The Heidrun platform in the Norwegian Sea shipped its oil cargo no. 1000 on 7 August. Heidrun's oil production to date has already exceeded the total volume expected to be produced through the field life. The Heidrun platform came on stream on 18 October 1995. When the plan for development and operation (PDO) was submitted to the authorities four years earlier, the estimated production from the field was slightly more than 750 million barrels of oil. When cargo number one thousand was shipped, the field had delivered almost 820 million barrels.