India’s Andaman Sea Oil Discovery Triggers Massive East Coast Energy Exploration Drive

India just found something it desperately needed and the timing could not be more significant. Oil India Limited’s discovery of natural gas at the Sri Vijayapuram-3 well, approximately 15 kilometres off the east coast of the Andaman Islands, has confirmed what geologists have long theorized: that India’s eastern offshore frontier holds reserves of genuinely transformative scale.

Fresh seismic surveys have revised estimated reserves in the Andaman basin upward from 180 million tons to 610 million tons of oil and oil equivalent gas a more than threefold upgrade that has sent India’s energy planning community into overdrive. Union Minister Hardeep Singh Puri, announcing the find, did not undersell it: India’s petroleum ministry has publicly compared the Andaman basin’s potential to offshore Guyana one of the most celebrated deepwater discovery zones of the past decade stating, “We have the potential for several Guyanas in the Andaman Ocean.”

That ambition is no longer abstract. It is now backed by drilling results, seismic data, and a government prepared to spend at a scale India’s upstream sector has rarely seen.

Why This Discovery Hits Differently in 2026

Context is everything. The Strait of Hormuz has been effectively closed since February 28, 2026, when US and Israeli strikes triggered the Iran war and Iran’s Revolutionary Guard Corps blocked the world’s most critical oil chokepoint. For India, the consequences have been severe and immediate: the Hormuz strait accounted for approximately 41% of India’s crude imports, 55% of LNG imports, and 88% of LPG imports in the first nine months of FY2026.

Oil Marketing Companies are absorbing losses of up to ₹1,000 crore per day. India’s GDP growth forecast for FY2026/27 has been slashed to 6.7% from 7.7% by Fitch Group’s BMI. The government has scrambled to reroute supply expanding crude sourcing from around 20 countries to approximately 40, commissioning India’s first very large crude carrier (VLCC) terminal at Mundra port, and absorbing record volumes of Russian Urals crude under temporary US waivers that expired in April.

Against this backdrop, an offshore discovery that could eventually displace a meaningful share of import dependence is not just an energy story it is a national security story. As CNBC has reported, India’s energy crisis has deepened precisely as its traditional supply buffers eroded simultaneously. The Andaman find offers a long-term answer to a short-term crisis that has exposed just how exposed India’s 85% import dependency truly is.

Samudra Manthan: India’s $20 Billion Deep-Sea Gamble

The Andaman discovery is the headline, but it sits within a far larger strategic programme. ONGC’s Samudra Manthan (Deep-Sea Mission), unveiled earlier this year, commits $18–20 billion over five years to the most ambitious deepwater drilling campaign in Indian history. A tender floated in February 2026 with a pre-bid meeting in March — seeks the mobilisation of deep-water drillships and semi-submersible rigs within 80 days, targeting the KG Basin and ultra-deepwater blocks in the Andamans.

The government has simultaneously launched OALP Round XI, offering 21 oil and gas exploration blocks across 80,228 square kilometres to private and international players. India is putting up to 50 blocks on offer for 2026 — an unprecedented volume of acreage designed to attract global capital into a sector that has historically underperformed its geological promise.

The corporate alignment behind this push is equally significant. In January 2026, ONGC and Reliance Industries signed a landmark deepwater resource-sharing agreement covering the Krishna Godavari (KG) basin and Andaman offshore operations a deal that brings in global partners including BP, ExxonMobil, TotalEnergies, and Petrobras. A further Joint Operating Agreement between ONGC, BP, and Reliance for Block GS-OSHP-2022/2 in the Saurashtra Basin was announced in July 2026, extending the collaborative framework to India’s west coast.

As Outlook Business reports, Samudra Manthan represents India betting that its geological endowment — long under-drilled relative to comparable basins globally can finally be converted into production at scale.

The Bay of Bengal: A New Energy Frontier

Beyond the Andaman find, India’s Modi government has launched a mega seismic survey spanning 161,000 line kilometres across the Bay of Bengal and adjoining basins one of the largest offshore survey programmes in India’s history. The Directorate General of Hydrocarbons is leading the campaign across the Bengal-Purnea, Mahanadi, Krishna-Godavari, Cauvery, and Andaman offshore basins over two years.

The Andaman-Nicobar Basin sits between two proven petroliferous zones Myanmar to the north and Sumatra to the south with geological characteristics that closely mirror hydrocarbon-rich formations across Southeast Asia. The Sri Vijayapuram-3 well, drilled at 355 metres water depth, tested gas with approximately 87% methane content commercially attractive purity that has validated the basin’s production potential beyond theoretical estimates.

As The Diplomat has noted, the Bay of Bengal energy scramble is now firmly underway and India, unlike some of its neighbours, entered 2026 with the policy architecture, corporate partnerships, and geopolitical urgency to move at pace.

Strategic Location: More Than Just Energy

The Andaman and Nicobar Islands occupy one of the most strategically sensitive positions in the Indo-Pacific commanding the northern entrance to the Strait of Malacca, through which roughly 80% of China’s oil imports transit. Developing energy infrastructure in the Andaman Sea is therefore simultaneously an economic and a geopolitical act, extending India’s operational presence in a maritime zone of growing strategic competition.

As US-Iran talks grind toward a resolution that may eventually reopen the Strait of Hormuz, India is playing both the short game rerouting Middle East imports and securing Russian crude and the long game: building domestic production capacity so that the next Hormuz crisis, if it comes, finds India far less exposed than it was in February 2026.

The Andaman discovery is the clearest signal yet that the long game has begun in earnest.