doodlebugger

Noun

 * 1)  A dowser searching for subterranean natural resources such as water or oil.
 * 2) * 1963, December 7, William Trombley, “The dowser who finds oil wells”, The Saturday Evening Post, issue 43, page 88:
 * This was a "doodlebugger," a man who searches for oil with divining rods of wondrous shapes and descriptions. And not just any doodlebugger, but one of the hottest noses in the amateur oil-sniffing game&thinsp;– Walter J. Nelson.
 * 1)  A geophysicist working in the field to explore oil or other natural resources.