CONFORMATIONAL ANALYSIS OF MULTICOMPONENT MEDIA USED IN TECHNOLOGICAL PROCESSES OIL AND GAS PRODUCTION FOR WATER INSULATION
Abstract
The rheological behavior of complex hydrogel systems used for water isolation of highly watered wells, in free volume and after filtration in cracks of different openings, has been studied. The objects of the study are multicomponent mixtures of solutions of sodium silicate, polyacrylamide (PAA), crosslinked with Cr3+ salts, with additives of solid particles of lignin nature. To analyze the experimental data, an approach was used in which the active medium is considered to consist of many particles – structural elements, and each of them is characterized by a certain relaxation time. It is assumed that the external field of mechanical forces, characterized by shear stress, causes reversible activation excitation and decay of a group of structural elements. The activation energy of the viscous flow, determined in the time interval Δt, characterizes the average energy required to overcome intermolecular forces of various nature. Based on the processing of data on the rheological characteristics of hydrogels at different temperatures, it is shown that the spectra of structural elements have a quasi-discrete character. The analysis of the autocorrelation functions (ACF) of the spectrum indicates a strong cooperative interaction of structural elements.
For citation:
Meshalkin V.P., Lenchenkova L.E., Dolomatov M.Yu., A.V. Fakhreeva, Voloshin A.I., Telin A.G. Conformational analysis of multicomponent media used in technological processes oil and gas production for water insulation. Ros. Khim. Zh. 2022. V. 66. N 3. P. 37-49. DOI: 10.6060/rcj.2022663.6.
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