6407/3-2 S

General

Well 6407/3-2 S was drilled to test the Lanterna prospect, located on the Trøndelag Platform, west of the Mikkel Discovery in the Norwegian Sea. The primary objective was to test migration of hydrocarbons into the prospect, and to prove hydrocarbons in the Garn, Tilje and upper Åre formations. Secondary objective was to test the hydrocarbon potential in the Lower Åre Formation and the Triassic Grey Beds.

Operations and results

Wildcat well 6407/3-2 S was spudded with the semi-submersible installation West Hercules on 6 August 2019 and drilled to TD at 2628 m (2589.4 m TVD) m in the Early Jurassic Åre Formation. An 8 ½” pilot well was drilled after the 42” from 320 to 477 m. The pilot hole observed gas bubbles at approximately 477 m. The flow was stopped with 1.60 sg kill-mud. After evaluating the situation and performing required measures to handle the situation, drilling continued as planned. Otherwise operations proceeded without significant problems. The well was drilled with seawater down to 435 m and with Glydril mud from 435 m to TD.

A 41 m TVD thick Spekk Formation was penetrated above top Garn Formation, which was encountered at 2000 m (1983 m TVD). The Garn Formation contains a thick reservoir sandstone interval with an interbedded siltstone body and limestone stringers. The underlying Not Formation is predominantly clay and siltstone, while the Ile Formation consists of alternating sand and siltstone with traces of claystone and limestone. The Tilje Formation was encountered at 2314 m (2286 m TVD) and consisted of interbedded bodies of sandstone, siltstone, and claystone. The Åre Formation was encountered at 2430 m (2398 m TVD) and consists of interbedded bodies of sandstone, siltstone, and claystone with coals in th