Patent ID: 6508307
Filing Date: 2003-01-21
Classification: C09K,E21B

Abstract:
A method for fracturing a subterranean formation in communication with the surface through a wellbore lined with casing, said method comprising:determining the direction of maximum in situ stress within said formation; placing a perforating gun into said wellbore; orienting said gun along a single vertical plane extending in the direction of maximum in situ stress; actuating said gun to perforate said casing; and performing a propped fracturing treatment by injecting a low viscosity fluid into said wellbore and allowing it to enter said formation through said perforations, thereby creating or extending a fracture, wherein said low viscosity fluid has a viscosity below about 100 cp yet has sufficient viscosity to deliver a desired amount of proppant into said fracture, thereby controlling the fracture propagation.