Iran energy profile
Iran — vast reserves, sanctions, and an active conflict
~12%
Share of world oil reserves — 3rd-largest
~3.5 M bbl/day
2024 production (NIOC), pre-conflict baseline
1,800 Tcf
South Pars/North Dome — world's largest gas field
~20%
Of world oil transits the Strait of Hormuz
Reserves, sanctions, and South Pars
A vast resource base, constrained for most of the last decade
Oil — large reserves, sanctioned exports:
Iran's proven oil reserves rank third globally (estimates range from roughly 157.5 to 209 billion barrels depending on source and methodology), concentrated in the Ahvaz field (about 23% of national reserves) and other fields in Khuzestan province. Iran was producing close to 6 million bbl/day before the 1979 revolution but has never sustained that level since, due to the Iran-Iraq War, natural field decline (roughly 8-10% a year without intervention), and — since 2018, when the US withdrew from the JCPOA nuclear deal and reimposed sanctions — sharply restricted access to foreign investment, technology, and export markets. China became Iran's dominant crude buyer as Western buyers exited.
Iran's proven oil reserves rank third globally (estimates range from roughly 157.5 to 209 billion barrels depending on source and methodology), concentrated in the Ahvaz field (about 23% of national reserves) and other fields in Khuzestan province. Iran was producing close to 6 million bbl/day before the 1979 revolution but has never sustained that level since, due to the Iran-Iraq War, natural field decline (roughly 8-10% a year without intervention), and — since 2018, when the US withdrew from the JCPOA nuclear deal and reimposed sanctions — sharply restricted access to foreign investment, technology, and export markets. China became Iran's dominant crude buyer as Western buyers exited.
South Pars — the world's largest gas field:
Iran shares South Pars (called North Dome on the Qatari side) with Qatar — together the largest natural gas field on Earth, holding an estimated 1,800 trillion cubic feet of usable gas. Iran's share alone accounts for roughly half its domestic gas reserves. Discovered in 1990 and developed across 24 phases, most are now operational, but sanctions have prevented Iran from building the large-scale LNG export infrastructure Qatar developed from the same reservoir — meaning most South Pars gas produced on the Iranian side stays inside the country (roughly 94% of Iran's total gas production is domestically consumed) rather than being exported and monetised at scale.
Iran shares South Pars (called North Dome on the Qatari side) with Qatar — together the largest natural gas field on Earth, holding an estimated 1,800 trillion cubic feet of usable gas. Iran's share alone accounts for roughly half its domestic gas reserves. Discovered in 1990 and developed across 24 phases, most are now operational, but sanctions have prevented Iran from building the large-scale LNG export infrastructure Qatar developed from the same reservoir — meaning most South Pars gas produced on the Iranian side stays inside the country (roughly 94% of Iran's total gas production is domestically consumed) rather than being exported and monetised at scale.
The 2026 conflict — extremely fluid
An active situation directly affecting the Strait of Hormuz
This section describes an active, fast-changing conflict. It reflects reporting current to early-mid July 2026 and will be out of date quickly — check current news for anything more recent. Casualty figures, ceasefire status, and sanctions status are all in flux.
What has happened:
In 2026, Iran and Israel — with US military involvement — fought an armed conflict that multiple news organisations reported resulted in the death of Iran's Supreme Leader, Ayatollah Ali Khamenei, in strikes attributed to the US and Israel. His funeral was held in early July 2026. An interim ceasefire and a US-Iran understanding (reported as the "Islamabad Memorandum of Understanding") followed, alongside a temporary US license permitting some Iranian oil sales and calling for technical talks on Iran's nuclear programme and sanctions relief. That arrangement has proven fragile: in early July 2026, multiple tankers were struck in the Strait of Hormuz, and the US responded by revoking its oil-sale waiver for Iran and conducting further strikes, with both sides describing the other's actions as violations of the ceasefire understanding.
In 2026, Iran and Israel — with US military involvement — fought an armed conflict that multiple news organisations reported resulted in the death of Iran's Supreme Leader, Ayatollah Ali Khamenei, in strikes attributed to the US and Israel. His funeral was held in early July 2026. An interim ceasefire and a US-Iran understanding (reported as the "Islamabad Memorandum of Understanding") followed, alongside a temporary US license permitting some Iranian oil sales and calling for technical talks on Iran's nuclear programme and sanctions relief. That arrangement has proven fragile: in early July 2026, multiple tankers were struck in the Strait of Hormuz, and the US responded by revoking its oil-sale waiver for Iran and conducting further strikes, with both sides describing the other's actions as violations of the ceasefire understanding.
Why it matters for global energy:
The Strait of Hormuz is the world's single most important oil chokepoint — roughly a fifth of global oil consumption transits it, alongside significant LNG volumes from Qatar and others. Attacks on tankers there, or a serious disruption to transit, have outsized effects on global oil prices even at relatively low volumes, since insurers and shippers respond to risk broadly rather than to individual incidents. Oil prices moved on the July 2026 tanker attacks, though as of that reporting they remained well below the peaks reached during the more intense phase of the conflict earlier in the year. Iran's own oil exports — and the broader sanctions regime governing them — are being renegotiated in real time as part of the wider conflict, making any specific production or export figure for Iran in 2026 a snapshot rather than a stable baseline.
The Strait of Hormuz is the world's single most important oil chokepoint — roughly a fifth of global oil consumption transits it, alongside significant LNG volumes from Qatar and others. Attacks on tankers there, or a serious disruption to transit, have outsized effects on global oil prices even at relatively low volumes, since insurers and shippers respond to risk broadly rather than to individual incidents. Oil prices moved on the July 2026 tanker attacks, though as of that reporting they remained well below the peaks reached during the more intense phase of the conflict earlier in the year. Iran's own oil exports — and the broader sanctions regime governing them — are being renegotiated in real time as part of the wider conflict, making any specific production or export figure for Iran in 2026 a snapshot rather than a stable baseline.
Questions
Questions about Iranian energy
Why does the Strait of Hormuz matter so much for global energy, and what happens to oil prices when it's disrupted?
The Strait of Hormuz is a narrow waterway between Iran and Oman that is the only sea route out of the Persian Gulf — and roughly a fifth of the world's oil, plus a large share of the world's LNG (mostly Qatar's), has no other way to reach open water. That makes it the single most consequential chokepoint in global energy: unlike most oil infrastructure, which can often be rerouted with enough time and cost, there is no practical alternative sea route for Gulf producers if the strait is seriously blocked. In practice, full closure is rare and difficult to sustain, because Iran itself depends on the strait for its own oil exports. What happens more often — including in 2026 — is partial disruption: attacks or threats against individual tankers, which raise insurance costs and risk premiums for all shipping in the area even though most vessels transit safely. Markets tend to price in this broad risk rather than reacting only to confirmed losses, which is why oil prices can jump on a handful of tanker incidents even when overall supply hasn't meaningfully changed. Source: multiple 2026 news reports on Strait of Hormuz tanker attacks (Reuters, AP, PBS, CNBC); general chokepoint analysis from EIA and IEA.
Provenance
Attribution and citation
- Sources
- US EIA Country Analysis Brief: Iran · Energy Institute Statistical Review 2024 · National Iranian Oil Company (NIOC) · Reuters · AP · PBS News · Washington Times · Wikipedia
- Cite as
- "Iran Energy Profile — Complete Reference", The Energy Codex, https://thecodex.expert/energy/countries/iran/, last updated .