Permitted production volumes for Draugen in June and the second half of this year have been reduced from 3.63 MMbbl to 3.43 MMbbl in total. Integration of the 4D-interpretation results has greatly improved the various Draugen reservoir-simulation models, enabling improved forecast and reserves estimates as well as better business decisions. TRONDHEIM, Norway OKEA has had to cut production from its flagship Draugen field in the Norwegian Sea, due to restrictions imposed last month by Norway’s government in response to low oil prices. Fortunately, the 4D-seismic interpretations have largely compensated for this shortcoming by providing improved lateral control for refining the reservoir-simulation models.Īll of the 4D interpretations conducted so far have indicated the need for simulation-model changes such as modified reservoir volumes in certain areas, revised fault transmissibilities, and improved relative permeability characteristics. The field has a simple geology however, the reservoir structure is relatively uncertain because of the low number of well penetrations for calibrating the structure. Draugen was the first platform north of 62th latitude an important limit politically. Concrete technology that has been developed is also applicable to other geographic areas. High-quality time-lapse seismic surveys conducted in 1990, 1998, 2001, and 2004 have all shown sharp resolution for the areal and vertical definition of the water movement toward the producing wells.Įxcellent reservoir properties with relatively few high-rate wells and an expected recovery factor exceeding 60% make Draugen one of the best performing fields offshore Norway. The Draugen is a concrete platform and has also achieved an international award for its design The Golden Medal Gustav Magnel 1989 - 1994. 4D-seismic interpretation plays a key role in the reservoir management of the Draugen field, situated offshore Norway.
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