Secondary Dolomitization as a Factor Responsible for the Reservoir Properties of the Lower Devonian Sedimentary Rocks of the Eastern Wall of the Khoreiver Depression (Timan–Pechora Petroleum Basin)

The composition, structure, and secondary alteration of the Lower Devonian sedimentary rocks are characterized; the distribution of various types of pore spaces is analyzed and several types of dolomite structures are distinguished. The results of our works indicate that, depending on the permeabili...

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Bibliographic Details
Published in:Moscow University geology bulletin 2020-07, Vol.75 (4), p.353-362
Main Authors: Zhemchugova, V. A., Maslova, E. E.
Format: Article
Language:English
Subjects:
Carbonate rocks
Carbonates
Devonian
Dolomite
Dolomitization
Dolostone
Earth and Environmental Science
Earth Sciences
Fluids
Fossils
Geology
Permeability
Petroleum
Porosity
Sedimentary rocks
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Summary:The composition, structure, and secondary alteration of the Lower Devonian sedimentary rocks are characterized; the distribution of various types of pore spaces is analyzed and several types of dolomite structures are distinguished. The results of our works indicate that, depending on the permeability, solubility, and primary structure of the carbonate rocks or sediment, as well as the temperature, volume, and duration of influence of dolomitizing fluids, dolomitization can lead to an increase or decrease in porosity.
ISSN:0145-8752
1934-8436
DOI:10.3103/S014587522004016X