6507/3-14

General

Well 6507/3-14 was drilled to test the Black Vulture on the Halten Terrace in the Norwegian Sea. The objective was to test turbiditic sandstones within the Lange Formation.

Operations and results

Wildcat well 6507/3-14 was spudded with the semi-submersible installation West Hercules on 28 July 2021. No shallow gas was expected, but minor gas bubbles was observed streaming from conductor cement ports by ROV when running BOP. Streaming gas bubbles from the conductor port and four seabed locations outside conductor continued throughout well operations with a decreasing trend. A well control incident occurred at 1922 m with 3.9 m3 influx comprising water and some gas. The influx zone was sealed off with a 90 m cement plug and 9 5/8" liner run to 1836 m. Drilling commenced to core point at 3266.7 m, and when pulling out the drill pipe got stuck in Lysing Formation sand. After working to free the pipe a long time without success the section was P&A and a sidetrack 6507/3-14 T2 was kicked off from 1774 m. The sidetrack was drilled to final TD at 3418 m in the Early Cretaceous Lyr Formation. The well was drilled with seawater and hi-vis pills down to 1350 m and with Versatec oil-based mud from 1350 m to the sidetrack kick-off at 1774 m. The sidetrack was drilled with Versatec oil-based mud down to 2898 m and with ExploraDrill oil-based MUD from 2898 m to final TD.

The intra Lange Formation target sands were encountered at 3266 m. Approximately 24 m of sandstone with moderate reservoir properties was found. The pressure in the Lange sandstones was measured with WFT and were in a similar pressure regime as measured in the 6507/3-13 well, but the targets were penetrated below the OWC. The only hydrocarbon indication in the well