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n   2 t 2 .
 2
Due to the fact that reservoir is characterized as highly
non-uniform there are several methodologies that gives us ability
to determine the change of permeability horizontally and though
the depth. The most common used are VNII-1, VNII-2 and
manyothers.

5.1 VNII-1 methodology

Created by professor Borisov, this methodology is one of
the first of it‟s kind and the most used. It is based on permeability
distribution polygon, relying on which Borisov created reservoir
model that consists of equal cross sections and stacked
streamlines.
Reservoir model - it is range of layers of streamlines,
which stretch from one corner to another through the whole
reservoir. By creating the general concept about reservoir
consisting of streamlines, we take that at every moment of time,
the velocity of filtration flow is proportional to the permeability.
By solving the case for one streamline, and then summarize the
flow rate of all streamlines, it is possible to obtain a solution for
the whole reservoir, with the separation of a liquid that has passed
through the reservoir with separating on oil and water.
After developing general understanding about reservoir
running calculations are carried out in such order.
The permeability distribution polygon should be rebuilt
from the coordinate system “k-n” to “æ-n(æ)”.
k n
  i ; n( )  i ,
k mоо  n i
where (k i, n i, k mod are taken from permeability distribution
polygon). Further transformation of permeability distribution

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