10.6084/m9.figshare.12221306.v1
J. WILSON
J.
WILSON
G. WALL
G.
WALL
H. J. KLOOSTERMAN
H. J.
KLOOSTERMAN
D. CONEY
D.
CONEY
G. CAYLEY
G.
CAYLEY
J. WALKER
J.
WALKER
C. LINSKAILL
C.
LINSKAILL
South Halibut Basin of the Moray Firth core displays
Geological Society of London
2020
argillaceous material
impedance contrast
Moray Firth core displays
fluid contacts
sandstone
Kopervik section
250 ft section
turbidity currents
heterolithic section
250 ft
12 ft section
South Halibut Basin
36 ft
deep-water gravity-driven sedimentation
debris flows
hydrocarbon indicator pre-drill
lower-density turbitity currents
Geology
2020-04-30 14:01:57
Journal contribution
https://geolsoc.figshare.com/articles/journal_contribution/South_Halibut_Basin_of_the_Moray_Firth_core_displays/12221306
Three continuous sections of core are displayed - all interpreted to be the result of
deep-water gravity-driven sedimentation (turbidity currents and debris flows). The upper
section (12 ft) occurs in the middle of a 250 ft section of massive,
relatively featureless sandstone interpreted to be dominated by high-density
turbidites. These occur at the top of the Kopervik section and form the bulk of
the gas/condensate-bearing reservoir.
The 12 ft section illustrates both massive sandstone (most representative of
the gross 250 ft upper section) and laminated sandstones, interpreted as the
tails of lower-density turbitity currents.
The lower continuous sections (24 ft and 36 ft respectively) contain more
chaotic argillaceous material and are interpreted as comprising more locally derived
debris-flows.
This overall heterolithic section is interpreted as being relatively flat-lying and
contains the fluid contacts in the core of the field. The impedance contrast near
the top of the unit is interpreted to have generated the 'flat-event' interpreted as
a direct hydrocarbon indicator pre-drill.