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SPE.org 

Mitigation of stress shadowing could significantly enhance the impact of hydraulic fracturing treatments, increasing stimulated reservoir volume and leading to higher production of hydrocarbons. More than a decade ago, perforation cluster spacing was designed up to 700 ft in Barnett and Bakken plays. Today, the spacing is as close as 15 ft apart in Eagle Ford and DJ Basin and operators are optimizing fracture spacing for achieving higher initial production rates.