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high injection pressures, and the depleted fields casing is leaking
due to corrosion.

§5 MAIN HYDRODYNAMIC CALCULATIONS OF
DEVELOPMENT PARAMETERS WITH TAKING IN
ACCOUNT HETEROGENEITY OF PRODUCING LAYERS

Earlier during of all our calculations we have assumed
that reservoir is uniform formation with its permeability equal to
k mid. However, in practice all reservoirs are characterized by a
significant change of permeability along the horizontal and
through the thickness of the formation. In addition, reservoirs are
heterogeneous by its geological features and other properties,
which has been caused by sedimentation and further
metamorphoses of the rock.
The term "heterogeneity (non-uniformity)" refers to the
properties of the pore reservoir, caused by a change in its structural
and lithological characteristics. The distribution of any parameter
may be logical or random; therefore, such patterns and types of
formation heterogeneity distribution are defined:
-regular distribution of parameters in a nonhomogeneous
continuous formation;
-random probabilistic distribution of parameters in a non-
uniform continuous formation;
-zonal inhomogeneity, when within the reservoir there are
zones which differ significantly from other zones of the reservoir;
-layer heterogeneity, when in the section of the formation
singled out different stratums (separated from each other by
impermeable layers) with different values of permeability and
porosity.
Data about permeability, porosity, oil, gas, water
saturation, and carbonate content are obtained by analyzing core

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