Geology Reference
In-Depth Information
As Figure 6.10 shows, in all oil and gas areas of the region on the struc-
tures with maximum per-unit faulting, intensity and invasion extent of the
section by the lower waters the abnormality factors are at the minimum.
It means that on a significantly faulted structure the discharge of the geo-
fluid-dynamic system occurs relatively unobstructed and decreases parallel
to the faulting decline. Apparently, the former case relates to hydraulically
open traps and the latter to closed traps.
These correlations show low К abn values in the Apsheron Peninsula fields
of just 1.00-1.10. This area is a major hydrocarbon reserves concentration
node in the region and a powerful regional ground water discharge zone.
This is supported by:
t Broad development there of depth-fed salt lakes, ascending
sources, sinters of hydrothermal mineral formations, mud
volcanoes.
Permeability k 10 , m/year
0
0.2
0.4
0.6
0.8
1.0
0.01
0.05
0.1
0.5
1
5
10
50
100
200
Figure 5.8 Clay rock permeability vs. depth (after Mukhin).
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