Calcium Bromide

CaBr₂ clear brine is solids-free, eliminating the risk of barite or other solid particles invading and plugging the productive formation. Solids-free fluids maintain formation permeability, reduce skin damage, and can be removed without mechanical cleaning or acid treatment.

CaBr₂ brine is compatible with most formation brines and does not precipitate damaging solids at reservoir conditions when properly engineered. Compatibility testing with formation water is essential before use in CaSO₄-bearing formations.

Yes. CaBr₂ brine maintains its density and chemical stability at temperatures exceeding 200°C and pressures above 10,000 psi. For HPHT wells requiring densities above CaBr₂ saturation density (14.2 ppg), CaBr₂ is blended with ZnBr₂ to achieve the required density.

CaBr₂ brine is corrosive to carbon steel and low-alloy steel tubulars, especially at elevated temperatures. Corrosion inhibitors must be added to all CaBr₂ brine systems. High-density CaBr₂ may require corrosion-resistant alloy (CRA) tubulars. Oxygen exclusion is critical as dissolved oxygen accelerates corrosion significantly.

CaBr₂ is typically stored as concentrated liquid brine (52% solution at ~14.2 ppg) in closed, lined storage tanks to prevent atmospheric CO₂ absorption and oxygen ingress. Compatible storage materials include fibreglass, stainless steel, and high-density polyethylene (HDPE).