7221/12-1

General

Well 7221/12-1 was drilled to test the Svanefjell prospect on the south-eastern part of the Loppa High in the Barents Sea. The primary objective was to prove presence of moveable hydrocarbons in the Late Triassic Snadd Formation.

Operations and results

Wildcat well 7221/12-1 was spudded with the semi-submersible installation Deepsea Stavanger on 4 May 2018 and drilled to TD at 724 m in the Late Triassic Snadd Formation. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 560 m and with 1.12 sg water-based mud from 560 m to TD.

The Snadd Formation was encountered at 570 m and extended to well TD. There was a total gas column of 15 m in the uppermost part of the Snadd Formation of which about 9 m was in sandstones with moderately to good reservoir quality. The gas-water contact is placed at ca 585 m. Generally uniform shows were described on cuttings and cores from 574 m to about 600 m: no odour, no stain, excellent dull to bright yellow direct fluorescence, fast to moderate blooming-streaming cut fluorescence, bluish white even fluorescence residue. From 602 m down to 618 m the shows become more heterogenous, but often with odour and stain. Weaker shows were recorded down to 665 m, and no shows from there to TD.

Two cores were cut in succession from 574 to 626.47 m with 100% total recovery. MDT gas samples were obtained from depths 564.5 m, 571.1 m, and 582.5 m. All samples contained dry gas with more than 96% Methane, less than 0.8% N2, less than 0.03% CO2 and the rest C2+ hydrocarbon gases. Water samples were collected from depths 589.3 m and 604.5 m

The well was perma