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Brunei Darussalam Resource Reserves (2026)

1980

2021

Source: U.S. Energy Information Administration · Updated June 2026

1980

2021

What to know

As of 2021, natural gas led Brunei's reserve mix at 9.200 trillion cubic feet. It also held 1.100 billion barrels of oil. Over the last decade, gas reserves declined significantly (-33%).

Key reserves

Oil reserves (2021)

1.10 B bbl

Natural gas reserves (2021)

9.20 TCF

Key terms

Proved reserves: — Quantities of crude oil or natural gas that geological and engineering data demonstrate with reasonable certainty are recoverable under existing economic and operating conditions.
Recoverable reserves: — Coal that can be technically and economically extracted with current mining methods at current prices. Excludes inaccessible deposits.
Billion barrels (B bbl): — Unit for oil reserves. One barrel equals 42 US gallons or about 159 litres.
Trillion cubic feet (TCF): — Unit for natural gas reserves. One TCF is roughly 28.3 billion cubic metres.
Million short tons (M ST): — Unit for coal reserves. One short ton equals 2,000 lb or 907 kg.

Crude oil proved reserves

In 2021, Brunei had 1.100 billion barrels of proved crude oil reserves. Over the prior decade, those reserves held roughly steady.

Natural gas proved reserves

In 2021, Brunei held 9.200 trillion cubic feet of proved natural gas reserves. Reserves declined significantly over the prior decade (-33%).

The bottom line

Brunei's reserve base was built around natural gas, the cleaner-burning of the fossil fuels. Reserve estimates had trended lower, reflecting extraction outpacing new discoveries.

Source: U.S. Energy Information Administration · Updated June 2026

What to know

As of 2021, natural gas led Brunei's reserve mix at 9.200 trillion cubic feet. It also held 1.100 billion barrels of oil. Over the last decade, gas reserves declined significantly (-33%).

Key reserves

Oil reserves (2021)

1.10 B bbl

Natural gas reserves (2021)

9.20 TCF

Key terms

Proved reserves: — Quantities of crude oil or natural gas that geological and engineering data demonstrate with reasonable certainty are recoverable under existing economic and operating conditions.
Recoverable reserves: — Coal that can be technically and economically extracted with current mining methods at current prices. Excludes inaccessible deposits.
Billion barrels (B bbl): — Unit for oil reserves. One barrel equals 42 US gallons or about 159 litres.
Trillion cubic feet (TCF): — Unit for natural gas reserves. One TCF is roughly 28.3 billion cubic metres.
Million short tons (M ST): — Unit for coal reserves. One short ton equals 2,000 lb or 907 kg.

Crude oil proved reserves

In 2021, Brunei had 1.100 billion barrels of proved crude oil reserves. Over the prior decade, those reserves held roughly steady.

Natural gas proved reserves

In 2021, Brunei held 9.200 trillion cubic feet of proved natural gas reserves. Reserves declined significantly over the prior decade (-33%).

The bottom line

Brunei's reserve base was built around natural gas, the cleaner-burning of the fossil fuels. Reserve estimates had trended lower, reflecting extraction outpacing new discoveries.

Brunei Darussalam Resource Reserves (2026)

Brunei Darussalam Resource Reserves (2026)

Malaysia

Suriname

Montenegro

Western Sahara

Malta

Maldives

Cabo Verde

Belize

Bahamas

Iceland

Guadeloupe

Mayotte

Vanuatu

What to know

Key reserves

Crude oil proved reserves

Natural gas proved reserves

The bottom line

Malaysia

Suriname

Montenegro

Western Sahara

Malta

Maldives

Cabo Verde

Belize

Bahamas

Iceland

Guadeloupe

Mayotte

Vanuatu

What to know

Key reserves

Crude oil proved reserves

Natural gas proved reserves

The bottom line