Geology Reference
In-Depth Information
Table 5.3
(Cont.)
Clay
sequence
burial depth
range, km
Clay
sequence
development
area, km
2
Clay
sequence
thickness,
km
Clay
sequence
volume,
km
3
Clay total porosity
range in the burial
in
terval, %
Duration of
deposition
in burial
interval, MY
Clay compaction
rate, 10
-6
%/year
max
min
ΔØ
Clays in alternating clay/sand sequences of basin's lanks
0.02-0.25
90.00
1.50
135.00
41.0
35.0
6.0
0.54
11.1
0.25-1.50
90.00
1.50
135.00
35.0
18.9
16.1
2.71
5.9
1.50-3.00
90.00
1.50
135.00
18.9
7.2
11.7
3.25
3.6
3.00-4.00
90.00
1.50
135.00
7.2
3.8
3.4
2.17
1.6
4.00-6.00
90.00
1.50
135.00
3.8
1.0
2.8
4.33
0.6
* For Darcy's equation calculations, it was assumed in the irst two cases that the “neutral” surface (boundary between water squeeze-up
and down) is positioned in the middle of the clay sequence. Pressure gradient over a distance of 1,000 m was assumed to be 10 MPa
