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India's 100 million barrel crude stocks could cover 40-45 days if Hormuz flows disrupted

March 03, 2026 6 min read Economics International Relations GS Paper 3 (Indian Economy Energy Security) GS Paper 2 (International Relations)
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What Happened

  • India holds approximately 100 million barrels of combined crude oil stocks — spanning strategic petroleum reserves (SPR), commercial refinery inventories, and crude in transit on ships — which could cover approximately 40–45 days of its requirements if the Strait of Hormuz is completely blocked.
  • This estimate was highlighted by government and industry officials in early March 2026 as the Strait of Hormuz experienced an 81% drop in vessel traffic following the escalation of the Iran-US-Israel conflict.
  • India imports approximately 2.5 million barrels per day through the Strait of Hormuz — roughly half of its total crude imports of just over 5 million barrels per day — making a Hormuz disruption a direct and significant supply risk.
  • India's dedicated strategic petroleum reserves (managed by ISPRL — Indian Strategic Petroleum Reserves Limited) have a total capacity of 5.33 million metric tonnes (MMT) at three underground rock cavern facilities: Visakhapatnam (1.33 MMT), Mangaluru (1.5 MMT), and Padur (2.5 MMT) — providing approximately 9.5 days of emergency coverage on their own.
  • The remaining buffer comes from commercial crude inventories held by refiners and oil marketing companies (OMCs) and crude on voyages bound for India.
  • The 40–45 day buffer is considered sufficient for a short-term disruption but not for a sustained closure — a prolonged Hormuz blockade would require India to rapidly diversify sourcing (accelerating Russian and African crude imports) and potentially release strategic reserves.
  • Government officials noted India is already diversifying away from Hormuz-transiting crude, having significantly increased purchases from Russia (which ships via Arctic/Pacific routes, bypassing Hormuz).

Static Topic Bridges

India's Strategic Petroleum Reserves (SPR) Programme

Strategic Petroleum Reserves (SPR) are government-held emergency crude oil stocks designed to cushion the economy against supply shocks. The IEA (International Energy Agency) requires member states to maintain at least 90 days of net oil import coverage in strategic reserves. India, not being a full IEA member, targets its own buffer through the ISPRL programme alongside commercial inventories.

India's SPR programme was launched in 2004 following recommendations from the Expert Committee on Integrated Energy Policy. ISPRL (Indian Strategic Petroleum Reserves Limited) — a subsidiary of the Oil Industry Development Board (OIDB), Ministry of Petroleum — manages the three underground cavern facilities.

  • ISPRL established: 2004 (under Ministry of Petroleum and Natural Gas)
  • SPR locations and capacities: Visakhapatnam, Andhra Pradesh (1.33 MMT); Mangaluru, Karnataka (1.5 MMT); Padur, Karnataka (2.5 MMT)
  • Total SPR capacity: 5.33 MMT (approximately 39 million barrels)
  • SPR coverage on its own: approximately 9.5 days of India's total consumption
  • IEA standard: 90 days of net import coverage (India's SPR alone falls far short; commercial inventory bridges the gap)
  • Phase 2 SPR expansion: Government of India announced plans for additional cavern sites (Chandikhol in Odisha and Padur expansion) targeting ~12 days of additional emergency coverage by 2029–30
  • SPR can be loaned to international oil companies for fill-and-drawdown arrangements (e.g., ADNOC of UAE stores crude in Padur under a commercial agreement)

Connection to this news: India's 9.5-day SPR-only buffer is far below the IEA's 90-day standard and significantly below the 40–45-day combined stock buffer being cited — meaning India's security depends heavily on commercial inventories and in-transit crude, not a robust strategic reserve. This highlights the urgent need for the Phase 2 SPR expansion programme.

India's Oil Import Geography and Diversification Strategy

India's oil import geography has shifted significantly over the past four years. Prior to the Ukraine war, over 60% of India's crude came from West Asian countries — Saudi Arabia, Iraq, UAE, Kuwait — all of which transit the Strait of Hormuz. The surge in Russian crude imports post-2022 has reduced this Hormuz exposure, since Russian ESPO and Urals crude arrives via the Pacific (Vladivostok to India's east coast ports) or the Suez Canal route.

However, even with Russian crude at ~36% of imports, India still sources approximately 50–52% of its crude via Hormuz-transiting routes. The 40–45 day buffer assumes this 50% Hormuz exposure is interrupted while the remaining 50% (Russian, African, and other non-Gulf sources) continues uninterrupted.

