oilfield
noun
- region where petroleum is extracted from the ground
adjective
- pertaining to an oilfield
Wiktionary
noun
- Alternative spelling of oil field.
“Conoco on Monday announced a $9.7 billion all-stock takeover of Concho Resources (CXO), a fracker squarely focused on the Permian Basin, the massive West Texas oilfield at the heart of the shale revolution.”