The Yates Oil Field is a giant oil field in the Permian Basin of west Texas. Primarily in extreme southeastern Pecos County, it also stretches under the Pecos River and partially into Crockett County. Iraan, on the Pecos River and directly adjacent to the field, is the nearest town. The field has produced more than one billion barrels of oil, making it one of the largest in the United States, and in 1998 it remains productive, though at a diminished rate. Since fracking has exploded in the Permian Basin, the Yates field has seen very heavy activity in the past three years. Estimated recoverable reserves are still approximately one billion barrels, which represents approximately 50% of the original oil in place (OOIP).[1][2]