Seawater streamlines polymer-free fracturing

A novel seawater-based, polymer-free, fluid improved the operational efficiency of 23 frac packs in Eni Agip's Giovanna field, off Italy in the Adriatic Sea.The treatments were part of a three-well, multizone workover program, requiring large-sized fracture stimulation. These were the first successful treatments for Eni Agip that included seawater as the base fluid for Schlumberger's ClearFRAC system, a polymer-free, viscoelastic surfactant (VES) fracturing fluid.The novel frac-pack fluid not only tripled gas production, it did so at significantly lower cost than comparable operations with conventional fracturing fluids.The VES fluid created high fracture conductivities that led t...

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