What is another word for oilfield?
Pronunciation: [ˈɔ͡ɪlfiːld] (IPA) 
There are several synonyms for the word "oilfield" which can be used interchangeably in technical or general conversations. For instance, the words "prospecting area," "petroleum reserve," and "oil-rich terrain" refer to a region or location where significant deposits of oil can be found. Similarly, terms like "hydrocarbon region," "oil basin," and "oil-producing province" all reference an area that has a significant amount of oil reserves. In the same vein, a "petroleum field," "oil patch," or "oil zone" all represent a region where oil extraction or exploration is a significant commercial activity. Regardless of the synonym used, each of these words denotes a location where natural oil reserves exist.
