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Petroleum Engineer's Guide to Oil Field Chemicals and Fluids by Johannes Fink

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Chapter 8. Gelling Agents
Organic and inorganic gels are used to seal formations with high permeability. Sealing can be permanent or temporary. In this way, undesirable flows in the formation can be suppressed. Gelling agents are mainly used for water shutoff and to limit sand production. Some agents can be also used for primary plugging of surface and flow strings, as well as for eliminating lost circulation (Ryabokon and Goldshtein, 1989), but the high cost often limits wide applications.
Flow-deflecting technologies based on gel-forming agents are effective in highly water-invaded multizone reservoirs, where redistribution of the flow is achieved by equalizing the injectivity profile of the injection wells and reducing the content of produced ...

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