Tectonic control on sedimentation, erosion and redeposition of Upper Jurassic sandstones, Central Graben, North Sea - From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin - page 493

NO-1/3-3
45 6

NO-2/1- 6
45 6

NO-2/1-4 NO-2/1-3

45 6

NO-2/1-8
45 6 12 3 1 23 1 23 45 6 1 23 1 23

BCU
J74 MFS

Tambar

200m

1/3-3

J71 TEMFS

2/1-6

Gyda

2/1-3

Erosion

2/1-4

J66 MFS

2/1-8

J64 MFS

J63 TEMFS

J62 MFS

Top Bryne Fm

1 : TVDSS. 2 : MD. 3 : 0 GR 150. 4 : 1.95 RHOB 2.95 and 0.45 NPHI 0.15. 5 : 0.2 Res 200. 6 : 140 DT 40.

N S

Lower shoreface sst
Offshore shale
Turbidite sandstone

Spiculitic shoreface sst (retrogradational)

Non-spiculitic shoreface sst (progradational)

Fig. 14. N-S aligned correlation panel from Tambar Field (left well) to Gyda Field (4 wells to right) showing truncation of
the Upper Jurassic sandstone in a crestal location (strong red line), removing spiculite sandstone (yellow with green spots)
and linked to downdip stratigraphic expansion dated to the J71 Fittoni TEMFS. Spiculite sandstone definition follows that
given by the study of Aase et al . (1996). TVDSS: True Vertical Depth Sub Sea (m); MD: Measured Depth (m); GR: Gamma
Ray log; DT: Delta Time (Sonic) log; RHOB: Bulk Density; NPHI: Neutron Porosity; Res: Resistivity.

SW NE 29/4d-4 22/30c-13

3000 3000

3500 3500

Glenelg Shearwater Field

West Franklin Elgin Field

4000 4000

4500

4500
metres

Salt

metres
5000

Triassic

5000

Salt

Salt

5500 5500

Rotliegendes

6000 6000

2000 m

6500 6500

Fig. 15. Geoseismic section showing the structural development of the West Franklin, Glenelg, Elgin and Shearwater fields.
A red unit towards the top of the Franklin Sandstone schematically indicates a thickening of the Top B Sands turbidite facies
interval towards Shearwater and Glenelg, away from the crest of Elgin Field which is supported on an underlying Rotliegend
fault block crest (figure adapted from Suiter et al ., 2005). The location of this section is indicated on Figs 1 and 8.