wildcatter
/ˈwaɪldˌkætər/Definitions
1. noun
A person who explores for oil or gas, especially in the early days of the oil and gas industry, often using untested or unproven methods.
“He was a wildcatter who risked everything to strike it rich in the oil fields.”
2. verb
To explore for oil or gas in a speculative or untested way.
“The company’s new project will wildcat a previously unexplored area of the continent.”