Major Natural Gas Reserves in the World & India

Major Natural Gas Reserves in the World & India

General Studies Paper III: Environmental Pollution & Degradation

Natural Gas is one of the most important fossil fuels. Its global reserves are geographically concentrated, shaping global energy security, geopolitics and trade.

What is Natural Gas?

About: Natural gas is a fossil fuel and naturally occurring gaseous hydrocarbon mixture, found mainly in underground geological formations.
- Its principal component is methane (CH₄), accompanied by smaller quantities of ethane, propane, butane, and non-hydrocarbon gases such as carbon dioxide, nitrogen and water vapour.
Formation: Natural gas originates primarily from ancient organic matter buried beneath sediments and subjected to high temperature and pressure over geological timescales.
- It may occur with crude oil (associated gas) or independently in gas-bearing formations (non-associated gas).
- Conventional gas generally accumulates where migrating hydrocarbons become trapped beneath an impermeable geological seal.
Sources: Natural gas resources include conventional gas, shale gas, coal-bed methane (CBM) and tight gas.
- Shale gas and tight gas are generally considered unconventional resources because extraction requires specialised techniques.
- CBM is methane occurring within coal seams.
- Gas can also be classified as associated or non-associated, depending on its relationship with petroleum deposits.
Processing: Raw natural gas requires processing to remove water, carbon dioxide, hydrogen sulphide and other impurities and to separate valuable natural-gas liquids.
- For long-distance transport, it can be converted into Liquefied Natural Gas (LNG) by cooling it to approximately −162°C, reducing its volume substantially.
- For vehicle use, it can be compressed as Compressed Natural Gas (CNG).
Uses: Natural gas is used for electricity generation, fertiliser production, industrial heating, petrochemicals, household cooking and transport.
- It is particularly important for the fertiliser sector, where gas is a major feedstock for ammonia and urea production.
  - Natural gas is traded by calorific value rather than volume, with sales measured in MMBTUs. One MMBTU roughly equals 1,000 cubic feet of gas.
Environmental Significance: Natural gas generally produces less CO₂ per unit of energy than coal when combusted, making it potentially useful in the energy transition.
- However, it remains a fossil fuel, and methane leakage during production, processing and transportation is a major environmental concern because methane is a highly potent greenhouse gas.
- The IEA estimates that natural-gas activities accounted for about 34 Mt of methane emissions in 2025.

