Hugin Formation (new)
(From NPD Bulletin no. 3)
Recommended as Member in Norlex
Vestland Group
Name
One of Odin's two ravens in Norse mythology.
Well type section
Norwegian well 15/9-2
(Statoil) from 3483 m to 3657 m, coord N58°25' 34.06", E01°42'28.2" (Fig. 26).
Well reference section
Norwegian well 15/6-5
(Esso) from 3627 m to 3679 m, coord N58°30'29.67", E01°45'50.4" (Fig. 28).
Thickness
The formation is 174 m thick in the type well and 52 m thick in the reference well.
Lithology
The formation consists of light brown to yellow, very fine to medium grained sandstones. Occasional coarse grained layers are found. The sandstones have fair sorting, and the grains are subangular to subrounded. Shale and siltstone partings are common. Carbonaceous material and coal fragments are abundant. Occasional thin coal beds can be observed. The sandstones are often bioturbated, but cross bedding can sometimes be observed. The sandstones are often calcareous and glauconitic.
Boundaries
The lower boundary represents the transition from the coaly
Sleipner Formation. The upper boundary represents
the transition into the shales of the Viking
Group, giving clear breaks both on sonic and gamma ray logs.
Distribution
The formation is found in the southern Viking Graben, north of the Jaeren High.
Age
Early Bathonian to Early Oxfordian.
Depositional environment
The formation represents near shore, shallow marine sandstones with the occasional influence of continental fluviodeltaic conditions.
