Oil and gas complexes as a material expression of geofluid dynamic systems

The purpose of the present research is to analyze the geofluid dynamic concept of oil and gas formation. The research uses the author's data on the structure, composition and thickness of multi-aged oil and gas complexes of the Siberian platform (Russia). The oil and gas complexes identified as a result of the integrated geological, geochemical and geophysical studies carried out under oil and gas geological zoning and operational work are presented as a material expression of geofluid dynamic systems. Any geofluid dynamic system includes hydrocarbon generation centers, oil and gas migration routes, types of reservoirs and traps, lithological composition of reservoir rocks and reservoir cap rocks Also it is controlled by a favorable combination of their appearance in geological time and space. An ordinary fluid dynamic system is presented by hydrocarbon solutions generated by oil and gas generation centers, which are examples of a trivial defluidization of oil and gas source rocks of a sedimentary basin. This study allowed to be the first who has identified the elements of multi-age geofluid dynamic systems, presented their material expression in the form of multi-age oil and gas bearing complexes as well as analyzed the composition of hydrocarbons on the example of individual deposits of variousoil and gas-bearing areas. Besides, possible generation centers of hydrocarbon fluids and ways of their migration were investigated. Oil fields of different ages of the oil and gas bearing provinces of the Siberian Platform feature different composition and density, whereas according to numerous available data, they belong to a single genetic type, which is characterized by the predominance of methane hydrocarbons.

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