posted on 2020-04-30, 14:18authored byM. HEMPTON, J. MARSHALL, S. SADLER, N. HOGG, R. CHARLES, C. HARVEY
These cored sections have been chosen to illustrate variation in the Forties
reservoir from relatively proximal in the main Forties fan (Nelson) to more distal
(Pierce) and distal with significant deformation in a lateral fan (Merganser).
The two Nelson cores show the contrast between what have been defined as
channel and interchannel areas, with channel areas carrying permeabilities of
the order of 300 mD. Three sections from the Pierce well 23/22a-3 have been selected to show the
persistence of channelised sands into distal areas of the fan, along with finer
grained intervals. The two Merganser sections show relatively undeformed Forties sandstones
with a basal faulted contact, overlying Lista heterolithics with the pervasive
deformation that often occurs where fields are affected by salt growth during
and shortly after deposition.