It is well known, that injection water breakthrough by highly conductive channels leads to rapid watercut of producers. Herewith, the effectiveness of reserves recovery greatly decreases, even though the production from the initial recoverable reserves does not exceed 40-50%. This means that the most oil in place resides beyond the development zone. To correct the occurred situation and improve the efficiency of existing development system, the flow deviation technologies (FDT) are applied. Such technology allows limiting the injection water filtering through flooded pools and forward it to undeveloped oil saturated zones. The experience in applying FDT and watered formations selective shut-off is significant. However, the existing information on implementing the FDT in various geological conditions demonstrates the uncertainty in the technology efficiency. As some researchers mention, the technological effect from applying the flow deviation technology may be positive, negative and neutral. It is highlighted, that some target areas showed no response in producers after the technology implementation. Other areas showed steady decrease of watercut and increase in oil production. There are also reports indicating that FDT implementation resulted in a decrease of oil production and increase of watercut. The paper covers the peculiarities of applying the flow deviation technology (FDT) on modelled oil saturated reservoir and compares the effect of FDT with hydrodynamic effect (changing the injector operation mode). The main objective is to identify the conditions for effective implementation of the technologies.
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