Uranium in Source Rocks: Role of Redox Conditions and Correlation with Productivity in the Example of the Bazhenov Formation

The paper reports comprehensive analysis of different factors affecting uranium content in oil source rocks and the relationship between productivity rocks. data for 13 wells Bazhenov Formation (Western Siberia, Russia) was carried out. measured by gamma-ray spectrometry on core samples. In order to analyze accumulation rocks, we studied characteristics organic matter (Rock-Eval pyrolysis), also mineral, element, isotope composition We have shown that redox conditions at sedimentation stage most pronounced impact Formation. It productive intervals, containing increased amounts mobile hydrocarbons, are characterized low (<20 ppm) concentration uranium. However, phosphorite minerals may show better reservoir properties saturation higher correlations relationships Rock-Eval pyrolysis indexes (oil index index) enabled formulation criteria selection oil-saturated intervals using spectral gamma pulsed neutron spectroscopy log data.