Energen Corp is an exploration and production company focused on the exploration, development, and production of oil, natural gas liquids, and natural gas. Its core business is centered around increasing production and adding proven reserves. In addition, the company explores for and develops new reservoirs, primarily in areas which it has an existing presence. Traditionally, all of the oil, natural gas liquids, and natural gas is sold to third parties. Energen has expanded proven reserves from regulatory approvals for drilling unit downspacing. This approval increases the number of available drilling locations, changes the operating environments, technology enhancements, and increases knowledge of field geology and engineering parameters relative to oil and natural gas reservoirs.