Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9531267 | Journal of Volcanology and Geothermal Research | 2005 | 21 Pages |
Abstract
Mineral equilibrium modeling indicates that the aquifer waters in these selected geothermal wells, with some exceptions, are oversaturated with respect to calcite, aragonite, and celestite, but undersaturated with respect to gypsum, anhydrite, fluorite, Ca-montmorillonite, anorthite, albite-low, gibbsite, illite, kaolinite, and K-feldspar. The waters are at near saturation with respect to chalcedony, quartz, amorphous silica, dolomite, and strontianite. Calculation of mineral saturation states, geochemical studies, and field observations show that carbonate minerals (calcite, aragonite, and dolomite), amorphous silica, and sulfate minerals (celestite and anhydrite) are most likely to be precipitated as scales in geothermal wells. Assessment of calcite and amorphous silica scaling tendencies for selected well waters indicates that hot injection is favorable for Tuzla well T-2 (â¼50-170 ÅC) and for Kızıldere wells R-1 and KD-6 (around 100 ÅC). For the other wells, cold injection (<50 ÅC) is favored if calcite and amorphous silica accumulation is to be avoided in injection wells.
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Authors
Gültekin Tarcan,