Geology, geography and global energy

Scientific and Technical Journal

Hydrochemical conditions of deep dives oil and gas bearig complexes

2013. №4, pp. 101-112

Larichev Vitaliy V.  - Ph.D. in Geology and Mineralogy, Associate Professor, Kuban State University, 149 Stavropolskaya st., Krasnodar, 350040, Russian Federation,, geoskubsu@mail.ru

Popkov Vasiliy I.  - D.Sc. in Geology and Mineralogy, Professor, Kuban State University, 149 Stavropolskaya st., Krasnodar, 350040, Russian Federation,, geoskubsu@mail.ru

Prospects for the discovery of new hydrocarbon accumulations in many oil and gas regions associated with the development of deep rock complexes studied to date are extremely scarce and not uniformly. As a result of a regional outline map of the hydrodynamic and hydrochemical zoning have low precision and subsequently rebuilt several times and supplemented as new data. A good example is the Caspian Basin, within which many researchers noted the presence of an inversion in the context of complex zoning, which is manifested in the reduction of salinity with depth. Data given in the article on hydrochemistry of formation waters suggest that inversion hydrochemical zoning within the Caspian Basin is a fact established and characterized by different contrast in different parts of it. The most representative material accumulated within the fields studied in detail, such as Karachaganak, Astrakhan, where dozens of wells tested. This makes it possible to construct a polygonal hydrochemical zoning scheme, giving a clearer picture of the mechanism of formation of hydrochemical zoning of deep strata. The analysis of materials on Karachaganak suggests that the observed differences in hydrochemistry of formation water is not necessary to explain the stratigraphic confinement assay intervals, and the presence in the field in the context of aquifer of the Lower Carboniferous and Upper Devonian marketplace hydrochemical zoning. Hydrochemical zoning aquifer system of the Lower Carboniferous and Upper Devonian shows scheduled match with its hydrodynamic zoning. In the central part of the field there is a vast field of hydrodynamic anomalies are spatially coincident with the most upbeat set of reef array. On the same field, and associated area of maximum bottom water desalination. Installed hydrochemical zoning subsalt deposits in the fields of the Caspian basin, which has inverted the nature and areal heterogeneity, does not fit into the scheme of the rising flow Elysion wring out water from clay strata of the central part of the basin to the periphery and may be due to the formation of vertical mass transport of fluids in the context of oil and gas basin.

Key words: complexes of deep,hydrochemical zoning,salinity,groundwater

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