Shell Completes Onyx Sorvest Appraisal Well
Norske Shell, operator of production license 255, has concluded drilling of appraisal well 6406/9-2 on the 6406/9-1 discovery, Onyx Sorvest.
The 6406/9-1 discovery was proven in 2005 and is located approximately 40 km northwest of the Draugen field in the Norwegian Sea. The discovery contains gas in Middle to Lower Jurassic rocks. In a press release issued in January 2006, the NPD indicated a range of uncertainty of 10-50 billion Sm3 recoverable gas for the discovery.
The objective of appraisal well 6406/9-2 was to delimit the discovery. The well encountered gas/water contacts in Middle to Lower Jurassic rocks, thus confirming the northerly extent of the discovery. The NPD's preliminary assessment is that the size of the discovery is probably in the upper half of the uncertainty range. The well was not formation tested, but extensive data collection and sampling were carried out. The collected data will be analyzed to enhance the estimated size and production characteristics of the discovery.
The appraisal well was drilled to a total depth of 5330 meters below sea level, and was concluded in the Are formation of the Lower Jurassic Age. The water depth was 299 meters. The well has now been permanently plugged and abandoned. The well was the fourth exploration well in production license 255, which was awarded in the 16th licensing round in 2000.
The well was drilled by the West Alpha semisub, which will now proceed to the Kristin field in the Norwegian Sea to drill production well 6506/11-N-2 H.
The licensees in production license 255 are Norsk Shell as operator with 30%; Petoro with 305; Statoil with 20% and Total with the remaining 20%.
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Company: Norwegian Petroleum Directorate more info
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