 Its subsidiaries included its natural gas utility division, Alagasco (Alabama Gas Corporation), which was sold in 2014, and its oil and gas exploration division, Taurus Exploration (later Energen Resources).In 2002, an Energen Resources acquired properties in the Permian Basin for $120 million in cash and $70 million in stock.In 2003, Energen Resources acquired 93 billion cubic feet of gas equivalent of proved reserves in the San Juan Basin of New Mexico and southern Colorado for $39 million.