Abstract: The base platform areas geological structure study represents the composite and actual issues, solution of which is directed on knowledge of development and evolution history of crust and sedimentary cover of the studied territories. Exhaustive ideas of the base geological structure make the basis of the formation process exact comprehension for sedimentary cover and regularities of mineral deposits placement in it, first of all, oil and gas. In study results of crystal base study of the Volga-Kamsky anteclise central part are considered. Implementation of the deep drilling long-term program allowed to reveal the numerous loosened zones which are characterized by water saturation in crystal base solids. The content of the dissolved hydro-carbonic gases in water as well as oil row bitumoid presence in the loosened zones specifies that through the crystal base there was a migration of oil hydro-carbons, the deep fluids containing hydro-carbons, gases. Solids of the base represent a great interest from the oil fields origin point of view and also in aspect of deep fluid systems migration. Geo-dynamic activity of the loosened zones shows the modern processes of fluid migration and their influence on oil field formation in a sedimentary cover.