7221/4-1

General

Well 7221/4-1 was drilled to test the Polmak prospect on the Loppa High in the Barents Sea. The primary objective was to test the reservoir properties and hydrocarbon potential of sandstone in the Early Triassic Kobbe Formation, Polmak prospect. The hydrocarbon potential in the Anarjok prospect in the lower Havert Formation, and the reservoir properties in the Permian Røye Formation were secondary objectives.

Operations and results

Wildcat well 7221/4-1 was spudded with the semi-submersible installation West Bollsta on 10 October 2020 and drilled to TD at 1570 m in the Late Permian Røye Formation. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 470 m and with Hydraglide water-based mud from 470 m to TD.

The target Polmak sandstone was penetrated from 1355.7 to 1364 m and had indications of hydrocarbons as described below. No reservoir rocks were encountered in the secondary targets.

Weak shows, very slow streaming blue, fluorescent cut, were recorded at 910 and 970 m. At 110 m weak yellowish green crush cut fluorescence and weak residual ring was observed. The cored sandstone in the main target had shows in the form of faint hydrocarbon odour, patchy dull yellow direct fluorescence, fast cloudy bright yellow to blue cut fluorescence, bright white cut fluorescence residue, no visible cut. At 1407 and 1434 m very slow cloudy weak yellowish

to green cut fluorescence with dull blue to white residue ring was recorded.

Twenty-two meters of core was cut in