Chilean state-owned company Empresa Nacional del Petróleo (ENAP) focuses on the exploration, extraction, refining and commercialization of hydrocarbons and byproducts. The Santiago-based firm has operations in Chile, Argentina and Egypt. The company has three business units: exploration and production, refining and commercialization, and gas and energy. Enap's subsidiaries include Enap Sipetrol, engaged in the exploration and extraction of oil and natural gas, and Enap Refinerías, focused on the transportation, storing and trading of petroleum products (solvents, bases for asphalt manufacturing, ethylene and other petrochemical products). Both subsidiaries carry out their operations in Chile's southernmost region of Magallanes, where the only petroleum reservoirs in the country are located. Enap Sipetrol manages its parent company international businesses. In Magallanes, the company owns close to 4,000km of gas and oil pipelines and polyducts, and one refinery -Refinería Gregorio in the city of San Gregorio-, while other two refineries are located in other areas of the country: Refinería Bío-Bío in Hualpén, Bío-Bío region, and Refinería Aconcagua, in Concón, Valparaíso region. Enap's products include fuel (LPG, 93- and 97-RON gasoline, kerosene, diesel and fuel oil), petrochemical products (ethylene and propylene) and special products, such as solvents and bases for asphalt manufacturing. In 2015, oil and gas production reached 20.7Mboe. Imported natural gas sales totalized 31.1MBTU. ENAP was founded in 1950.