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Figure 5.2 - Different types of permeability distribution
polygon

Detailed study of formation‟s non-uniformity results in
fact that there are several types of permeability distribution. The
most frequent are:
- bell-shaped(normal) distribution;
- gamma-distribution;
- log-normal distribution;
- balanced distribution;
- and others.
The main statistical characteristics of the studied
parameters are the following values:
- mathematical expectation or in other words expected value
(average weighted parameter):

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