Det norske completes two Ivar Aasen appraisal wells (Norway)

Maersk Interceptor at Ivar Aasen
Maersk Interceptor at Ivar Aasen

Det norske oljeselskap AS, operator of production licence 001 B, has completed drilling of appraisal wells 16/1-21 S and 16/1-21 A on the Ivar Aasen field, in the North Sea. 

The field is located in the central part of the North Sea and was proven in 2008. The size of the field prior to drilling of these two appraisal wells was 24 million standard cubic metres (Sm3) of recoverable oil, 1 million Sm3 of recoverable condensate and 4.5 billion Sm3 of recoverable gas.

The primary target of the wells 16/1-21 S and 16/1-21 A, was to investigate reservoir rocks and the reservoir quality, in addition, the extension of an overlying gas cap in the eastern part of the field.

According to Det norske, well 16/1-21 S encountered a total oil column of 54 meters, of which 25 meters of good to very good reservoir quality in the Skagerrak formation. Gas was not encountered in the well. In the Heimdal formation, the well encountered 27 meters of water filled sandstone of good to very good quality.

Well 16/1-21 A encountered a total oil column of 41 meters and a gas column of 4 meters, of which a total of 29 meters of very good reservoir quality in the Sleipner and Skagerrak Formation. The oil/water contact was not encountered.

“We are very pleased with the operation, and the result. This was Maersk Interceptor’s first well, and the operation were carried out according to plan. The operation has given us a greater understanding of the field, and the results will be used in the efforts to determine the final location of the production- and injection wells,” says Tor-Ole Jøssund, Subsurface Manager Ivar Aasen

The wells have been permanently plugged and abandoned. Water depth at the site is 113 metres.

Drilling on the Ivar Aasen field is carried out with the drilling rig Maersk Interceptor, the world’s largest jack-up rig. Interceptor arrived in Norway in October 2014, and these two wells were the rig’s first operation. Det norske has a contract with the rig for five years, with an option for two years.

Ivar Aasen field will be developed with a total of 15 wells, respectively eight production wells and seven water injection wells. The rig will now continue drilling at Ivar Aasen field, with appraisal well 16/1-22 S in the western part of the field.

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