Method Study Of Optimizing Parameters Of Channel Fracturing

Channel fracturing, a new stimulation technique, achieved great results in low permeability reservoir and unconventional reservoir development. Using certain ways, open channels are formed within fracture while channel fracturing. Fluid flow do not confine with proppant pack pores, so the fracture conductivity is several magnitudes higher than general hydraulic fracture conductivity, and stimulation effect is better than general ways. Based on sufficient literature review, this paper concluded the technology requirements, geological condition and fracturing material of channel fracturing. Modified experiment device to simulate channel fracturing process, conducted experimental study of the influence of fiber concentration, perforation strategy, pulse injection, fluid velocity and fracture fluid viscosity to channel fracturing proppant placement. Abstracting proppant distribution in fracture from the proppant placement, using fracture conductivity device surveyed the relationship between fracture conductivity and ways of proppant distribution, sand concentration and fiber concentration. Based on experiment results, modeling of channel fracturing proppant settlement and transport rule, add coefficients of correction of fiber and pulse injection in the model. Combining the theoretical model and experiment results, write a program of channel fracturing technological parameter optimization. Using the program to compute the proppant settlement velocity, transport velocity and channel rate under different technological parameters, then optimize the results and design the pumping schedule. The conclusions of this paper will provide theoretical basis for the application of channel fracturing and could be instructive to field operation.