Method evaluates wellbore stimulation efficiency

A new method determines the skin factor for stimulated wells producing against constant bottomhole pressure.Drilling, completion, and producing operations may reduce near-wellbore permeability, thereby increasing pressure loss due to skin and correspondingly reducing well productivity. This damage can be eliminated with acidizing or hydraulic fracturing that may improve the well productivity even exceediing production levels corresponding to undamaged conditions.1 Click here to enlarge imageTo assess the damage, one can use the equations shown in the accompanying equation box.Skin-factor calculationIf cumulative production and time data are available for a well produced against a constan...

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