Patent ID: 7595282

Claim:
A method for treating a subterranean formation penetrated by a wellbore, the method comprising the steps of: a. formulating an aqueous treatment fluid comprising: i. water; ii. diutan; and iii. a sufficient amount of salt to provide a salt solution of the water having a density of at least 8.5 lb/gal, wherein at least 50% by weight of the salt is selected from the group consisting of: (a) bromide salts, (b) non-bromide salts having a higher salting-in effect than bromide according to the Hofmeister series as measured by the salt's effect on the cloud point of poly(ethylene oxide) that has a molecular weight of 4×10 6 , and (c) any combination in any proportion thereof; b. introducing the treatment fluid through the wellbore.