Global Distribution of Natural Gas Reserves

Global Reserve: Global proven natural gas reserves stand at roughly 7,300 to 7,700 trillion cubic feet (Tcf). These reserves are highly concentrated, with the top 10 countries controlling approximately 83% of the world’s total supply.
Regional Distribution: The global geographic distribution of natural gas is highly asymmetric:
- Middle East and Eurasia hold a massive share of conventional gas resources.
  - The Middle East’s dominance is anchored by giant offshore structures, while Eurasia relies heavily on terrestrial Siberian basins.
- In Europe, Dutch coast and the North Sea (off the coast of Norway) have proven reserves.
- North America has experienced massive growth over the last two decades. This is primarily driven by advanced extraction technology in shale formations.
- Africa and Latin America contain highly localized, under-explored hotspots that are structurally important for regional energy dynamics.
- The largest gas field in Asia is in the North Sumatra basin of Indonesia.
Proven Reserves: Proven reserves are the estimated quantities of natural gas that companies can recover with high certainty using today’s technology and market prices. Top countries:
- Russia (~1,688 Tcf): Holds the world’s largest national stockpile. Most deposits are concentrated across the West Siberian Basin and the Yamal Peninsula.
- Iran (~1,200 Tcf): Possesses the second-largest reserves. It holds a dominant share of the giant offshore South Pars field in the Persian Gulf.
  - On August 23, 2026, Iranian Oil Minister Mohsen Paknejad announced a major natural gas discovery containing over 7.5 trillion cubic feet (Tcf) in the southern Fars Province.
- Qatar (~843 Tcf): Controls the North Field (the contiguous extension of South Pars). This positioning fuels its status as a premier Liquefied Natural Gas (LNG) global exporter.
- United States (~603–615 Tcf): Fueled by the shale revolution. Notable fields include the Marcellus, Permian, and Haynesville formations, transforming the nation into a top global supplier.
- Saudi Arabia (~336 Tcf): Reserves are historically distributed across associated gas fields (found alongside crude oil), though unconventional gas development is accelerating.
- Turkmenistan (~265 Tcf): Home to the massive Galkynysh gas field, primarily exporting via dedicated pipeline infrastructure eastward to China.
- United Arab Emirates (~215 Tcf): Features significant associated reservoirs and recent massive shallow-water discoveries between Dubai and Abu Dhabi.
- Venezuela (~201 Tcf): Boasts the largest reserves in Latin America, mostly associated with its heavy oil belts.
- Nigeria (~187 Tcf): Represents the largest gas province in Africa, centered around the Niger Delta basin.
Natural Gas Fields: A natural gas field is an underground area containing a large accumulation of hydrocarbon-rich natural gas. Major Natural Gas Fields:
- South Pars / North Dome (Iran and Qatar): Holds roughly 1,230 to 1,800 trillion cubic feet (Tcf) of recoverable gas in the Persian Gulf.
- Urengoy (Russia): Located in Siberia, it is the largest onshore natural gas field globally with about 222 Tcf.
- Yamburg (Russia): Also situated in West Siberia, holding an estimated 138 Tcf.
- Bovanenkovo (Russia): Found on the Yamal Peninsula, containing roughly 140 Tcf.
- Hassi R’Mel (Algeria): The largest gas field in Africa, located in the Sahara Desert with about 123 Tcf.
- Galkynysh (Turkmenistan): A supergiant onshore field holding an estimated 98 to 200 Tcf.
Leading Producers:
- United States: The world’s top producer, driven by advanced shale extraction and fracking.
- Russia: A top global producer and historical pipeline supplier to neighboring regions.
- Iran and China: Large producers scaling output to satisfy growing domestic energy needs.
- Qatar and Australia: Major global exporters of liquefied natural gas.

Natural Gas Reserves and Fields in India

Resource Base: India possesses substantial but unevenly distributed recoverable natural-gas resources.
- The Government of India has reported 1,138.6 billion cubic metres (BCM) of recoverable natural gas within the country’s sedimentary basins.
- India’s gas production has an important offshore component.
- India holds approximately 40 Trillion Cubic Feet (Tcf) of proven natural gas reserves, accounting for roughly 0.5% to 0.7% of the total global share.
- This volume positions India 23rd globally in terms of proven reserves.
Geographical Distribution: India’s gas occurrences are closely associated with its sedimentary basins, both onshore and offshore.
- DGH has mapped and assessed 26 sedimentary basins, covering approximately 50% of India’s onland area and 73% of its offshore area within the EEZ.
- Major producing/prospective regions are Mumbai Offshore, Krishna-Godavari, Assam-Arakan, Cambay, Cauvery and Rajasthan.

