No abstract

No abstract

SUMMARYThe article presents the results of the interpretation of a complex geochemical study of the organic matter of samples of different age of Paleozoic rocks from wells in the southern part of the PreUrals foredeep. It was found that in all the studied oil and gas complexes (Lower Devonian -Frasnian, Frasnian -Tournaisian, Visean -Bashkir and Lower Permian) have their own syngenetic source rocks characterized by different generational potential and confinement to a particular litho-facies zones.

SUMMARYBy results of researches the similarity of biomarker parameters of Saratov and Orenburg oils by origin and geological age is revealed. For most of the genetic parameters, the oil of the Orenburg field is of type A1, of marine origin, generated under reducing conditions; Oil is characterized by an elevated metal content. Petroleum of Saratov deposits is generated under sub-regenerative conditions in coastal-marine horizons; In them there are practically no metal-containing compounds.

SUMMARYThe article describes the stages of development of the eastern side of the southern segment of the PreUrals foredeep and the zone of the Urals advanced folding zone and mechanisms for the formation of hydrocarbon accumulations in uplift-thrust structures of these zones. To restore the succession of the flow of shaggythrust processes, which are associated with the origin and development of the Urals advanced folding zone, the technology implemented in the Dynel software of Schlumberger was used.Based on the results of the research, a conceptual model for the formation of hydrocarbon accumulations in uplift-thrust and sub-slip zones has been created. It is shown that uplift-thrust dislocations should be considered as the most important oil and gas control elements in the region.