Edward L. Doheny prices were high. The Mexican Petroleum Company was the largest in Mexico, and Mexico was the largest oil producer in the world. In 1922 Albert B. Fall, U.S. Secretary of the Interior, leased the oil field at Elk Hills, California, to the Pan American Petroleum & Transport Company. Around the same time, the Teapot Dome Field in Wyoming was leased to Sinclair Consolidated Oil Corporation. Both oilfields were part of the US Navy's petroleum reserves. Neither lease was subject to competitive bidding. In 1924 rumors about corruption in the deals escalated into the Teapot Dome scandal. Doheny's reputation was somewhat
Oil production and smuggling in ISIL to produce oil from those oil fields it controls. Estimates of the income ISIL derived from its oil operations vary. In 2014, Dubai-based energy analysts put the combined oil revenue from ISIL's Iraqi-Syrian production as high as US$3 million per day. An estimate from October 2015 indicated the production to be about 34,000-40,000 bpd that was sold at US$20–45 at the wellhead generating an income of US$1.5 million per day. Another 2015 estimate sets the monthly income as high as US$40 million. Various other reports indicated in 2015 that ISIS obtained 1.1 to 1.5 million dollars a day from selling