The article considers the introduction into development and analysis of the effectiveness of the existing development system for fields with a complex structure and heterogeneous filtration and reservoir characteristics limits the possibility of using classical methods, developed mainly in the middle of the last century. Such methods also include methods for substantiating the oil recovery factor. One of the most common methods is the extrapolation method of displacement characteristics. While paying great attention to the selection of the displacement characteristics based on the accuracy of the description of the actual data of the accumulated technological indicators of development, fundamentally important conditions for the application of these characteristics are often omitted from consideration. In fact the possibility of using the displacement characteristics method is influenced not only by the geological features of new fields, but also by fundamentally different decisions which are taken to form the development system. In particular, this includes the allocation of hydrodynamically connected but independent sections of the development system, the use of multi-stage hydraulic fracturing, well operation modes and others. As a result such conditions for the development of oil fields violate the main fundamentally important conditions for the application of extrapolation methods, leading to incorrect results.
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