SPECIFICITY OF OIL CONTENT AND ZONING OF THE BEREZNIKOVSKОE PALEOPLATEAU

Abstract


The aim of the work is to analyze oil content of the Bereznikovskoe paleoplateau, as exemplified by open hydro- carbon deposits. The paper forecasts oil potential of the Bereznikovskoe paleoplateau resource base. The article de- scribes peculiarities of fluid properties (density of oil and produced water, gas saturation of reservoir oil, oil viscosity, content of resins, asphaltenes, paraffins, etc.) on the fields of the Bereznikovskoe paleoplateau. On the basis of the previous works the applied criteria of classification features are listed to identify oil and gas accumulation zone of the Bereznikovskoe paleoplateau. The change of physicochemical oil properties is depicted on the diagrams including three oil-and-gas bearing complexes, namely Verkhnedevonsko-turneiskii, Verkhnevizeisko-bashkirskii (carbonate) and Nizhne-srednevizeiskii (terrigenous). The diagrams of physicochemical properties of reservoir fluids show clear linear zoning. Within the paleoplateau area the lines of equal values of oil density are distributed along the lines of me- ridional direction. The north-eastern depression area and the Ural’s front folds are associated with the lightest naphthene-methane oils, having lower content of sulphur, resins, asphaltenes. The analysis, including hydrochemical features of reservoir waters, allowed identification of two subzones of oil and gas accumulation within the Berezni- kovskoe paleoplateau, in which regularity of physicochemical oil properties distribution and oil traps filling degree is found. The difference in physicochemical properties of the Famensko-turneiskii complex for the Solikamskaia depres- sion is observed. The analysis of the oil content confirms the principle scheme of condensatogenic waters of the Solikamskaia depression, offered by V.G. Popov and Yu.A. Yakovlev (2002).The results may be applied in planning exploration in the Solikamskaia depression, estimation of hydrocarbon re- serves, reservoir engineering.


About the authors

A. I Savich

Perm National Research Polytechnic University

Author for correspondence.
Email: savichai@yandex.ru
614990, Perm, Komsomolsky av., 29

E. V Melnik

Perm National Research Polytechnic University

Email: qwer6977@yandex.ru
614990, Perm, Komsomolsky av., 29

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Copyright (c) 2014 Savich A.I., Melnik E.V.

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