Patent ID: 7207386

Claim:
A method of hydraulically fracturing a hydrocarbon-bearing subterranean formation and reducing unwanted water production resulting therefrom, the method comprising: (a) introducing a proppant-free fluid into the subterranean formation for a time and at an injection rate sufficient to initiate fracturing in and below the productive zone of the subterranean formation; (b) introducing into the subterranean formation a proppant laden slurry containing relatively lightweight density proppant; wherein at least one of the following conditions prevail: (i.) the fluid density of the proppant-free fluid is greater than the fluid density of the proppant laden slurry; or (ii) the viscosity of the proppant-free fluid is greater than the viscosity of the proppant laden slurry wherein, subsequent to fracturing, the area below the productive zone exhibits lower conductivity to the inflow of bottom water and no increase in fracture conductivity.