oil field
Refers to an area or deposit from which petroleum can be extracted; common in news, energy, and geography contexts.
沖合で新しい油田が発見された。
A new oil field was discovered offshore.
この国は大きな油田を持っている。
This country has large oil fields.
A new oil field was discovered in the North Sea.
The country is proceeding with plans to develop the offshore oil field.
It is said that this oil field will run dry in another ten years.
The company obtained permission to drill a new oil field.