Dry wells for BG near Knarr

BG Group has completed drilling two wells in the Norwegian sector of the North Sea classified as dry by the Norwegian Petroleum Directorate (NPD).

The 34/3-4 S and 34/3-4 A wells were drilled on production license 373 S, about 5km east of the Knarr field in the northern part of the North Sea, where BG Group operates the Knarr FPSO.

Wildcat well 34/3-4 S, on the Jordbær Sørøst prospect, was investigating a large channel system in reservoir rocks in the Pleistocene.

The well encountered a 250m thick channel system, about 50m of which was of very good reservoir quality. Traces of gas were encountered in two thin sandstone layers, the NPD says.

Well 34/3-4 A was targeting petroleum in lower Jurassic reservoir rocks (the Cook formation). Well 34/3-4 A encountered about 110m of the Cook formation, 53m of which was sandstone with good reservoir quality and traces of gas, the NPD says.

The wells were the fifth and sixth exploration wells in production license 373 S. Wells 34/3-4 S and 34/3-4 A were drilled to 1607m and 4535m measured depth, and 1584m and 4321m vertical depth below the sea surface, and were terminated in the Hordaland group in the Miocene and the Amundsen formation in the Lower Jurassic. Water depth was 406m. The wells, drilled using the semisubmersible drilling rig Transocean Searcher, will now be permanently plugged and abandoned.

The Transocean Searcher will now move on to drill wildcat well 34/3-5 S in the same production license.