The low completeness of oil and gas recovery is due to the fact that development projects do not take into account a number of natural phenomena in pools: 1. Multi-scale block-fractured structure of pools; 2. Features of fluid flow through low-permeable rocks, which determine the reservoir compartmentalization; 3. Interaction of oil and condensate with porous media. These phenomena have been studied and it has been proven that taking them into account can significantly increase the completeness of hydrocarbon recovery and reduce development costs.