| abstract |
Treatment fluid suitable for use in subterranean formations may comprise: (i) an aqueous phase comprising water having at least 1,000 ppm total dissolved inorganic salts, wherein the aqueous phase comprises at least one of: a sulfate concentration of about 4,000 ppm or greater, a phosphate concentration of about 100 ppm or greater, a carbonate concentration of about 100 ppm or greater, or a barium concentration of about 37,000 ppm or greater; (ii) a carboxymethyl hydroxyethyl cellulose, wherein: (a) the carboxymethyl hydroxyethyl cellulose has a carboxymethyl degree of substitution is in the range of about 0.3 to about 0.45 per glucopyranose unit in the polymer; and (b) the carboxymethyl hydroxyethyl cellulose has a hydroxyethyl molecular substitution is in the range of about 2.1 to about 2.9 per glucopyranose unit in the polymer; and (c) the treatment fluid is substantially free of any crosslinker; and (iii) a breaker. |