In the oil and gas industry, sodium bromide (NaBr) is used to formulate high-density completion fluids, which play a critical role in well control, formation protection, and efficient wellbore operations.

Formation pressure → choose required fluid density → dissolve solid NaBr in water → get high-density clear brine → pump brine into wellbore → hydrostatic column pressure ≥ formation pressure → prevents influx/blowout and supports borehole wall.