From Wikipedia, the free encyclopedia
Basement high and horst in the southwest of the Norwegian continental shelf
Map showing oil- and gasfields around Utsira High. To the west lies
Vikinggraben and east the
Norwegian trench .
Utsira High (
Norwegian : Utsirahøgda ) is a
basement high and
horst in the southwest of the
Norwegian continental shelf .
[1] It lies east of the
Viking Graben and west of the
Stord and
Egersund
basins 190 km west of
Stavanger .
[2]
[3] It was on the
Balder oil field at the flank of the Utsira High that oil was first discovered in Norway in 1967.
[3]
The
basement is of Utsira High is composed of
granite that formed in
Ordovician times.
[1] Parts of these granites contain
saprolite and
saprock that formed from
weathering above sea level during the
Early Mesozoic .
[2] before they became buried in
Late Jurassic and
Early Cretaceous -aged
sandstone .
[1] These weathered rocks may be
unconventional petroleum reservoirs .
[2]
The
strandflat at
Bømlo island is considered a
sedimentary rock -free equivalent to the Utsira High.
[1]
References
^
a
b
c
d Fredin, Ola; Viola, Giulio; Zwingmann, Horst; Sørlie, Ronald; Brönner, Marco; Lie, Jan-Erik; Margrethe Grandal, Else; Müller, Axel; Margeth, Annina; Vogt, Christoph; Knies, Jochen (2017).
"The inheritance of a Mesozoic landscape in western Scandinavia" . Nature . 8 : 14879.
doi :
10.1038/ncomms14879 .
PMC
5477494 .
PMID
28452366 .
^
a
b
c Riber, Lars; Dypvik, Henning; Sørlie, Ronald; Aal-E-Muhammad Naqvi, Syed Asmar; Stangvik, Kristian; Oberhardt, Nikolas; Schroeder, Paul A. (2017). "Comparison of deeply buried paleoregolith profiles, Norwegian North Sea, with outcrops from southern Sweden and Georgia, USA — Implications for petroleum exploration".
Palaeogeography, Palaeoclimatology, Palaeoecology . 471 : 82–95.
doi :
10.1016/j.palaeo.2017.01.043 .
^
a
b Riber, Lars; Dypvik, Henning; Sørlie, Ronald (2015).
"Altered basement rocks on the Utsira High and its surroundings, Norwegian North Sea" (PDF) .
Norwegian Journal of Geology . 95 (1): 57–89. Retrieved February 3, 2018 .