Patent ID: 7781380
Filing Date: 2010-08-24
Classification: C09K

Abstract:
1. A method of fracturing a subterranean formation, the method comprising: preparing at a wellsite in a mixer on the fly without residence time in a hydration tank, an aqueous fluid comprising an aqueous medium, an electrolyte, and a heteropolysaccharide selected from the group consisting of gellan gum and gellan gum derivatives, diutan gum and diutan gum derivatives, rhamsan gum and rhamsan gum derivatives, polysaccharide S-88 and polysaccharide S-88 derivatives, polysaccharide S-198 and polysaccharide S-198 derivatives, polysaccharide NW11 and polysaccharide NW11 derivatives, and any mixtures thereof; hydrating at the wellsite the prepared aqueous fluid from the mixer without residence time in a hydration tank prior to injecting the hydrated, prepared aqueous fluid into a wellbore penetrating the subterranean formation at the wellsite at a pressure sufficient to fracture the subterranean formation, wherein prior to injection into the wellbore—the aqueous fluid is hydrated to a level of at least about 85% hydration, determined as the percent ratio of the aqueous fluid viscosity at 1 minute relative to fluid viscosity at 30 minutes, and subsequently injecting the fluid into a wellbore penetrating the formation at the wellsite.