Unconventional reservoirs have become an important resource for hydrocarbons. The production of this type of reservoir is only feasible from massive stimulation. In this context, the study of hydraulic fracturing becomes important. The present work has the objective of evaluating the influence of reservoir parameters that are uncertain, in the optimization of hydraulic fracturing. The parameters that will be evaluated are: drainage radius, permeability, net-pay, temperature and pressure of the reservoir. The optimization model uses evolutionary algorithms to maximize the production of the fractured well and minimize the fracture cost.

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