No reservoir was encountered in the Heimdal formation. The 29-metre thick Zechstein group, which is composed of dolomites and limestone, is aquiferous and has relatively poor reservoir properties.
The objective of the 16/1-16 A appraisal well, which was drilled just south of 16/1-16, was to determine the oil/water contact. The well encountered a gross oil column of 30+ metres in the Hugin formation.
The Hugin formation is about twice as thick as in 16/1-16 and the reservoir quality was very good, as expected. The oil/water contact was encountered at 2440 metres below sea level. This is six metres deeper than the oil/water contact in the western part of the Ivar Aasen discovery.
Preliminary estimates of the resources proven with 16/1-16 and 16/1-16 A within production licence 457 are between 3 and 6 million standard cubic metres (Sm3) of recoverable oil.
The licensees in production licences 001 B, 028 B and 242 submitted a Plan for Development and Operation (PDO) for the Ivar Aasen discovery to the Ministry of Petroleum and Energy on 21 December 2012. The resources in production licence 457, which were proven with 16/1-16 and 16/1-16 A, are not included in the submitted PDO for Ivar Aasen.
Extensive data acquisition and sampling have been carried out. These are the first and second exploration wells in production licence 457. The licence was awarded in APA 2007. Wells 16/1-16 and 16/1-16 A were drilled to a vertical depth of 2722 and 2683 metres below sea level, respectively, and were terminated in the Rotliegende group in the Permian and the Skagerrak formation in the Triassic. The wells are permanently plugged and abandoned. Water depth is 113 metres.
The wells were drilled by the Bredford Dolphin drilling facility, which has proceeded to production licence 501 in the central part of the North Sea to drill appraisal well 16/3-5, where Lundin Norway AS is the operator.
Source: Norwegian Petroleum Directorate
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