| Autor: |
Telin, A. G., Strizhnev, V. A., Fakhreeva, A. V., Asadullin, R. R., Lenchenkova, L. E., Ratner, A. A., Chepenko, V. S. |
| Předmět: |
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| Zdroj: |
Journal of Engineering Physics & Thermophysics; Mar2023, Vol. 96 Issue 2, p513-519, 7p |
| Abstrakt: |
In using flow diversion and water shutoff technologies, the most widely used sealing compounds are polyacrylamide solutions crosslinked with Cr3+ ions. To achieve high technological efficiency, it is necessary to retain structural and mechanical properties of a sealing compound. Earlier, we proposed a hydrogel made up of sodium silicate and polyacrylamide crosslinked by chromium acetate which has good rheological characteristics and high residual resistance factors during filtration in fractures. It is noted that the addition of a dispersed filler increases substantially the composition efficiency. In this investigation, a study has been made of the rheology of hydrogels on the basis of sodium silicate, polyacrylamide, and chromium acetate with a dispersed filler (rice husk) in filtration through a model of an ideal fracture of various degree of openness. It has been established that the addition of a dispersed filler increases substantially the strength of water shutoff screen after filtration in fractures. In this case, there is almost no mechanical destruction of hydrogel with a filler in large fractures. For comparison investigations with hydrogel on the basis of polyacrylamide, resorcinol, and paraform were conducted. It is shown that after filtration in fractures, hydrogels on the basis of polyacrylamide, resorcinol, and paraform do not experience, in practice, any mechanochemical destruction. The experimental results indicate that the introduction of dispersed materials into hydrogels for water shutoff of fractured reservoirs increase significantly the technological efficiency of processes by decreasing the mechanical destruction and increasing the residual resistance factor [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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