This approach raises the statistical recovery factor to 35-45%. By doing this, the reservoir pressure was maintained while also pushing the oil towards the middle of the field, where the platform is located. We installed water injectors at each end of a long and fairly narrow field. This key decision was already in Draugen’s Plan for Development and Operation (PDO), submitted in 1988. Our first step was to add pressure support. We therefore implemented an active reservoir management strategy. By natural underground pressure, the statistical recovery rate is expected to be only 5-15%. However, the good reservoir quality is not the only reason why Draugen has achieved such a high recovery rate.
We are in the lead in Norway when it comes to extracting the maximum amount of oil out of a reservoir. The average recovery factor in Norway is 46%. Today the recovery is multiplied by four, now getting close to 70%. We assumed a recovery factor which seemed realistic at the time, in the late 1980s: about 17% of the oil would be produced. The producing formation had excellent characteristics. Oil from Haltenbanken had migrated eastwards and up, and Draugen was discovered at a shallower level than the other reservoirs in the area. Draugen was expected to reach end of field life in 2013, according to the initial plans, but we are currently in the process of extending Draugen’s lifetime till 2036.ĭraugen was discovered in 1984, in an area where most geologists did not bother looking for hydrocarbon-bearing reservoirs. In 2013, Draugen marks 20 years since the start of production. The long and winding road to SEMS complianceĭraugen was the first field to be developed in the Norwegian Sea, pioneering production from an area which later became one of the important petroleum provinces in Norway.Kursk tragedy inspires deep-sea diving system design.Rystad assesses global skills challenge.Design detail - Huisman’s dual multipurpose tower.Real time micelle detection in development.Umbilicals bring new production to China’s Liuhua field.
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