Patent ID: 7256160
Filing Date: 2007-08-14
Classification: C09K,Y10S

Abstract:
1. A method for fracturing a subterranean formation comprising: a. pumping an anti-bacterial fracturing fluid composition down a wellbore to a subterranean formation; b. permitting the fracturing fluid composition to gel; c. pumping the fracturing fluid composition against the subterranean formation at sufficient rate and pressure to fracture the formation; d. breaking the fracturing fluid composition gel; e. leaving the fracturing fluid composition in the formation for at least 28 days; and f. subsequently flowing the fracturing fluid composition out of the formation; where the anti-bacterial fracturing fluid composition comprises: i) at least one hydratable polymer; ii) at least one water wetting control agent; iii) at least one clay control agent; iv) at least one microbe growth control agent; v) at least one scale inhibitor; vi) at least one breaking agent; and vii) at least one biocide different from iv) the microbe growth control agent; where the anti-bacterial fracturing fluid composition controls both sulfate-reducing bacteria and bio-polysaccharide (slime) production.