CALCIUM-FREE CLEAR HIGH DENSITY FLUIDS

摘要

Clear, high density calcium-free fluids for use as completion, packing and perforation media in oil and gas well formations having high carbonate and/or high sulfate ion concentrations are formulated from aqueous solutions of zinc bromide and one or more alkali metal bromides and have densities lying in the range of about 11.5 to 20.5 lb./gal and a pH lying in the range of about 1.0 to 7.5.