World’s biggest LNG firm, Qatargas today entered into a 22-year long sale and purchase agreement (SPA) with PetroChina’s international arm, PetroChina International Company Limited. The agreement requires Qatargas to supply China with around 3.4 million tonnes of liquefied natural gas (LNG) per annum. LNG will be supplied from the the Qatargas 2 project, which is a joint venture between ExxonMobil, Qatar Petroleum and Total.