Crude oil and natural gas reserves are geographically concentrated, but consumption patterns are inverted. Examine the location of major hydrocarbon producers and the chokepoints that link them to consumers.
Subtopic: World Geography · Major Resources — Oil and Gas
How to structure your answer
Introduction: Global oil reserves ~1.57 trillion barrels (BP Statistical Review 2023). Five countries hold ~65% — Venezuela, Saudi Arabia, Iran, Iraq, UAE.
Body — three dimensions: (1) Reserve geography — West Asia (Ghawar field, Saudi Arabia, world's largest), Venezuela's Orinoco belt, Russia's Western Siberia, Permian basin USA. (2) Consumption — USA, China, India top three consumers; demand-supply geographies misaligned. (3) Chokepoints — Strait of Hormuz (21% of world oil), Bab-el-Mandeb, Strait of Malacca (16 million bpd), Suez Canal, Turkish Straits; LNG fleets concentrated on Qatar, Australia, USA exports.
Conclusion: Strategic location of producing fields plus chokepoint vulnerability shapes both Indian energy security and the case for the International North-South Transport Corridor.
Written within the word limit
144 words · target 150 words · 9 min
Introduction: Global proven oil reserves stand at about 1.57 trillion barrels (BP Statistical Review 2023). Five countries — Venezuela, Saudi Arabia, Iran, Iraq and the UAE — hold approximately 65%, with OPEC+ controlling around 80% of reserves and 30% of production.
Body: Reserve geography concentrates in West Asia (Saudi Arabia's Ghawar field, the world's largest conventional reservoir), Venezuela's Orinoco extra-heavy belt, Russia's Western Siberia and the USA's Permian Basin, leader of the shale revolution. Consumption is inverted — the USA, China and India top demand; India imports about 88% of crude (PPAC 2024–25); Russia became India's top supplier in 2023 at around 35% of imports. Chokepoints link these geographies: the Strait of Hormuz carries 21% of world oil, Malacca about 16 million bpd, with Bab-el-Mandeb, Suez and the Turkish Straits completing the lattice. Qatar's North Field is the world's largest gas reserve.
Conclusion: Producer concentration plus chokepoint vulnerability makes the INSTC and strategic petroleum reserves India's energy-security priorities.
What an examiner expects to see
- Global proven oil ~1.57 trillion barrels (BP Statistical Review 2023)
- OPEC+ 13 + 10 members control ~30% production, ~80% reserves
- Ghawar (Saudi Arabia) — world's largest conventional oil field
- Venezuela — largest reserves, Orinoco extra-heavy crude
- Permian Basin (USA) — shale revolution leader
- Strait of Hormuz — 21% of world oil transit
- Strait of Malacca — 16 million bpd
- India imports ~88% of crude (PPAC 2024-25)
- Russia became India's top crude supplier in 2023 (~35% of imports)
Concrete cases, schemes and judgments
- Ghawar field, Saudi Arabia — discovered 1948
- Sakhalin LNG, Russia — Japan's principal supplier
- Bonny Light, Nigeria — historic Indian import
- Qatar North Field — world's largest gas field
- Iran-Pakistan-India gas pipeline — stalled