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Most remaining recoverable reserves (more than 62%) of the Perm Territory, Komi Republic and Nenets Autonomous Area (NAA) are concentrated in the carbonate reservoirs, so effective reserve recovery from the carbonate formations is a topical problem at present. Productive deposits with the carbonate-type reservoirs are confined to the Silurian, Lower Devonian, Upper Devonian-Tournaisian, Serpukhovian, Middle and Upper Carboniferous, and Lower Permian sediments. The production zones are characterized by a wide range of changes in the geological and physical parameters (Table 1).

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Summary The article describes the problem of low efficiency of acid and proppant hydraulic fracturing (HFT) using standard technology in conditions of closely spaced bottom waters of the low-permeable carbonate reservoir P1ar+k of the Pashninskoe field. The hydraulic fracturing technology has been optimized taking into account the geological and physical characteristics (GPC) of the reservoir under consideration and the main complicating factors in the implementation of well interventions (WI) for enhanced oil recovery (EOR). Optimized hydraulic fracturing technology showed high efficiency during testing. Well operation was monitored, according to the results of which the technology was transferred to the industrial category. The results of its replication are also presented. The average specific incremental oil rate from hydraulic fracturing according to the optimized technology was 0.68 tons/day/m, the oil production rate in 2018 increased by 9.4%.