Stone Energy is an independent oil and natural gas company engaged in the acquisition, exploration, exploitation, development and operation of oil and gas properties. Co. operates in Gulf of Mexico (the GOM) conventional shelf and the basins of the GOM deep water, Gulf Coast deep gas and the Marcellus and Utica shales in Appalachia. As of Dec 31 2016, Co.'s estimated proved reserves for oil, natural gas liquids, and natural gas were 23.3 million barrels, 10.6 million barrels, and 117.32 billion cubic feet, respectively, amounting to total oil, natural gas, and natural gas liquids reserve of 320.77 billion cubic feet of gas equivalent.