Geological and geochemical prerequisites of the Cambrian and Upper Proterozoic petroleum potential of southeastern West Siberia

The paper gives a detailed characteristics of naphthide shows identified in Lower Cambrian formations exposed by Lemok BH-1 (eastern West Siberia). In vestigation of biomarker hydrocarbons has shown a Late Precambrian age of t he identified naphthides and the presence of two types of oil-generating ro cks. Data on naphthide geochemistry, geological interpretation of seismic s urvey, and lithostratigraphic study of the section suggest that the Riphean deposits containing high-carbon sequences with a high petroleum potential are widespread in the study area and the Paleozoic deposits of the Kas-Dubc hes interfluve could be assigned to platform formations.