Oil Discovery History in India: From Digboi to the Andaman Deepwater Breakthrough

In the silent depths of the Andaman Sea, India may be standing at the brink of a transformative energy moment. Preliminary geological data points to the presence of massive hydrocarbon reserves in the ultra-deep waters of the Andaman Sea, with the potential to rival some of the largest offshore oil finds in recent decades. 

If confirmed, this discovery could reshape India's energy strategy, enhance its geopolitical leverage, and dramatically improve its long-term energy security.

But to fully appreciate the significance of this potential breakthrough, it's important to understand the journey of India’s petroleum industry—from its colonial-era beginnings in Assam to today’s ambitions of offshore self-reliance.

India’s Oil Journey Began in Digboi

India’s tryst with oil began in 1867, when the country’s first oil well was drilled in Digboi, Assam. This marked the dawn of India’s exploration and production capabilities, at a time when petroleum was fast becoming a strategic global commodity. The formation of Indian Oil Corporation in 1959 provided institutional strength to refining and marketing operations.

The 1990s liberalisation era brought a wave of private and foreign investment, transforming the sector. PSUs like ONGC and IOC led the charge, while mega refineries like Jamnagar in Gujarat positioned India as a refining hub in Asia.

Policy reforms, including the National Exploration Licensing Policy (NELP), boosted exploration. Today, India holds 651.8 million metric tons of crude oil and 1,138.6 billion cubic meters of natural gas reserves evidence of both its progress and untapped potential.

India’s Petroleum Ecosystem Today

Today, India’s petroleum industry is a complex and dynamic sector involving:

• Upstream: Crude oil and natural gas extraction.
• Midstream: Transportation and storage.
• Downstream: Refining and marketing of fuels such as petrol, diesel, LPG, and kerosene.

India now operates 23 refineries (19 PSU, 3 private, 1 joint venture) with a total capacity of 256.8 MMTPA (up from 215 MMTPA in 2014). Notably, the Jamnagar Refinery in Gujarat stands as one of the largest in the world.

The Andaman Sea Discovery: A New Frontier

The latest buzz surrounding a potential offshore oil bonanza in the Andaman Sea marks a critical milestone in India’s energy journey. For a country that imports over 85% of its crude oil, tapping into indigenous ultra-deepwater reserves could be a game-changer.

The discovery reportedly spans hydrocarbon-rich blocks with the potential to significantly reduce import dependency, provided extraction is economically and environmentally viable.

This is not just another drilling campaign. It could lay the groundwork for:

• Greater energy independence
• Strengthened foreign policy through energy diplomacy
• Strategic control over offshore maritime zones

Yet, as history shows, discovery is just the beginning. How the windfall is governed, distributed, and integrated into the national energy mix will ultimately determine its long-term impact.

India’s Global Energy Standing

India ranks among the top global players in petroleum refining and exports:

• 4th in global refining capacity
• 7th largest exporter of refined products
• 2nd in ethanol blending
• 3rd in global biofuel production
• 4th in LNG terminal capacity

India has also significantly expanded its export footprint, serving markets across South Asia, Africa, and Europe. Its refining infrastructure boosted by SEZs and export-oriented policies has positioned it as a hub in the global energy supply chain.

What Lies Ahead?

With over 651.8 million metric tons of crude oil reserves and 1,138.6 billion cubic meters of natural gas, India’s sedimentary basins offer immense untapped potential. Plans are already underway to expand exploration acreage to 1 million square kilometers by 2030.

Simultaneously, recent policy changes like cutting approval steps for exploration from 37 to just 18 (with 9 available via self-certification) are designed to fast-track future projects, including those in sensitive regions like the Andaman basin.

Conclusion

From the forests of Digboi to the ultra-deep frontiers of the Andaman Sea, the arc of India’s oil exploration history tells a story of ambition, resilience, and reinvention. The Andaman discovery, if realised, could represent a historic inflection point a moment where India transitions from energy dependence to a more balanced, self-sustaining model.

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