Lundin Norway has completed the drilling of appraisal wells 7220/11-4 and 7220/11-4 A in the 7220/11-1 (Alta) oil and gas discovery within production licence 609 in the Barents Sea.
The aim of the drilling operations was to delineate discoveries earlier estimated to contain between 20 million and 64 million cubic metres of recoverable oil equivalents.
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Situated 2km from 7220/11-1 discovery well and nearly 3km from the 7220/11-3 and 7220/11-3 A appraisal types, the wells were proven in October 2014.
Under the campaign, well 7220/11-4 delineated the eastern flank of the discovery and identified the reservoir extent of conglomerates of late-Permian to early Triassic Age, late-Carboniferous to early Permian carbonate rocks (Ørn formation), hydrocarbon columns and the quality of Carboniferous reservoir rocks.
The discovery at 7220/11-4 A was found 1km north of 7220/11-4, and identified the extent of late-Permian to early Triassic conglomerates, as well as the quality of late-Carboniferous to early Permian carbonate rocks (Ørn formation).
Well 7220/11-4 and well 7220/11-4 A encountered 48m and 54m hydrocarbon columns respectively, with combined 44m of oil columns.
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By GlobalDataMultiple zones exhibited decent permeability, although the reservoir quality through the oil column differed in the two wells.
Extensive data and samples gathered by the company highlighted good communication within the Alta structure.
These results will help the company map the eastern flank of the discovery and re-evaluate the resource estimate.
Appraisal wells 7220/11-4 and 7220/11-4 A represent the tenth and 11th exploration wells in production licence 609 drilled using the Leiv Eiriksson drilling facility.
The facility will now drill the wildcat well 7220/6-3 in the northern part of production licence 609.
