Geology Reference
In-Depth Information
reservoir of syngenetic ground water and the absence or sporadic appear-
ance of oil-gas-saturation in it.
The discovered interconnection between the nature and extent of hydro-
carbon saturation, tectonic conditions and thermobaric regime is not a
coincidence. It is legitimate and indicates the unique in all regions prime
cause of such correlation: vertical fluid migration through systems of faults
from zones of elevated formation temperature and abnormal pressure.
The following conclusions are based on the studies performed in this
Chapter:
1. In all areas clear quantitative correlations are established
between tectonic parameters of local structures and oil-gas-
saturation zones, the chemistry and the measure of water
medium vertical mobility, thermobaric parameters of the
structures and hydrocarbon reserves density.
2. Conceptually new opportunities are opening for drastic
improvement in the information value, efficiency and the
duration of the exploration/appraisal process. They may be
used for the solution at needed reliability level of a set of
forecasting tasks for the discovery and preliminary quanti-
tative estimation of oil and gas reserves on new additionally
identified structures based on detailed seismic and initial
rare exploratory and appraisal wells. These new opportu-
nities were derived from conceptual/imitation modeling of
local oil and gas-saturation within the areas of established
commercial oil and gas occurrences based on the cross-
flow/injection mechanism of formation of the accumula-
tions and fields. Modeling was implemented through pair
and multi-variant correlation between the hydrocarbon
reserves density of the known individual productive struc-
tures and their geotectonic, geo-hydrodynamical and geo-
thermobaric parameters.
