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There are four periods of the oil field, called stages (Fig.
2.1).

Figure 2.1 – The periods of the oil field

The first stage (stage input field operation) when taking
place intensive drilling of the main amount of wells, the rate of
development continuously increases. During this phase mined
usually oil without water. The duration of the stage depends on the
size of the deposit and the rate of drilling. Duration of the stage is
4-5 years, depending on the rate of drilling deposit.
The second stage (the stage reached by maintaining the
maximum level of oil production) is characterized by more or less
stable annual oil extractions. The main objective of this phase is
done by drilling reserve fund regulation modes of development
wells and the full system flooding or other method action on the
layer. Some wells by the end of the stage stop and gush their way
transferred to mechanized operation. The main task - to support

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