Centrica Resources Norge’s wildcat well 6707/10-3S is being permanently plugged and abandoned after making a minor gas discovery in the Norwegian Sea, according to the Norwegian Petroleum Dictorate (NPD).
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Map of PL 528 B. From NPD. |
Wildcat well 6707/10-3 S in production license 528 B (PL 528 B) was drilled about 20km northeast of Statoil’s giant Aasta Hansteen field.
The well was drilled to a vertical depth of 4264m below the sea surface in 1421m water depth, using the West Navigator drillship. Drilling was terminated in the Lange formation in the Lower Cretaceous after Centrica encountered a total gas column of about 12m in the Kvitnos formation with good reservoir properties. The entire reservoir zone, including the water zone, has a gross thickness of about 200m.
The primary and secondary exploration targets for the well were proving petroleum in Upper Cretaceous reservoir rocks, the Kvitnos and Lysing formations, respectively.
Reservoir rocks were encountered in the secondary exploration target with a total of 25m thickness in the Lysing formation, which was tight and aquiferous.
Preliminary calculations of the size of the discovery are between 2Bcm and 8Bcm of recoverable gas. The NPD says Centrica will assess well results with regard to profitability. The well was not formation tested, but extensive data acquisition and sampling were carried out.
This marks the first exploration well in PL 528 B. The license was awarded in the 21st licensing round, as an addition to production license 528.
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