The first major gas project was the PNG LNG joint venture. ExxonMobil is operator of the joint venture, also comprising PNG company Oil Search, Santos, Kumul Petroleum Holdings (Papua New Guinea's national oil and gas company), JX Nippon Oil and Gas Exploration, the PNG government's Mineral Resources Development Company and Petromin PNG Holdings. The project is an integrated development that includes gas production and processing facilities in the Hela, Southern Highlands and Western Provinces of Papua New Guinea, including liquefaction and storage facilities (located northwest of Port Moresby) with capacity of 6.9 million tonnes per year. There are over  of pipelines connecting the facilities. It is the largest private-sector investment in the history of PNG. A second major project is based on initial rights held by the French oil and gas major Total S.A. and the U.S. company InterOil Corp.  (IOC), which have partly combined their assets after Total agreed in December 2013 to purchase 61.3% of IOC's Antelope and Elk gas field rights, with the plan to develop them starting in 2016, including the construction of a liquefaction plant to allow export of LNG. Total S.A. has separately another joint operating agreement with Oil Search .