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This article analyzes the prospects of petroleum potential in Kurgan region. The relevance of the work is due to the high degree of development of the traditional oil and gas recovery areas of Western Siberia, which leads to the need to organize search activities in areas with a low density of hydrocarbon resources. We have analyzed the results of exploratory drilling in the area of the Alabuga river in Kurgan region, and have studied the history of detections of onshore oil occurrences there. Based on the results of the retrospective analysis, the research area was determined, field work was performed to determine the state of search wells in the area, and a collection of geochemical soil and liquid samples was selected. The analysis of the samples revealed that all of them contain methane and its homologues up to and including pentane. The genesis of light methane homologs is related to the processes of catagenesis; their detection on the surface indicates active processes of generation and migration of petroleum hydrocarbons. Based on the analysis of archival materials and estimated ground-based geochemical studies, a conclusion is made about petroleum potential in Kurgan region.

The article is devoted to the problem of improving the substantiation of the diagnostics of production Jurassic and Neocomian reservoirs in the West Siberian basin. We have formed the complex of geochemical investigations of core material to solve this problem. It includes extraction of bitumen with its material composition detection, thermal desorption and analysis of retained hydrocarbons. Using the obtained data, we have carried out a comparative analysis of Jurassic sediment intervals in two wells within one field. We studied the quantitative and qualitative characteristics of the hydrocarbon core fluid, determined the geochemical criteria of its mobility in reservoir conditions, namely the ratio of the naphthenic component to n-alkanes. Also, we carried out inter-well correlation of the relations of n-alkanes and isoprenoids, established the facies conditions of sedimentogenesis and oxidation-reduction conditions of the initial stage of organic matter fossilization. Based on the chromatograms of retained gases we determined the efficiency criteria of the interval such as benzene/n-hexane and toluene/n-heptane. Conclusions about the saturation of the studied intervals were confirmed by inspection test record. The results of the work showed that complex geochemical studies of the core can significantly increase the reliability of the diagnosis of the drilled sediments saturation.