Successful appraisal well and extended production test on the Alta discovery

26. september 2018


Idemitsu Petroleum Norge is pleased to announce that drilling and extended production testing (EWT) of the Alta appraisal well 7220/11-5, operated by Lundin Norway AS, has been successfully concluded. 

The appraisal well is located approximately 4 km south of the original Alta discovery well and is the fifth well drilled on the Alta discovery. The main objectives of the appraisal well and two-month extended production test were to prove sustainable production rates and reduce uncertainty associated with resource recovery from Permo-Triassic karstified and fractured carbonate reservoirs, to provide the basis to progress development studies.

The wellbore, which included a 720 m long horizontal section, was successfully drilled and encountered all targeted reservoir intervals which consist of a mix of siliciclastic and carbonate rocks in the Falk Formation, and carbonate rocks in the Ørn Formation from the Late Carboniferous to Early Permian period. The reservoir quality is considered to be good to very good.

The well was tested through the rig “Leiv Eiriksson” and the produced volumes were flowed via a flexible flowline to the Teekay “Scott Spirit” tanker. The extended production test lasted for about two months. Extensive data acquisition and sampling has been carried out during the test, including production logging. The results demonstrated excellent reservoir productivity with contribution from all reservoir intervals.

The oil produced to the tanker will be delivered to the Mongstad oil terminal on the west coast of Norway and will subsequently be sold.

Once all new data gathered from the well, combined with the recently available latest-generation 3D seismic survey (“Topseis”) that covers the entire Alta, has been processed, the resource range for the Alta will be updated in due course.

Hiroshi Arikawa, Managing Director of Idemitsu Petroleum Norge, comments: 
“I am most pleased with the results from the Alta appraisal well and the extended production test. New and encouraging information regarding horizontal well feasibility, reservoir connectivity, quality and productivity adds to our hope for a commercial development of our Alta discovery.”

Idemitsu Petroleum Norge holds a 30 % working interest in PL 609, which was awarded in the 21st licensing round in 2011. The license is operated by Lundin Norway with a 40 % working interest. The remaining 30 % interest is held by DEA Norge.

The NPD press release may be found here:

Idemitsu Petroleum Norge has a license portfolio focusing on the Barents Sea and Northern North Sea with ten producing assets in the Snorre and Fram field areas, in addition to being the second largest owner in the Knarr field Idemitsu Petroleum Norge has held material shares in promising discoveries such as Alta, Wisting/Hanssen, Cara and Peon since the licenses were awarded. Being present on the Norwegian Continental Shelf for nearly three decades, Idemitsu also participates in petroleum activities offshore Vietnam as operator.