Chief Oil & Gas
| Industry | Petroleum industry | 
|---|---|
| Founded | 1994 | 
| Founder | Trevor Rees-Jones | 
| Defunct | March 9, 2022 | 
| Headquarters | Dallas, Texas, US | 
Chief Oil & Gas was a company involved in hydrocarbon exploration. In March 2022, it was acquired by Expand Energy. It was the second-largest producer in the Barnett Shale.