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Bitumen deposits in Permian sediments in the Volga-Ural region are interesting as sources of unconventional oil. The reservoir rocks in the bituminous deposits are sand and sandstone of varying degrees of strength. For the prognosis of productive areas, it is important to study the peculiarities of the composition of bitumen-containing rocks and the mechanisms of localization of oil matter in them. These processes are closely related to the conditions of formation of the surrounding rocks. We examined samples of b...