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The Perth Basin was the original source of natural gas supply to the Perth – Kwinana region, and has produced gas since the early 1970s. Remaining proven and probable reserves of conventional gas are small (estimated by Geoscience Australia in 2011 at about 200 PJ). Since then, additional reserves of about 225 PJ have been identified and brought into production. The Perth Basin has considerable potential for production of unconventional gas (see section 3.5.1). There have been several recent contracts signed for the supply of conventional gas from the Perth Basin. In late 2010, Synergy purchased up to 38 PJ of gas from AWE/Origin over a 7 year term, implying an average flow rate of about 15 TJ/day. Another recent contract for gas in the Perth Basin, announced in January 2012 by Empire Oil and its partners, involves supply of 15 PJ of gas to ALCOA over a 20 year contract term, implying an average delivery rate of around 2 TJ/day. This contract is being met from a new domestic gas and condensate production facility which was commissioned during 2013, processing raw gas from the Red Gully and Gin Gin fields, north of Perth. The Red Gully processing facility has an initial capacity of about 10 TJ/d, expandable to about 20 TJ/d7 .