Iran’s natural gas sector is defined by a major imbalance. The country holds one of the world’s largest gas resource bases and ranks among the leading producers, yet it exports only a small share of its output. Most gas is consumed inside Iran by households, power plants, petrochemical facilities, factories, and oil fields. During periods of peak demand, the system can still face shortages.
This is not a problem of insufficient reserves. Iran had an estimated 1,200 trillion cubic feet of proved natural gas reserves at the end of 2023, equal to about 16% of the global total. Dry gas production reached approximately 9.4 trillion cubic feet in 2023 after strong growth over the previous decade. Consumption averaged about 8.9 trillion cubic feet. The narrow gap between production and demand leaves limited room for exports, reinjection into oil fields, storage, and unexpected supply losses.[1]
South Pars Is the Center of Iran’s Gas Economy
Iran’s modern gas expansion has been built around South Pars, the giant offshore field shared with Qatar. Qatar calls its part of the reservoir the North Field. On the Iranian side, South Pars was developed through offshore phases linked by subsea pipelines to processing plants near Asaluyeh on the Persian Gulf coast.
Production from South Pars transformed Iran’s energy system. It allowed natural gas to replace oil products in power generation and buildings, supported petrochemical and fertilizer production, and increased condensate output. The field now supplies most of Iran’s gas, making it essential to the economy and daily energy use.
South Pars Phase 11 began partial production in 2023. Iran expected output from the phase to rise as additional wells and facilities were completed. However, adding new phases does not remove the pressure problem facing older parts of the field. As reservoir pressure declines, gas flows fall unless operators install large offshore compression systems and maintain wells and processing equipment.
Iran has announced major investment in compression to slow this decline. Official estimates cited by the U.S. Energy Information Administration indicated that South Pars output could fall by around 350 billion cubic feet per year before 2030 without sufficient pressure-management investment. Compression platforms for a field of this scale are technically complex and costly. Sanctions restrict access to some foreign equipment, finance, engineering services, and advanced offshore technology, leaving domestic firms responsible for much of the work.[1]
This concentration creates system risk. A technical failure or processing disruption at South Pars or Asaluyeh can affect power generation, industry, household supply, and exports at the same time. Iran has other gas fields, including Kish, North Pars, Farzad, and Belal, but many have developed slowly or remain below their planned potential.
Domestic Demand Absorbs Almost All Production
Iran is one of the world’s largest natural gas consumers. Gas is deeply embedded in the national economy because it is widely available through an extensive pipeline network and sold at heavily subsidized prices. Residential and commercial buildings use large volumes for heating and cooking. Gas-fired power plants dominate electricity generation, while petrochemical plants use gas as both fuel and feedstock.
This creates two seasonal peaks. Household demand rises sharply during cold winters, while electricity demand increases during hot summers. Iran does not have enough storage and flexible supply to manage these changes easily. When household demand surges, authorities may reduce deliveries to factories, petrochemical plants, and power stations. When power plants lack gas, they can switch to diesel or fuel oil, increasing costs and air pollution.
Natural gas accounted for about 85% of Iran’s electricity generation in 2022. Despite the size of the resource base, supply has not always been sufficient to meet peak power demand. Aging generation assets and low energy prices also reduce efficiency. Cheap gas encourages consumption, weakens the case for conservation, and limits revenue available for infrastructure investment.[1]
Gas is also needed for enhanced oil recovery. Iran reinjected about 0.6 trillion cubic feet into oil reservoirs in 2023 to maintain pressure and support crude production. Every unit committed to buildings, power generation, petrochemicals, or exports is therefore unavailable for oil-field reinjection. Gas allocation is part of Iran’s wider petroleum strategy rather than a separate policy issue.
Vast Reserves Have Not Produced a Major LNG Industry
Iran’s location and reserves could support a large export business. It is close to markets in Europe, South Asia, and the Middle East, while its Persian Gulf coast could serve LNG shipping routes. Nevertheless, Iran has no operating commercial LNG export terminal. Projects proposed over several decades were delayed or abandoned because of sanctions, lost foreign partnerships, financing limits, and restricted access to liquefaction technology.
Iran therefore exports gas almost entirely through pipelines to neighboring countries. Iraq and Türkiye have been the largest buyers, while smaller volumes have moved through arrangements involving Armenia, Azerbaijan, and Turkmenistan. In 2023, Iran exported 515 billion cubic feet of gas and imported 80 billion cubic feet. Iraq and Türkiye accounted for 87% of Iranian exports that year.[2]
Pipeline exports are important, but they are less flexible than LNG. Iran cannot easily redirect gas when one customer reduces purchases. Deliveries to Iraq can be affected by payment restrictions, infrastructure limits, and Iran’s own seasonal shortages. Supplies to Türkiye compete with Russian gas, Azerbaijani gas, LNG imports, and Turkish production from the Black Sea.
Iran’s export position is therefore much smaller than its reserve ranking suggests. Qatar developed the shared reservoir into a leading LNG platform, while Iran used South Pars mainly to supply its domestic economy. The difference reflects access to capital, international partners, technology, stable contracts, and large-scale export infrastructure.
Flaring and Processing Losses Reduce Available Supply
Iran also loses substantial volumes through flaring and venting. The EIA estimated that Iran flared or vented about 721 billion cubic feet of gas in 2023, the second-highest volume in the world after Russia. Much of this is associated gas produced at oil fields where gathering and processing systems are incomplete or outdated.[1]
Capturing this gas could improve domestic supply without requiring another giant field. It could provide petrochemical feedstock, fuel power plants, reduce local pollution, and lower greenhouse-gas emissions. Iran has developed natural gas liquids plants and processing projects intended to collect gas from oil fields in Khuzestan and offshore areas. Progress has been uneven because pipelines, compressors, processing units, and downstream customers must all be available together.
Flaring reduction is therefore an infrastructure issue as much as an environmental goal. The same constraints affect underground storage, pipeline maintenance, field compression, and power-sector modernization.
Iran’s Gas Future Depends on Efficiency and Field Management
Iran does not need to prove that it has enough gas underground. Its challenge is turning reserves into reliable and flexible supply. Stabilizing South Pars production is the first priority. Developing other fields can diversify supply, but those projects will require time and investment. Capturing flared gas offers a nearer-term opportunity, while expanded storage could reduce seasonal shortages.
Demand policy is equally important. Greater efficiency in buildings, industry, and power generation could release more gas than some new projects produce. Modern combined-cycle power plants, better insulation, more realistic pricing, and improved industrial equipment would reduce pressure on the system. These changes are difficult because low energy prices are deeply established, but continued demand growth will otherwise absorb most new output.
Iran will remain a major natural gas producer because of South Pars and its wider reserve base. Becoming a major exporter is far less certain. That would require sustained upstream investment, lower domestic waste, better storage, reliable processing infrastructure, and access to export technology and finance. Until those conditions change, Iran’s gas industry will continue to serve the domestic economy first.
