We present results of lithofacies, reservoir, geochemical, well logging, and petrophysical studies of the key section of the Vendian–Lower Cambrian Preobrazhenka productive horizon in the Lena–Tunguska province. We have considered the composition, structure, and formation conditions of the deposits as well as the intensity of postsedimentation processes and the rock geochemistry, petrophysics, and reservoir properties.

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