Patent ID: 8096360
Filing Date: 2012-01-17
Classification: C09K,Y10S

Abstract:
1. A method of fracturing a subterranean formation penetrated by a well bore, the method comprising the steps of: a. providing a crosslinked polymer gel comprising an aqueous fluid, a hydratable polymer, a crosslinking agent capable of crosslinking the hydratable polymer, and an enzyme breaker comprising an alkaline β-mannanase derived from an alkaliphilic b. injecting the crosslinked polymer gel into the well bore and into contact with the formation under sufficient pressure to fracture the surrounding subterranean formation; and c. allowing the enzyme breaker to degrade the crosslinked polymer gel so that it can be removed from the subterranean formation, the enzyme breaker being catalytically active and temperature stable in a temperature range of about 60° F. to about 225° F.