InterOil Corporation (InterOil) is an integrated energy company operating in Papua New Guinea and the surrounding Southwest Pacific region. InterOil has four segments. The upstream segment explores, appraises and develops crude oil and natural gas structures in Papua New Guinea. As of December 31, 2011, it was developing infrastructure for the Elk and Antelope fields, which includes condensate stripping and associated facilities, and the gas gathering and associated facilities. The midstream segment produces refined petroleum products at Napa Napa in Port Moresby, Papua New Guinea for the domestic market and for export. It is developing liquefaction and associated facilities in Papua New Guinea for the export of liquefied natural gas. The downstream segment markets and distributes refined products in Papua New Guinea on a wholesale and retail basis. During the year ended December 31, 2011, it acquired an airborne magnetic, gravity and gamma ray survey over PPL 236, PPL 237 and PPL 238.