Potassium Carbonate
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Potassium Carbonate (K2CO3) is a suitable replacement for Potassium Chloride when providing inhibition for water-based fluids in environmentally sensitive areas, because it provides an alternative source of potassium ions for inhibition without the high levels of chlorides that can be harmful to the environment.
Potassium Carbonate can also be used for treating cement contaminated mud or calcium picked up while drilling anhydrite, by precipitating out calcium carbonate. For this reason, Potassium Carbonate is not suitable for use in calcium or lime based mud systems.
Potassium Carbonate concentration will depend on application and operational requirements. Use Potassium Carbonate concentrations for buffering format fluids at around 10.0 to 10.5 pH alkalinity ranges from 6 to 12 ppb (17 to 34 kg/m3).
The alkalinity of the fluid will not start to drop until the Potassium Carbonate gets depleted through reactions with acidic formation gases.