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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).