oil field
Refers to an area or deposit from which petroleum can be extracted; common in news, energy, and geography contexts.
A new oil field was discovered offshore.
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.