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Conformational Analysis of the Multicomponent Media Used in Oil and Gas Production Technologies for Water Shutoff

  • Selected articles originally published in Russian in Rossiiskii Khimicheskii Zhurnal (Russian Chemistry Journal)
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Abstract

The rheological behavior of the complex hydrogel systems used for water shutoff in high water-cut wells, before and after filtration in cracks with different openings, was studied. The research objects were multicomponent mixtures of solutions of sodium silicate and polyacrylamide (PAA), crosslinked with Cr3+ salts, with additions of solid particles of lignin nature. The experimental data were analyzed using the approach considering the active medium as consisting of many particles, structural elements, each exhibiting a specific relaxation time. It was assumed that the external field of mechanical forces, characterized by shear stress, causes reversible activation excitation and decay of a group of the structural elements. The viscous flow activation energy, determined in the time interval Δt, corresponds to the average energy required to overcome intermolecular forces of various nature. Processing of the data on the rheological characteristics of the hydrogels at different temperatures revealed a quasi-discrete character of the spectra of the structural elements. Analysis of the autocorrelation functions (ACFs) of the spectra indicates a strong cooperative interaction of the structural elements.

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Authors and Affiliations

  1. Mendeleev Russian University of Chemical Technology, 125047, Moscow, Russia

    V. P. Meshalkin

  2. Ufa State Petroleum Technical University, 450062, Ufa, Russia

    L. E. Lenchenkova, M. Yu. Dolomatov & A. I. Voloshin

  3. Ufa Institute of Chemistry, Ufa Federal Research Center, Russian Academy of Sciences, 450054, Ufa, Russia

    A. V. Fakhreeva

  4. Ufa Scientific Research Center LLC, 450078, Ufa, Russia

    A. G. Telin

  5. Bashkir State University, 450076, Ufa, Russia

    M. Yu. Dolomatov

Authors
  1. V. P. Meshalkin
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  2. L. E. Lenchenkova
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  3. M. Yu. Dolomatov
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  4. A. V. Fakhreeva
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  5. A. I. Voloshin
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  6. A. G. Telin
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Correspondence to V. P. Meshalkin.

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Meshalkin, V.P., Lenchenkova, L.E., Dolomatov, M.Y. et al. Conformational Analysis of the Multicomponent Media Used in Oil and Gas Production Technologies for Water Shutoff. Russ J Gen Chem 93, 694–705 (2023). https://doi.org/10.1134/S1070363223030246

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  • DOI: https://doi.org/10.1134/S1070363223030246

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