Natural gas from the Heidrun field is delivered in part through the Åsgard Transport system to Kårstø, and in part through the Haltenpipe gasline to Tjeldbergodden. A methanol plant built by Statoil and ConocoPhilips is located near the gas terminal at Tjeldbergodden. The annual delivery of Heidrun gas to the methanol plant is approximately 700 million cubic metres. The methanol plant initiated production in June 1997. Gas is also delivered to a nearby gas fractionation and liquefaction plant, which has an annual capacity of 35 million cubic metres. The total recoverable gas reserves at the Heidrun field has been estimated to be 41.6 billion cubic metres, while the estimated remaining amount as of 31 December 2008 was 30.1 billion cubic metres.