Geology Reference
In-Depth Information
portion of the South Caspian Basin appears to be premature. It would
require conducting numerous invasive studies. These studies should
include a total set of the regional satellite-based reconnaissance surveys;
full-featured marine gas- and geochemical survey imaging local anomalies
in the regional background; a reliable identification and mapping of the
geologic medium and depth heat-mass transfer instability areas; integrated
studies of the submarine mud volcanism; stratigraphic wells and high-res-
olution regional geophysical surveys. These would allow for the integra-
tion of the paleotectonic, paleo-structural and palinspastic reconstructions
into a digital petroleum geology model of the basin. This model should be
amended and formalized (using programming techniques) based on the
aforementioned fluid-dynamics concepts. In the case of a positive result,
the South Caspian Basin in-place hydrocarbon potential could be substan-
tially upgraded.
Based on all the aforementioned, it is logical to assume that the
Productive Sequence (Red-Bed Sequence) in the South Caspian Basin
was saturated by hydrocarbons under a two-stage step process. he
dominant form of the hydrocarbon saturation in the inversion uplifted
Basin's flank framework is the
present-day
ongoing fluid migration.
In the immersed deep-water portion of the Basin, where Productive
Sequence (Red-Bed Sequence) reservoirs are positioned at a depth of 7
to 9 km, their major oil and gas-saturation was likely completed by the
time of the avalanche deposition of the Post-Pliocene series, i.e. during
Akchagylian-Early Apsheronian time.
Therefore, the first priority tasks
at the stage of a preliminary (estimative) reconnaissance in the region
must be the identification in the current structure plan of the central
Basin and mapping of individual anticlinal belts, zones, blocks and
areas whose local structures have been structurally completed prior to
the stage of the most intense Post-Early-Apsheronian sedimentogenesis.
