Geology Reference
In-Depth Information
restriction of the migration processes as manifested by the development
in the Productive Sequence (Red-Bed Sequence) of extreme AHFP's and
nearly geostatic AHPP's (Kerimov and Rachinsky, 2010).
The combination of all stated circumstances does not bring home high
optimism regarding the potential of most local structures in the deep-
water area. At the same time, there occur gas-condensate fields associated
with structural traps strongly faulted and deformed by mud volcanism
and hydrodynamically associated with large regional faults. These faults
provide for the necessary extent of natural reservoir drainage, thus com-
pensating the negative effect of a great depth to the Productive Sequence
(Red-Bed Sequence) surface.
The preferable exploration targets of this kind are arranged in strips
structures gravitating toward the Shah-Azizbek, Central Caspian,
Sefidrud-Garabogaz and West Turkmenistan longitudinal (north-south),
the Sangachal-Ogurjin, Mil-Checkichler and Pre-Caucasus Minor latitudi-
nal (east-west) and diagonal Abikh Swell faults and especially toward their
intersections. Such structures include the following in the Abikh Swell
folding area, structures: Azizbejov (D-6), Shafag (D-8), Asiman (D-10),
J.Jabarly (D-17) and Mushwig (D-31). The Production sequence depth
there is 3,000-3,400 m. In the Sary-Checkichler zone, structures: West
Checkichler and possibly Khanlar, where the Productive Sequence depth
is 3,000-4,400 m.
Deserving most attention for the exploration of possible gas-oil occur-
rences at the current stage of knowledge are structures in the contract
blocks Alov (D-15) - Sharg (D-13) - Araz (D-19). They are associated
with the regional diagonal fault of the Abikh Swell; they are separated by
high-amplitude crosscutting faults and affected by intense mud volcanism.
The Productive Sequence top is recorded at minus 2,200-3,200 m and the
wetrr-depth is 450-700 m.
The contract block in the south of the Baku Archipelago, which includes
structures Savalan (D-23), Dalga (D-44), Lerik-Deniz (D-74) and Janub
(D-43), is not so promising due to drastic deterioration of the lithofacies
and reservoir parameters. The Productive Sequence top is recorded at
minus 1,600-2,800 m and the wetrr-depth is 250-400 m.
Naturally, these expectations do not assume structural “youth” of the
traps but do suggest the completion of their tectono-structural forma-
tion by the beginning of the major hydrocarbon invasion phase into the
Productive Sequence (Red-Bed Sequence) from the underlying section
(see later).
The aforementioned represents a skeptical view of high Productive
Sequence (Red-Bed Sequence) oil and gas potential in the deepest area
