The anomalous characteristics of the Astrakhan Arch crustal structure were revealed during the seismic data interpretation. They indicate plastic deformations of the lower crust at the sites of its fluidization, manifestation of the waveguide and enhanced permeability zone properties in the upper crust in the ways of the fluid flow. The unique Astrakhan gas condensate field, localized in the carbonate platform of the Middle Carboniferous age at a depth of 4.0 – 4.5 km, was formed in the area of HC-containing deep fluid discharge
