Geoscience Reference
In-Depth Information
Fig. 3.40
Example model of heterolithic flaser bedding
(
left
) with corresponding permeability model (
right
).
Note the bi-directional sand lamina sets (
green
and
yellow
laminae) and the partially preserved mud drapes
(
dark tones
). Higher permeabilities indicated by
hot
colours
(Modified from Ringrose et al.
2005
Petrol
Geoscience, Volume 11,
Geological Society of
#
London [2005])
Fig. 3.41
Results of sub-
metre-scale simulation of
heterolithic bedding in tidal
deltaic reservoirs. Effective
permeability simulation
results are for the constant
petrophysical properties
case (i.e. sandstone and
mudstone have constant
permeability). Observed
effective permeability is
compared to bedding styles
and the critical points
A
,
B
and
C. A
is the percolation
threshold for k
x
, and
C
is
the percolation threshold
for k
z
, while
B
is the
theoretical percolation
threshold for a simple 3D
system. Thin lines are the
arithmetic and harmonic
averages
Lenticular
\
Wavy
\
Flaser
x
z
100
Kx
Kz
Ky
80
A
B
C
60
40
20
0
100
Kx
Kz
Ky
10
1
0.1
0.01
0
0.2
0.4
0.6
0.8
1
V
sand
