6406/3-10

General

Well 6406/3-10 was drilled to test the Bergknapp prospect on the Halten Terrace in the Norwegian Sea. The primary objective was to prove oil in the Middle to Early Jurassic Fangst and B t groups. In case of a discovery the well would be tested and cored.

Operations and results

Wildcat well 6406/3-10 was spudded with the semi-submersible installation West Mira on 8 November 2019. West Mira completed drilling the top hole to TD in the 16" section at 2287 m and installed the 13 3/8" intermediate casing. However, problems caused by the very rough winter season and inability to essential crew change during the Covid 19 pandemic it was decided to suspend the well on 29 January 2020 and complete the remaining well scope with a different drilling unit. Two months later, the Scarabeo 8 went on contract on 3 March 2020 and drilled the remaining part of the well to TD at 4600 m in the Early Jurassic re Formation. The well was drilled with seawater and hi-vis pills down to 418 m, with KCl/polymer/GEM mud from 418 m to 1197 m and with Innovert NS oil-based mud from 1197 m to final TD. Scarabeo 8 went off contract on 5 April 2020 and the wellbore 6406/3-10 was again suspended for a year until it was re-entered with DeepSea Aberdeen for drill stem testing.

The well proved hydrocarbons in the Garn, Ile, Tilje and re formations. The Garn Formation had an oil column of at least 60 meters, with the oil-water contact estimated at 4128.7 m based on the log response and the oil and water samples taken in the reservoir. The Ile Formation was penetrated with a 65-meter oil column. The reservoir has a high hydrocarbon saturation at the top of the interval, while the rest of the reservoir is likely in a transition zone. The reservoir was clas