On 19 May 2013, Det norske started production on the Jette field, the first oil produced by Det norske as operator. The start-up of production represents a milestone for the company, and the field is expected to yield between 6 000 and 7 000 barrels of oil per day to Det norske.
Jette was discovered in 2009 and is one of the smaller oil fields in the North Sea. Even though the volumes in Jette are small, they nevertheless represent great value for the companies and for the Norwegian society. The authorities have been encouraging exploration and development in areas where the lifetime of existing infrastructure is limited. The resources from Jette had not been possible to produce if the Jotun field installations did not have the capacity to receive oil and gas from Jette for processing and further transport.
The development concept In February 2012, the Norwegian authorities approved the Plan for Development and Operation (PDO) of Jette. The field has been developed with a subsea installation tied back to the Jotun B platform. The Jotun installations consist of a floating production facility with storage and offloading facilities (Jotun A), and a wellhead platform (Jotun B).
A number of modifications to Jotun B, in addition to minor modifications on Jotun A, were required in order to tie the two fields together. The chosen development concept enables future tie-up to additional wells. The well stream from Jette is mixed with the well stream from Jotun on Jotun B, and transported to Jotun A for further processing, storage and export.
Challenging drilling operation The drilling of the production wells on Jette commenced in February 2012 and was completed in November. The well completion and installation of equipment on the seabed posed certain challenges. One of the two production wells collapsed during the drilling operation, resulting in the implementation of a new drilling plan. The adjustment entailed a significant increase of development costs, and the modified well path resulted in a reduction of the recoverable volume.
First self-produced oil Production from one of the two wells on the Jette field commenced 19 May 2013. Based on a recovery rate of 30 percent, the field contains between six and seven million barrels of oil equivalents. Jette is expected to yield between 6 000 and 7 000 barrels of oil per day to Det norske. Det norske holds a 70 percent interest in the field. Jette is being operated from Trondheim.