What Happened
- The US-Israel conflict with Iran, which began on February 28, 2026 (Operation Epic Fury), entered a dangerous new phase on March 18–19 as Israel struck Iran's South Pars natural gas field — one of the world's largest gas reserves
- Iran retaliated by attacking energy infrastructure across the Gulf, including strikes on Qatar's Ras Laffan LNG hub, disrupting global LNG production and supply
- Qatar suspended LNG production following the Iranian strikes, sending shockwaves through global gas markets
- Brent crude oil prices surged to approximately $110–$115 per barrel; LNG spot prices spiked sharply
- More than 20 oil tankers, cargo ships, and other vessels reported incidents in and around the Persian Gulf, Strait of Hormuz, and Gulf of Oman since the conflict began; tanker traffic at the Strait dropped by approximately 70% at peak disruption
- Iran has selectively allowed passage for some nations' vessels (including Indian-flagged ships) while blocking US, Israeli, and Western-aligned vessels
Static Topic Bridges
South Pars / North Dome Gas Field — World's Largest Natural Gas Reserve
South Pars (Iranian side) / North Dome (Qatari side) is the world's largest natural gas field, straddling the maritime boundary between Iran and Qatar in the Persian Gulf. The field contains an estimated 51 trillion cubic metres of gas and 50 billion barrels of gas condensates — making it uniquely important to both nations' energy sectors and global gas supply.
- Location: Persian Gulf, shared maritime boundary between Iran and Qatar
- Total estimated gas reserves: ~51 trillion cubic metres (~40% of Iran's total gas reserves; ~90% of Qatar's gas reserves)
- South Pars (Iran): 24 development phases; managed by National Iranian Oil Company (NIOC) and its subsidiaries
- North Dome (Qatar): Managed by Qatar Energy (formerly Qatar Petroleum); supplies feedstock for Qatar's LNG trains at Ras Laffan
- Qatar's LNG production capacity: ~77–110 million tonnes per annum (MTPA) — makes Qatar the world's largest or second-largest LNG exporter (alongside Australia)
- Global significance: Qatar's LNG from North Dome supplies Europe, India, Japan, South Korea, and China under long-term contracts
Connection to this news: Israel's strike on South Pars targeted the Iranian portion of this shared field — but Iran's retaliatory strikes on Qatar's Ras Laffan (which processes North Dome gas) effectively weaponised the gas supply chain against Gulf states and global LNG consumers including India.
Persian Gulf Geography — Strategic Waterways and Energy Chokepoints
The Persian Gulf is a shallow, semi-enclosed sea bounded by Iran to the north, Iraq and Kuwait to the northwest, Saudi Arabia and Bahrain to the west, Qatar and the UAE to the south, and Oman to the east. It connects to the Gulf of Oman and the Arabian Sea through the Strait of Hormuz. The region contains the world's largest proven crude oil reserves (~48% of global total) and significant natural gas reserves.
- Persian Gulf dimensions: Approximately 990 km long, 56–338 km wide; average depth ~50 metres
- Key straits and passages:
- Strait of Hormuz: ~20 miles (32 km) wide at narrowest; 2-mile-wide shipping lanes; ~20 million barrels/day oil transit; ~19% of global LNG trade
- Bab-el-Mandeb: Connects Red Sea to Gulf of Aden; separate chokepoint — already disrupted by Houthi attacks since 2023
- Major energy infrastructure in the region:
- Ras Laffan Industrial City (Qatar): World's largest LNG complex
- Ras Tanura (Saudi Arabia): World's largest offshore oil loading facility
- Kharg Island (Iran): Handles ~90% of Iran's crude oil exports
- Jebel Dhanna and Das Island (UAE): Abu Dhabi crude export terminals
- The combination of Strait of Hormuz + Persian Gulf energy infrastructure means a single conflict zone controls ~25–30% of global oil trade and ~20% of LNG trade
Connection to this news: The conflict has simultaneously threatened both the transit chokepoint (Strait of Hormuz) and the production infrastructure (South Pars/Ras Laffan) — a "double disruption" that is unprecedented in scale compared to previous Gulf crises.
