The characteristic of the geological and geochemical conditions of sedimentation of the main oil and gas strata in the section of the Perm region is given. A multivariate analysis of the geochemical characteristics of the DOM was carried out in the context of the hydrocarbon plays within the tectonic units of the platform and the Pre-Ural fore deep. Correlation interactions between the geochemical and bituminological characteristics of the DOM have been studied for each stratum. Using the scientific hypothesis of N.B. Vassoevich on the relationship between the bituminoid coefficient and the organic carbon content, the authors, using statistical analysis methods, for the first time, the division of the DOM into three main types – idiogenous, epigenetic and mixed has been justified at the quantitative level. The constructed linear regressive models and discriminant functions made it possible to justify the distribution of the DOM types in all sedimentary complexes of the Perm region. The patterns of distribution of the selected types of the DOM according to the to the difference in bituminological composition for all tectonic units of the Perm region are investigated. The lines have been established between the types of the DOM for all tectonic elements. The line between the idiogenous type of the DOM and the mixed type by bituminoid coefficient value is in the range of 15-18%, and between the mixed and epigenetic in the range of 28-32%. For the territories of the Bashkir arch and the Solikamsk sag, the values of TOC for mixed and epigenetic types of the DOM are less than 8%, and the main part of the idiogenous DOM is characterized by a concentration of TOC not exceeding 10%. The values of TOC concentrations for mixed and epigenetic DOM types in the context of the territory of the Yazva-Chusovaya structural zone do not exceed 2%. The main part of the idiogenous DOM is characterized by a concentration of TOC not exceeding 6%. The various processes of differentiation of the dispersed organic matter of the rocks of the main hydrocarbon plays for the territory of the platform and the fore deep are statistically substantiated. Based on the obtained percentage of types, a scheme of quantitative distribution of migrationally capable epigenetic bitumoids within the tectonic elements of the Perm region is drawn.
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