 Their father-son partnership was very successful, with Moncrief Oil discovering oil and gas in West Texas, Louisiana, Oklahoma and New Mexico.Their first major post-War success occurred in Scurry County, where the Moncriefs drilled 28 successful wells, which together produced more than 1.2 billion barrels of oil.In 1972, Moncrief acquired one-third of the natural gas field Madden Deep in Wyoming, which proved very profitable.