Hydrothermal-metasomatic systems as the most important factor for the formation of elements of the oil and gas-bearing complex in the Bazhenov-Abalak sediments

• Published in: Georesursy Vol. 23; no. 2; pp. 142 - 151
• Main Authors: Karpova, Evgenia V., Khotylev, Aleksey O., Manuilova, Ekaterina A., Mayorov, Aleksandr A., Krasnova, Elizaveta A., Khotylev, Oleg V., Balushkina, Natalia S., Kalmykov, Georgy A.
• Format: Journal Article
• Language: English; Russian
• Published: Georesursy Ltd 01-04-2024
• Subjects: bazhenov-abalak complex; catagenesis; gas-liquid inclusions; hydrothermal activity; isotope studies; metasomatism; west siberian plate
• ISSN: 1608-5043; 1608-5078
• DOI: 10.18599/grs.2021.2.14

A model of the activity of hydrothermal-metasomatic systems confined to certain structural elements is proposed in the present article. The model is based on the analysis of a large volume of traditional studies: measurements of porosity coefficients, permeability, pyrolytic measurements - together with specific measurements: isotopic composition of carbonate rocks, temperature of homogenization of gas-liquid inclusions, studies of the composition of rocks with a scanning electron microscope, a description of petrographic thin sections. The model allows to generalize the results of the impact of hydrothermal-metasomatic systems on the reservoir properties of the rocks of the Bazhenov-Abalak complex: constructive – leaching processes and increasing reservoir properties, and destructive – massive mineral formation that fills the pore space, up to the formation of secondary seals.