  • India's Hormuz-transiting crude imports: ~50–52% of total imports (~2.5 million b/d out of ~5 million b/d total)
  • India's total crude consumption: approximately 5.3–5.5 million b/d
  • Key Hormuz-dependent suppliers: Iraq (~22% share), Saudi Arabia (~15–17%), UAE (~10%), Kuwait (~5%)
  • Non-Hormuz sources: Russia (~36%, arrives via Pacific/Suez), US (~6–7%, Atlantic route), West Africa (~5–7%)
  • India has begun preliminary discussions on increasing US crude imports (WTI crude from the Gulf of Mexico) as a strategic hedge
  • India's refinery infrastructure: approximately 250 million tonnes per annum (MTPA) refining capacity — one of the world's largest
  • Indian refiners' tank storage: approximately 30–40 days of crude at normal throughput rates (commercial buffer)

Connection to this news: India's 40–45 day buffer assumes half its import supply is cut off (Hormuz) while the other half (Russia, Africa, US) continues. This structural shift in India's import geography — towards non-Hormuz sources driven by the Russia pivot — is providing India a critical cushion in the current crisis.

India's Energy Security Policy and Institutional Framework

Energy security — defined as ensuring reliable, affordable, and sustainable energy access — is a core element of India's economic policy. The government's approach combines import diversification, domestic production enhancement, strategic reserves, and renewable energy transition.

Key institutions and policies governing India's energy security include: Ministry of Petroleum and Natural Gas (MoPNG), Directorate General of Hydrocarbons (DGH), ISPRL, Oil Industry Development Board (OIDB), and the PNGRB. The Hydrocarbon Exploration and Licensing Policy (HELP, 2016) and the National Energy Policy framework guide long-term planning.

  • Ministry of Petroleum and Natural Gas (MoPNG): apex body for hydrocarbon policy
  • Directorate General of Hydrocarbons (DGH): technical regulator for upstream exploration and production
  • Oil Industry Development Board (OIDB): administers ISPRL and the Oil Industry Development Fund
  • PNGRB (Petroleum and Natural Gas Regulatory Board): regulates midstream/downstream pipelines, CGD, LNG terminals under PNGRB Act 2006
  • Hydrocarbon Exploration and Licensing Policy (HELP, 2016): replaced NELP; introduced uniform licensing, revenue sharing, and open acreage
  • National Mission on Strategic Petroleum Reserves: Cabinet-approved expansion to Phase 2 (Chandikhol, Padur extension)
  • India's domestic crude production: approximately 26–28 million metric tonnes per year (FY2024); meeting only ~12% of requirements
  • ONGC and OIL (Oil India Limited) are the two primary state-owned upstream producers; ONGC accounts for ~70% of domestic crude production
  • Oilfields (Regulation and Development) Amendment Act, 2025 (ORDA 2025): latest legislative reform to promote upstream investment

Connection to this news: The 40–45 day crude buffer provided by India's combined SPR and commercial stocks — while helpful for short-term shocks — underscores the fundamental inadequacy of India's energy security position. It reinforces the policy case for: (a) accelerating Phase 2 SPR expansion; (b) increasing domestic upstream production; (c) accelerating import diversification away from Hormuz-transiting crude; and (d) fast-tracking the renewable energy transition to structurally reduce crude dependence.

Key Facts & Data

  • India's combined crude stocks: approximately 100 million barrels (SPR + commercial + in-transit)
  • Coverage duration if Hormuz fully blocked: approximately 40–45 days
  • Hormuz-transiting crude imports: ~2.5 million barrels/day (~50% of India's total ~5 million b/d imports)
  • ISPRL strategic reserves alone: 5.33 MMT capacity (~39 million barrels); provides ~9.5 days of emergency coverage
  • SPR locations: Visakhapatnam (1.33 MMT), Mangaluru (1.5 MMT), Padur (2.5 MMT)
  • Hormuz traffic drop (early March 2026): 81% below normal levels
  • IEA standard for SPR: 90 days of net import coverage (India's SPR alone is far short)
  • India's crude import dependence: ~88% of total requirements
  • India's key non-Hormuz sources: Russia (~36%), US (~6–7%), West Africa (~5–7%)
  • Phase 2 SPR expansion planned: Chandikhol (Odisha) + Padur extension; target ~2029–30
  • India's refining capacity: ~250 MTPA — one of the world's largest, but dependent on imported crude feedstock
  • ADNOC (UAE) stores crude in Padur SPR cavern under a fill-and-drawdown commercial agreement