The phrase "oil patch" refers to an area or region where there are a lot of oil wells and oil production activities taking place. It is used to describe an area specifically known for its oil industry. Full definition
But an extended period of oil prices at recent levels is unlikely to lead to greater investment spending in the Canadian oil patch. (bankofcanada.ca)
Many are men and women from coal country and oil patch states who built their platforms on promises to encourage the use of fossil fuels. (insideclimatenews.org)
To be honest, I was quite surprised to find several oil patch companies offering raises at this time. (divhut.com)