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Asset class

Oil & Gas Field

OverWatts maps 7,110 oil & gas fields across 91 countries. The United States holds the most — 1,894, 27% of the world total, ahead of Canada (1,165). The largest is Permian Basin.

The largest owner-operators worldwide are Petróleos Mexicanos (167), TotalEnergies SE (149) and Eni SpA (139). Half of the world's oil & gas fields in service predate 1985 (median commissioning year of the 4,551 with a known date), 561 came online in the past decade and the oldest still listed is Baicoi Nord Oil Field (Romania), dating from 1901. 611 more are under construction or proposed, the biggest being Johan Castberg (Barents).

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7,110
Oil & Gas Field
91
Countries
1,894
Most · United States
611
In construction / proposed

Largest oil & gas fields

Biggest owners & operators worldwide

Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.

When they were built

Median commissioning year 1985 · 4,551 of 7,110 carry a start date

Largest under construction & proposed

Oil & Gas Field by country

Frequently asked

How many oil & gas fields are there in the world?
OverWatts maps 7,110 oil & gas fields across 91 countries, from open datasets.
Which country has the most oil & gas fields?
The United States, with 1,894 — 27% of the world total. Then Canada (1,165) and Russia (338).
What is the largest oil & gas field in the world?
Permian Basin, operated by Multiple.
Who owns the most oil & gas fields?
Petróleos Mexicanos is named as owner or operator on 167 of them, ahead of TotalEnergies SE (149), Eni SpA (139) and Shell PLC (119).