Sandflyndre Member [new]
Shetland Group,
Blålange Formation
Name
Derivatio nominis: Norwegian for the Common Dab Limanda limanda. This fish
is appropriately found on sandy substrates down to about 100m water depths along the whole
of the Norwegian coast.
Informal name: None.
Lithology
The member consists of interbedded sandstones, conglomerates and mudstones. In the type
well 6610/3-1R, 9m of core (core#2) was taken in the middle part of the member and
shows both uniform, structureless, fine to medium grained grey sandstones and
conglomerates with large (up to dm scale) rounded to sub-rounded clasts that are both
grain supported and within a fine-medium sandstone matrix.
Upper and lower boundaries
Lower boundary
The lower boundary of the Sandflyndre Member is well defined on wireline logs by an
abrupt decrease in GR values, increase in sonic log values and negative separation
between neutron and density logs.
Upper boundary
The upper boundary is relatively sharp and well defined on GR logs representing the
development of mudstones.
Thickness
The gross thickness of the member is 211 m in the type well.
Interactive Norlex isochore map for the Sandflyndre Member (type well only).
Geographical distribution
This member is the lowermost sandstone member of the
Blålange Formation (Shetland Group)
developed in the Vestfjorden Basin SW of the Røst Island, Lofoten Islands. It is also
approximately time equivalent i.e. Cenomanian age to the geographically distinct
Gapeflyndre Member (eastern Møre margin) and
Smørflyndre Member (Dønna Terrace)
suggesting a regional input of coarse clastic sediments into basinal/terrace areas at
this time.
Occurrences of member tops in
wells
Type well
Well name: 6610/3-1 R
WGS84 coordinates: N 66°55'29.70", E 10°54'06.28"
UTM coordinates: 7424470.29 N 583170.04 E
UTM zone: 32
Drilling operator name: Den norske stats oljeselskap a.s
Completion date: 11.12.1993
Status: Susp. reentered later
Interval of type section (m) & thickness in type well:
3412 m - 3201 mMD, 211 m thickness.
Reference wells
None designated.
Well log characteristics
The member shows a blocky to serrate GR log profile with thicker, more massive beds being
developed towards the base.
Age
Late Cretaceous, Cenomanian.
Depositional environment
Deep marine.
Core was taken over a small percentage (4%) of the member in the type well 6610/3-1R and
this may or may not be representative of the member as a whole. The member is interpreted
as being deposited as basin floor/slope turbidites and mass gravity flows and amalgamated
channel and lobe (BT2 facies), interlobe and lobe fringe (BT2) and basin mudstones (BM1).
References
No previous published sources. Data from the Operator final well report and the NPD fact
pages.
