ROLE OF ENDOGENOUS FLUID SYSTEMS IN FORMATION OF OIL POTENTIAL OF THE VOLGA-URAL DOMANIC DEPOSITS ACCORDING TO RESULTS OF GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL STUDIES
Some aspects of formation of the Domanik deposits in the Volga-Ural province are considered. Geochemical studies have shown that in the geological section some horizons of elevated radioactivity are characterized by high concentrations of As, Te, Hg, Au, Ag, Re, Pd and Pt known to correlate with main volcanism events. The metal-enriched solutions entering the sedimentation basin ensured formation of geochemical anomalies. The possibility of deriving the Uranium content of rocks from well logs made it possible to identify fracture zones associated with faults in the basement, both in the «radial section» mode and on maps. Identification of the anomalies contributes to a rational planning of horizontal wells for extraction of shale oil and better contouring of already identified HC accumulations.