Jurassic sandstone plays in the Danish central Graben, North Sea - New Results

P.N. Johannessen, C. Andersen, K. Dybkjær, F. Jakobsen, L. Kristensen, R. Weibel, H.I. Petersen, E. Thomsen, E.B. Nielsen

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

Abstrakt

Recent exploration activities have led to encouraging results in Jurassic - Lower Cretaceous sandstones in the Danish Central Graben. Two Upper Kimmeridgian High-Temperature High-Pressure (HTHP) environment sandstone plays have been investigated. 1) The Hejre wells located in the Gertrud Graben found oil in the Upper Jurassic shallow marine shoreface sandstones at a depth below 5000 m. 2) The Svane-1 well located in the northern part of the Tail End Graben found gas-bearing sandstone successions of deep marine gravity-flow origin below 5300 m. Further, a number of wells drilled within the most recent years adjacent to existing Jurassic discoveries all encounter hydrocarbons in Middle or Upper Jurassic sandstones. The good porosity on the HTHP sandstone plays is linked to dissolution of feldspar grains and to thick pore-lining illite coatings which inhibit quartz precipitation. Upper Jurassic shallow and deep marine sandstones are sourced from the prolific claystones of the Farsund Formation; Middle Jurassic fluvial-deltaic sandstones are sourced from interbedded coals and coaly claystones. The future challenge is to predict the distribution of sandstones that have undergone a favourable diagenetic development. The focus in this review will be on distribution and quality of sandstone reservoirs.

OriginalsprogEngelsk
Titel74th European Association of Geoscientists and Engineers Conference and Exhibition 2012 Incorporating SPE EUROPEC 2012
UndertitelResponsibly Securing Natural Resources
ForlagEuropean Association of Geoscientists and Engineers, EAGE
Sider1814-1818
Antal sider5
ISBN (Elektronisk)978-90-73834-27-9
DOI
StatusUdgivet - 2012
Begivenhed74th European Association of Geoscientists and Engineers Conference and Exhibition 2012 Incorporating SPE EUROPEC 2012: Responsibly Securing Natural Resources - Copenhagen, Danmark
Varighed: 4 jun. 20127 jun. 2012

Konference

Konference74th European Association of Geoscientists and Engineers Conference and Exhibition 2012 Incorporating SPE EUROPEC 2012: Responsibly Securing Natural Resources
Land/OmrådeDanmark
ByCopenhagen
Periode4/06/127/06/12

Emneord

  • Sandstone deposition
  • Danish Central Graben

Programområde

  • Programområde 3: Energiressourcer

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