7219/9-3

General

Well 7219/9-3 was drilled to test the Mist prospect on the border between the Bjørnøyrenna Fault Complex and the Polhem Sub-platform in the Barents Sea. The primary objective was to prove hydrocarbon contacts and commercial oil volumes in the Early Jurassic Tubåen Formation. Secondary objective was to collect data to improve understanding of potential reservoir rocks in the Late Triassic Fruholmen Formation.

Operations and results

A 9 7/8" pilot hole (7219/9-U-1) was spudded 20-25 m away from the main bore location on the 9 July 2020 and drilled down to the planned TD of the 17 ½’’ section at 757 m to check for shallow gas and reduce the depth uncertainty towards a seismic anomaly. No shallow gas was observed during drilling and the geological uncertainty was reduced by using seismic while drilling.

Wildcat well 7219/9-3 was spudded with the semi-submersible installation Transocean Enabler on 12 July 2020 and drilled to TD at 1338 m in the Late Triassic Fruholmen Formation. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 757 m and with BaraHIB water-based mud from 757 m to TD.

In the primary exploration target, the well encountered the Tubåen Formation with a thickness of 131 metres, of which 50 metres was sandstone layers with very good reservoir properties. Two hundred and sixty-nine metres of the Fruholmen Formation were drilled in the secondary exploration target, whereof several sandstone layers totalling 75 metres with reservoir properties varying from good to very good. The Tubåen and Fruholmen formations were water bearing with low gas readings and no hydrocarbon indications. The only hydrocarbon indic