Brine Stabilization with Sodium Hexametaphosphate

Abstract

produced with oil usually contain high bicarbonate concentrations. The solubility of these bicarbonates depends upon the quantity of carbon dioxide held in solution which, in turn, is largely dependent on the temperature, pressure, and composition of the water. As the water is produced, much of the carbon dioxide is liberated as a result of the reduction in pressure; the bicarbonates decompose to form carbonates, particularly the calcium salt, in excess of its solubility: Ca(HC03)2 <=* CaCOs (solid) f + C02 t + H20