Historical Precedents — Tanker Wars and the Weaponisation of Energy Infrastructure
The current conflict echoes the "Tanker War" period of the Iran-Iraq War (1984–1988), when both Iran and Iraq attacked tankers transiting the Persian Gulf to pressure the other side's oil revenues and international support. The US Navy eventually provided convoy escorts (Operation Earnest Will, 1987–1988).
- Iran-Iraq Tanker War (1984–1988): Over 500 vessels attacked; led to US naval engagement under Operation Earnest Will and Operation Praying Mantis (April 1988 — US sank several Iranian naval vessels)
- 1979 Iranian Revolution: Transformed Iran from a key US oil ally to an adversarial state; triggered the first major Gulf energy security crisis
- 1990–91 Gulf War (Operation Desert Storm): Iraq's invasion of Kuwait threatened Saudi oil fields; US-led coalition restored Kuwaiti sovereignty
- International Energy Agency (IEA) Strategic Petroleum Reserve (SPR) system: Established post-1973 to allow coordinated emergency oil releases — IEA member countries maintain ~90 days of import cover
- India's SPR (Indian Strategic Petroleum Reserves Ltd, ISPRL): ~5.33 million metric tonnes at Vizag, Mangalore, Padur — roughly ~9–10 days of consumption cover
Connection to this news: The current conflict is the most serious threat to Gulf energy infrastructure since the Tanker War — and India's limited SPR cover (~10 days vs. IEA's 90-day standard) highlights a strategic vulnerability that the current crisis has exposed.
Iran's Strategic Doctrine — Asymmetric Deterrence and the "Forward Defence" Strategy
Iran's military doctrine is built around asymmetric deterrence — using proxy forces, naval mines, missile strikes, and selective maritime disruption to impose costs on adversaries that outmatch Iran in conventional military power. The Islamic Revolutionary Guard Corps (IRGC), particularly its Navy, controls Iranian operations in the Persian Gulf and Strait of Hormuz.
- IRGC established: 1979 (post-revolution); operates parallel to the regular Iranian Army (Artesh)
- IRGC-Navy: Responsible for Persian Gulf operations; operates fast attack craft, mini-submarines, anti-ship missiles, and mines
- Iran's missile arsenal: Shahab series (ballistic missiles), Fateh series (short-range ballistic), and Soumar (cruise missile) — capable of reaching Saudi, UAE, Qatar, and Israeli targets
- "Axis of Resistance": Iran-backed proxy network including Hezbollah (Lebanon), Hamas (Gaza), Houthi forces (Yemen), and various Iraq-based militias — provides Iran with "forward defence" leverage beyond its borders
- Iran's selective Strait closure policy: Allowing China and India-flagged vessels while blocking Western-aligned ships reflects Iran's strategic interest in maintaining economic relationships with Asian powers
Connection to this news: Iran's escalation to targeting Gulf energy infrastructure — rather than just Strait transit — represents an expansion of its deterrence posture into directly disrupting Gulf state energy production, raising the stakes well beyond previous crises.
Key Facts & Data
- Operation Epic Fury: US-Israel strikes on Iran initiated February 28, 2026
- South Pars/North Dome total reserves: ~51 trillion cubic metres natural gas
- Qatar's LNG production: ~77–110 MTPA (~20% of global LNG supply)
- Brent crude peak (March 18–19, 2026): ~$115/barrel
- Tanker traffic drop at Hormuz: ~70% decline from pre-conflict levels
- Vessels reporting Gulf incidents: 20+ since conflict began
- Strait of Hormuz width: ~20 miles (32 km) at narrowest point
- Daily oil transit through Strait (2025): ~20 million barrels
- LNG transit through Strait: ~19% of global trade
- India's SPR capacity: ~5.33 million metric tonnes (~9–10 days of import cover)
- IEA strategic reserve standard: 90 days of net import cover
- IRGC established: 1979