Chloride from salt in training, and we can determine the concentration of chloride by titration with a solution of silver nitrate. The amount of chloride should be checked frequently. If you see changes in the chloride content, it can be indications of drilling in a saline formation, or to take the influx of water in reservoirs.
Why do we keep the amount of chloride in the drilling fluids?
Chloride is used to prevent a problem shale swelling.
How can we maintain?
We can maintain the chloride content in the drilling fluid by adding salts such as potassium chloride (KCl) and sodium chloride (NaCl). If you use pKClssium chloride (KCl), you must have enough potassium ions to react with the clay content of the training. In general, the minimum 3% KCl should be a good number to start. However, you may need to increase the concentration of KCl if you are drilling in formations containing many reactive clay content.
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