Major Fields:
- Mumbai Offshore Basin: One of India’s most important hydrocarbon provinces; major offshore fields include Bassein & Satellite (B&S), with ONGC being a major operator.
  - In FY 2024-25, Mumbai Basin contributed 14.463 BCM of ONGC gas production, making it the largest gas-producing basin in ONGC’s nomination portfolio.
- Krishna-Godavari (KG) Basin: Located mainly along the Andhra Pradesh coast and offshore Bay of Bengal, it contains important gas discoveries, including KG-DWN-98/3 (KG-D6) operated by Reliance Industries/BP.
  - ONGC also produced 0.975 BCM from the basin in FY 2024-25.
- Assam-Arakan Basin: Northeastern India’s historic petroleum province, particularly important around Assam. OIL and ONGC remain significant producers; OIL produced 2.972 BCM from the Assam-Arakan Shelf in FY 2024-25.
- Cambay Basin: Primarily spread across Gujarat, it is one of India’s established onshore hydrocarbon provinces. ONGC produced 0.810 BCM of gas from Cambay in FY 2024-25.
- Cauvery Basin: Extends across parts of Tamil Nadu and adjoining offshore areas, with both conventional exploration and offshore prospects.
- Rajasthan Basin: Primarily known for oil production but also contributes natural gas; private operators produced 1.544 BCM in FY 2024-25.
Exploration The Government has targeted expansion of exploration acreage to 1 million sq km by 2030.
- Under Open Acreage Licensing Policy (OALP), new blocks are being offered across basins including Krishna-Godavari, Mumbai Offshore, Cauvery, Mahanadi, Andaman-Nicobar, Bengal-Purnea and Saurashtra.
- Oil India Limited (OIL) reported a new natural-gas discovery in the Dandewala Field of Rajasthan in May 2026.
  - Preliminary geological and petrophysical assessment estimated Gas In Place (GIP) at approximately 75 million standard cubic metres (MMSCM).
- State-owned Oil India Limited discovered natural gas at the Shri Vijayapuram-3 (Sri Vijayapuram-3) exploratory well, Andaman Sea Offshore.
Importance:
- Natural gas is important for diversifying India’s energy basket, which remains heavily dependent on coal and oil.
  - The Government aims to increase natural gas’s share in the primary energy mix from about 6.7% to 15% by 2030, supporting the transition towards a gas-based economy.
- The fertiliser sector is India’s largest natural-gas consuming sector.
  - Gas is an essential feedstock for ammonia and urea production, linking natural-gas availability directly with fertiliser production, agricultural productivity and food security.
  - PPAC data for April–February 2024-25 shows fertiliser accounting for approximately 32% of natural-gas consumption.
- Natural gas supports electricity generation and provides a flexible fuel for balancing variable renewable generation.
  - It is also used extensively in refineries, petrochemicals, chemicals, ceramics, glass, metals and other industries.
  - In April–February 2024-25, the power sector accounted for about 14% of gas consumption, while refineries accounted for around 9%.
- Through CNG, natural gas provides an important alternative fuel for road transport, while PNG supplies households and commercial establishments.
  - Expansion of the City Gas Distribution (CGD) network therefore supports cleaner urban fuel use and reduced dependence on conventional petroleum fuels.
- India is developing a nationwide Natural Gas Grid, LNG infrastructure and CGD networks to improve availability and create an integrated gas market.
  - The Government has also pursued Unified Pipeline Tariff, designed around the principle of “One Nation, One Grid and One Tariff.”
- Natural gas is strategically important precisely because India has limited domestic availability relative to demand.
  - LNG imports therefore remain important for meeting consumption, making India vulnerable to international gas prices, shipping costs, geopolitical disruptions and exchange-rate movements.
  - Expanding domestic exploration, unconventional gas, biogas/CBG and infrastructure can strengthen energy security.

Frequently Asked Questions (FAQs):

1. What are the largest natural gas reserves in the world?

The largest proved reserves are concentrated in Russia, Iran, Qatar, Turkmenistan, the United States, Saudi Arabia and UAE.

2. Which country has the largest natural gas reserves?

Russia has the world’s largest proven natural-gas reserves, ahead of Iran and Qatar.

3. Which are the major natural gas fields in the world?

Major fields include South Pars/North Dome, Urengoy, Yamburg, Bovanenkovskoye, Galkynysh, Hassi R’Mel and Zohr.

4. What is the largest natural gas field in the world?

South Pars/North Dome, shared by Iran and Qatar beneath the Persian Gulf, is the world’s largest natural-gas field.

5. Which countries have the biggest natural gas reserves?

The leading countries are Russia, Iran, Qatar, Turkmenistan, United States, Saudi Arabia, UAE, Nigeria, Venezuela and Algeria.

6. What are the major gas fields in Russia?

Russia’s major fields include Urengoy, Yamburg, Bovanenkovskoye, Zapolyarnoye, Medvezhye, Yamal fields and Shtokman.

Disclaimer: Information in this article is based on official announcements and public records. Regulations and implementation details may evolve over time.