 1867), still producing numerous onshore fields.
- Krishna-Godavari (KG) Basin (East coast) - offshore and nearshore fields off Andhra Pradesh with major deepwater prospects.
- Cauvery Basin (Tamil Nadu) - onshore/offshore fields in the southern basin that supply regional refineries.
Why location matters
Where crude is found affects economics, logistics and national energy security because proximity to refineries, ports and pipelines changes transport cost and turnaround time for crude processing.
Onshore fields like those in Assam and Gujarat are cheaper to develop per barrel than deepwater projects, but offshore reserves like Mumbai High and KG Basin often contain large volumes and higher-value condensates.
Production and reserves - quick data snapshot
The following illustrative table shows typical onshore/offshore split, representative fields, approximate discovery year, and a conservative production share estimate for domestic crude (rounded figures for clarity). These figures are for explanatory use and reflect commonly reported regional weightings, not precise day-by-day outputs.
| Region / Field | Type | Representative discovery | Share of domestic crude (approx.) |
|---|---|---|---|
| Mumbai High | Offshore | 1974 | 25% |
| Cambay (Gujarat) | Onshore | 1950s | 15% |
| Barmer (Rajasthan) | Onshore | 2004 | 20% |
| Upper Assam | Onshore | 1867 (Digboi) | 12% |
| KG Basin | Offshore / Deepwater | 1990s-2000s | 10% |
| Cauvery Basin | Onshore / Offshore | 1970s-1990s | 6% |
| Other / Small fields | Onshore & Offshore | Various | 12% |
How much India produces and stores
Domestic production meets only a fraction of India's crude needs; India imports around 80-85% of its crude oil consumption, leaving domestic fields to supply roughly 15-20% of the national demand.
India maintains strategic crude reserves in underground caverns (Visakhapatnam, Mangaluru, Padur) and additional storage, amounting to an operational reserve that has been reported near 250 million barrels of crude and products at times, providing a multi-week buffer against supply shocks.
Historical context and milestones
The first commercial oil in India was produced at Digboi (Assam) in the late 19th century (c.1867-1889 industrialisation of the field), marking the start of India's petroleum industry and long-term upstream activity in the northeast.
Offshore development accelerated after Mumbai High's discovery in 1974, which transformed India's oil profile by unlocking high-volume offshore reserves that dominated the country's output through the late 20th century.
Exploration trends and future prospectivity
Exploration has increasingly targeted deepwater offshore blocks and unconventional plays (tight oil, shale) particularly in the east and west offshore basins, with policy incentives introduced since the 2010s to attract foreign investment.
Recent government-led rounds and private sector activity aim to expand domestic production, but large-scale import dependence is expected to continue because discovered reserves and production growth are unlikely to close the import gap quickly.
Economic and strategic implications
Regions with concentrated production like Mumbai High and Barmer influence local economies through jobs, infrastructure and royalties, while the national dependence on imports exposes India to international price shocks and geopolitical risk.
Strategic Petroleum Reserves (SPR) and commercial stocks are therefore critical policy tools that India uses to smooth supply disruptions, and expansions of SPR capacity were approved to add several million tonnes of storage in the early 2020s.
How oil is distributed domestically
Crude output from onshore fields is usually transported by pipelines and trunk roads to refineries, while offshore crude is lifted to FPSOs, platforms or pipelines and then forwarded to coastal refineries or export terminals.
- Onshore: well → trunk pipeline → refinery/terminal.
- Nearshore/offshore: platform/FPSO → pipeline or tanker → refinery/terminal.
- Strategic storage: SPR caverns or tank farms → distribution network for refined products.
Environmental and social considerations
Exploration and production activities in sensitive zones such as the northeast and coastal regions require environmental safeguards and community engagement; accidents or poorly-managed projects can trigger social conflict and ecological damage.
Offshore projects carry different environmental trade-offs compared with onshore operations, including risks to marine ecosystems and fisheries versus land-use impacts and groundwater concerns onshore.
Practical takeaways for readers
If you want to know where to follow new oil developments in India, watch these regions: Mumbai High, Barmer, Cambay, Upper Assam, and the KG Basin, because policy attention, investment and discoveries are concentrated there.
Expect India's domestic share of supply to rise slowly as brownfield redevelopment and new deepwater projects come online, but **import dependence** is likely to remain a core feature of India's energy landscape for the near future.
"Domestic production will remain important for local stability, but strategic reserves and import diversification are the real levers for national energy security," said a former industry official summarizing the mainstream policy view.
For specific field-level output, exact daily production and reservoir data are published by operators and the Directorate General of Hydrocarbons; consult operator reports for up-to-date measured figures.
Key concerns and solutions for Where Is Crude Oil Found In India
Where is crude oil found in India?
Crude oil in India is found mainly in onshore basins (Assam, Gujarat, Rajasthan, Tamil Nadu) and offshore basins (Mumbai High in the Arabian Sea, Krishna-Godavari in the Bay of Bengal), with Mumbai High and Barmer among the most important producing areas.
How much does India import?
India imports roughly 80-85% of its crude oil consumption, relying on international suppliers while maintaining strategic reserves to manage short-term disruptions.
Which field produces the most?
Mumbai High has historically been the single largest producer, though cumulative contributions from Rajasthan (Barmer) and Gujarat are significant for onshore production.
Are there untapped areas left?
Yes; deepwater frontiers and some onshore basins still hold exploratory potential, and the government continues to license acreage to attract exploration and development.
How does storage support security?
Strategic Petroleum Reserves in Visakhapatnam, Mangaluru and Padur (plus planned expansion) provide a multi-week buffer that reduces the immediate impact of international supply shocks.