The location of the exact mining for oil remains a top government secret in the U.S. But how does the government keep it a secret? Rumors has it that once oil deposits are found on your land and you report it, the government will then buy the land and you have to swear to keep the location a secret. The reason why the locations are kept a secret is to prevent the rich individuals from purchasing the lands to build their own wells and make big chunks of money from the oil. Thus, the information regarding the location of oil deposits is kept top secret by the U.S government.