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S. N. Popov
S. N. Popov
Ph.D.
Permian State Technical University
, Ph.D.
Permian State Technical University

Articles

Geotechnical Engineering and Engineering Geology
  • Date submitted
    2023-09-29
  • Date accepted
    2023-10-25
  • Online publication date
    2023-12-12
  • Date published
    2024-08-26

Laboratory studies of transformation of porosity and permeability and chemical composition of terrigenous reservoir rocks at exposure to hydrogen (using the example of the Bobrikovskii formations in the oil field in the northeast Volga-Ural oil and gas province)

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The article describes the methodology for laboratory studies of reservoir rock exposure to hydrogen. The stages of sample research and the instruments used in the experiments are considered. A comparative analysis of the results of studies on porosity and permeability of core samples was performed. It was shown that after exposure to hydrogen, the porosity decreased by 4.6 %, and the permeability by 7.9 %. The analysis of correlation dependencies demonstrated a typical change in the relationship of these characteristics: after the samples exposure to hydrogen the scatter of the values increased and the correlation coefficient decreased, which indicates a change in the structure of the void space. Based on the research results, it was concluded that the decrease in porosity and permeability of the core samples occurred due to their minor compaction under the action of effective stresses. The chemical analysis of the rock showed no major difference in the composition of the basic oxides before and after exposure to hydrogen, which points to the chemical resistance of the studied formation to hydrogen. The experimental results showed that the horizon under consideration can be a storage of the hydrogen-methane mixture.

How to cite: Popov S.N., Chernyshov S.E., Abukova L.A. Laboratory studies of transformation of porosity and permeability and chemical composition of terrigenous reservoir rocks at exposure to hydrogen (using the example of the Bobrikovskii formations in the oil field in the northeast Volga-Ural oil and gas province) // Journal of Mining Institute. 2024. Vol. 268. p. 646-655. EDN MFPSXV
Geology
  • Date submitted
    2021-12-21
  • Date accepted
    2022-06-20
  • Online publication date
    2022-11-07
  • Date published
    2022-11-10

Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling

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The article presents the results of analysing geological structure of the Famennian deposits (Devonian) in the Perm Region. Numerical modelling of the distribution of inhomogeneous stress field near the well was performed for the two considered types of perforation. With regard for the geometry of the forming perforation channels, numerical finite element models of near-wellbore zones were created considering slotted and cumulative perforation. It is ascertained that in the course of slotted perforation, conditions are created for a significant restoration of effective stresses and, as a result, restoration of reservoir rock permeability. Stress recovery area lies near the well within a radius equal to the length of the slots, and depends on the drawdown, with its increase, the area decreases. From the assessment of failure areas, it was found that in case of slotted perforation, the reservoir in near-wellbore zone remains stable, and failure zones can appear only at drawdowns of 10 MPa and more. The opposite situation was recorded for cumulative perforation; failure zones near the holes appear even at a drawdown of 2 MPa. In general, the analysis of results of numerical simulation of the stress state for two simulated types of perforation suggests that slotted perforation is more efficient than cumulative perforation. At the same time, the final conclusion could be drawn after determining the patterns of changes in permeability of the considered rocks under the influence of changing effective stresses and performing calculations of well flow rates after making the considered types of perforation channels.

How to cite: Chernyshov S.E., Popov S.N., Varushkin S.V., Melekhin A.A., Krivoshchekov S.N., Ren S. Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling // Journal of Mining Institute. 2022. Vol. 257. p. 732-743. DOI: 10.31897/PMI.2022.51
Problems in geodynamic and ecological safety in the exploration of fields of oil and das, their storage and transporta
  • Date submitted
    2009-10-16
  • Date accepted
    2009-12-07
  • Date published
    2010-04-01

Geomechanical and geodynamic problems ассompanying the мining of hydrocarbon deposits

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Rock mechanics in petroleum industry is used for determination of geomechanical models of rock mass, calculating parameters of rock subsidence, stability of oil and gas wells, problems relevant to geodynamics. The present paper describes the analytical and numerical analyses of compaction in reservoir, following reduction in filter-capacity performance and well productivity.

How to cite: Kashnikov Y.A., Ashikhmin S.G., Gladyshev S.V., Popov S.N. Geomechanical and geodynamic problems ассompanying the мining of hydrocarbon deposits // Journal of Mining Institute. 2010. Vol. 188. p. 153-157.