The Structure of Continuous Reservoirs in the Domanik Formation and Petrophysical Interpretation Methods.

Autor: Zagranovskaya, D. E., Isaeva, S. I., Vilesov, A. P., Shashel, V. A., Zakharova, O. A., Belaykov, E. O., Demin, V. Y., Kudin, I. L., Kalmykov, G. A.
Zdroj: Moscow University Geology Bulletin; Feb2022, Vol. 77 Issue 1, p124-137, 14p
Abstrakt: The properties of unconventional prospective deposits are interconnected by the processes of reservoir formation and oil and gas formation. Dispersed dolomite formed in situ during the maturation of TOC from syngenetic magnesium in the rock matrix increases the pore space of the rock, thereby forming an unconventional reservoir filled with autochthonous hydrocarbons and oil components. In the process of TOC maturation and hydrocarbon migration the TOC components are redistributed in the pore space; the released volume of rocks is thus filled with stationary resinous asphaltene substances, which sharply reduces the reservoir properties of unconventional reservoirs. As a result, the definition of "organic" porosity includes a broader concept than just the porosity of kerogen. This is a more complex physicochemical process of transformation of the organic matter itself and the redistribution of elements within the formation as a result of the maturation of TOC components and hydrocarbon migration. When assessing the oil and gas potential in the section we distinguish three groups of rocks: unconventional reservoirs with an increased TOC content and the presence of mobile hydrocarbons; bituminous rocks, in which part of the pore volume is filled with resinous-asphaltene substances, and host dense carbonate rocks without organic matter. As well, sporadically developed traditional reservoirs are distinguished throughout the section of the Domanik type rocks. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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