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The oil fields of the Vereysky horizon (C2vr) are regional oil saturated on the Tatarstan Republic and located in the oil-and-gas-bearing Serpukhovsky-Vereysky basinal complex. In the sections are interbedding of various facial types of limestone with marls, clays, and sandstones. From below upwards along the section, the proportion of the clastic component increases and the carbonate component decreases. In the anticline structure, Vireysky oil-saturated reservoirs form multilayers series. Oil reservoirs are conf...