Central Graben

PGS has merged ~18 000 sq. km of high-quality GeoStreamer 3D data into a single volume that reveals new plays. Imaging is significantly improved, including Middle to Late Jurassic source rocks, individual Jurassic fluvial-deltaic to shallow marine sandstones, Late Cretaceous to Paleocene chalk and sandstones, and intra-Jurassic to Paleocene claystones. 

There is still plenty of potential waiting to be explored in this area. Key fields in the area are Ula, Gyda, Ekofisk, Eldfisk, and Valhall, with discoveries: King Lear, and Mjølner.

Key Benefits

  • Explore the regional structure, identify leads and develop prospects
  • Excellent depth data with outstanding resolution of shallows
  • A new play permo-carboniferous is revealed
  • ~18 000 sq. km of GeoStreamer data

Geology

From north to south our Central Graben dataset covers Gert Ridge over the Gertrud Graben, Piggvar Terrace and Mandal High, Søgne Basin, the Coffee Soil Fault complex, Heno Plateau, the Tail End Graben and Ringkøbing Fyn High. Nine fields and discoveries in Late Jurassic sandstones and Cretaceous chalk and limestones are tied to this dataset: parts of Elgin-Franklin, Puffin, Gyda, King Lear, Flyndre, Ekofisk,Valhall, Bertel and parts of Valdemar. A new permo-carboniferous play is revealed.

There are many geological targets in the area. The main petroleum system is characterized by Middle to Late Jurassic source rock and individual Jurassic fluvial-deltaic to shallow marine sandstones, plus Late Cretaceous to Paleocene chalk and sandstones, sealed by intra-Jurassic to Paleocene claystones.

Imaging

Imaging routines have been applied to target the Paleocene and Cretaceous chalk, middle to late Jurassic, as well as the Permian and Triassic. Permian eolian sands are particularly well imaged by a workflow that has included.

• 3D surface related multiple elimination
• High-resolution radon demultipler
• 3D TTI anisotropic Kirchhoff depth migration

 

Location map GeoStreamer PURE Central GrabenGeoStreamer PURE Central Graben