Energen Corporation is an oil and natural gas exploration and production company. The Company is engaged in the exploration, development and production of oil and natural gas properties and natural gas. Its operations are conducted through subsidiary, Energen Resources Corporation and occur within the Midland Basin, the Delaware Basin and the Central Basin Platform areas of the Permian Basin in west Texas and New Mexico. The Company is focused on increasing its oil, natural gas liquids and natural gas production and proved reserves through active development and/or exploratory programs in the Permian Basin. As of December 31, 2016, oil, natural gas liquids and natural gas represented approximately 60%, 20% and 20% of its reserves. As of December 31, 2016, its development activities added approximately 327 million barrels of oil equivalent (MMBOE) of reserves from the drilling of 623 gross development, exploratory and service wells and 73 well recompletions and pay-adds.