7121/1-2 S

General

Well 7121/1-2 S was drilled to test the Setter and Pointer prospects in the Hammerfest Basin of the Barents Sea. The primary objective was to test the reservoir properties and hydrocarbon potential of the Early Cretaceous Kolmule (Setter prospect) and Knurr (Pointer prospect) formations. The secondary objective was to test the presence and reservoir properties of the Middle Jurassic Stø Formation.

Operations and results

Wildcat well 7121/1-2 S was spudded with the semi-submersible installation Leiv Eiriksson on 6 January 2019 and drilled to TD at 3375 m (3360 m TVD) m in the Middle Jurassic Stø Formation. A 9 7/8” pilot hole was drilled from 410 to 806 m. No shallow gas was observed. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 808 m and with High Performance water-based mud with 3.5 – 5% glycol from 808 m to TD.

The well proved reservoir from 2109 m 2149 m (2093.8 to 2133.8 m TVD) at base Kolmule Formation, but the sandstones were water wet with only weak shows (weak cut and residue fluorescence). Reservoir was also proved in the Knurr Formation with main sands in the interval ca 2794 to 2890 m (2779 to 2875 m TVD). The Knurr Formation sandstones had fair to good oil shows with weak odour, direct fluorescence and cut and residue fluorescence, and oil was sampled in the upper part of the sandiest interval. The Knurr sands were however generally tight due to extensive cementation. Sandstone stringers/sandstones without hydrocarbon shows were encountered in the Hekkingen Formation and in the Stø Formation.

Two cores were cut. Core 1 was cut from 2795 to 2819.1 m with 99% recovery. The core-log depth shift for this