• scale
    Miscellaneous -English

    Scale and Sclae Inhibitors

      what is Scale? Scale is normally a buildup of salts of calcium, barium or strontium as calcium carbonate, barium sulfate and strontium sulfate. Carbonate scale is caused by the presence of calcium and bicarbonate ions in the formation water. When pressures are decreased or temperatures are increased, the bicarbonate will begin to decompose, resulting in pH increases and calcium carbonate precipitation in the form of scale. Barium and strontium sulfates form in wells that produce waters naturally saturated with barium or strontium sulfates, or when produced water containing barium or strontium is contaminated with a sulfate-bearing water. When seawater injection is employed, the seawater contains sulfate, and the formation…