TY - SER AU - Pitoni,Enzo AU - Burrafato,Giovanni AU - Devia,Fabrizio AU - Heitmann,Norbert AU - Burrafato,Giovanni AU - Devia,Fabrizio AU - Heitmann,Norbert TI - Polymer-free fracturing fluid revives shut-in well: Dirty, tight sand intervals were simulated, producing large fractre widths and a three-fold increase in the well's initial flow rate ER -