International Geologiical Congress - Oslo 2008

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GET-03 Water?rock interaction

 

Control of silica scaling using organic inhibitors/dispersants

 

Darrell Gallup, Chevron Corporation (United States)
Paul Hirtz, Thermochem, Inc. (United States)
 

 

Silica scaling from geothermal brines has been controlled by a variety of processes. The most common chemical inhibitor in use is acid. Decreasing the pH of brines slows the kinetics of silica polymerization reactions. Treatment of brines with acid may exacerbate corrosion. As a result, a new generation of silica inhibitors/dispersants has been developed. These inhibitors have been subjected to thermal degradation and tube blocking tests in the laboratory. The more promising inhibitors/dispersants have been field pilot or demonstration tested. The results of these tests will be presented.

 

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